FluentValidation在C# WPF中的应用

岭南综艺电影

1. 引言

在.NET开发领域，FluentValidation以其优雅、易扩展的特性成为开发者进行属性验证的首选工具。它不仅适用于Web开发，如MVC、Web API和ASP.NET CORE，同样也能完美集成在WPF应用程序中，提供强大的数据验证功能。本文将深入探讨如何在C# WPF项目中运用FluentValidation进行属性验证，并展示如何通过MVVM模式实现这一功能。
2. 功能概览

我们的目标是构建一个WPF应用程序，它能够通过FluentValidation实现以下验证功能：

• 验证ViewModel层的基本数据类型属性，如int、string等。
  
• 对ViewModel中的复杂属性进行验证，这包括对象属性的子属性以及集合属性。
  
• 提供两种直观的错误提示样式，以增强用户体验。
  

先看实现效果图：

3. 解决问题与探索

在调研过程中，我发现FluentValidation官方文档主要关注于Web应用的验证。对于WPF和复杂属性的验证，官方文档提供的示例有限。然而，通过深入研究和实践，我找到了将FluentValidation与WPF结合使用的有效方法，特别是针对复杂属性的验证。
4. 开发步骤

4.1. 创建工程、库引入

首先，创建一个新的WPF项目，并引入FluentValidation库用于属性验证，以及Prism.Wpf库以简化MVVM模式的实现。

1. <ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup>

复制代码

4.2. 创建实体类

我创建了两个实体类：Student和Field，分别代表对象属性和集合项属性。这两个类都实现了IDataErrorInfo接口：

• IDataErrorInfo接口常用于提供实体数据验证的错误信息。这个接口包含两个成员：一个索引器（this[string columnName]）和一个Error属性。索引器用于按属性名称提供错误信息，而Error属性则用于提供整个实体的错误概述。
  
• 两个实体类和另外在后面提及的ViewModel中也实现IDataErrorInfo接口，并在this[string columnName]索引器和Error属性中使用FluentValidation来验证属性。
  

4.2.1. 普通类 - Student

学生类包含5个属性：名字、年龄、邮政编码、最小值和最大值，其中最小值和最大值涉及关联验证，即最小值变化后通知最大值验证，反之同理。

1. /// ///<ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup> 学生实体///<ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup> 继承BindableBase,即继承属性变化接口INotifyPropertyChanged///<ItemGroup>
8.   <PackageReference Include="FluentValidation" Version="11.9.0" />
9.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
10. </ItemGroup> 实现IDataErrorInfo接口，用于FluentValidation验证，必须实现此接口/// public class Student : BindableBase, IDataErrorInfo{<ItemGroup>
11.   <PackageReference Include="FluentValidation" Version="11.9.0" />
12.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
13. </ItemGroup>private int _age;<ItemGroup>
14.   <PackageReference Include="FluentValidation" Version="11.9.0" />
15.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
16. </ItemGroup>private string? _name;<ItemGroup>
17.   <PackageReference Include="FluentValidation" Version="11.9.0" />
18.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
19. </ItemGroup>private string? _zip;<ItemGroup>
20.   <PackageReference Include="FluentValidation" Version="11.9.0" />
21.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
22. </ItemGroup>private readonly StudentValidator _validator = new();<ItemGroup>
23.   <PackageReference Include="FluentValidation" Version="11.9.0" />
24.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
25. </ItemGroup>public string? Name<ItemGroup>
26.   <PackageReference Include="FluentValidation" Version="11.9.0" />
27.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
28. </ItemGroup>{<ItemGroup>
29.   <PackageReference Include="FluentValidation" Version="11.9.0" />
30.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
31. </ItemGroup><ItemGroup>
32.   <PackageReference Include="FluentValidation" Version="11.9.0" />
33.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
34. </ItemGroup>get => _name;<ItemGroup>
35.   <PackageReference Include="FluentValidation" Version="11.9.0" />
36.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
37. </ItemGroup><ItemGroup>
38.   <PackageReference Include="FluentValidation" Version="11.9.0" />
39.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
40. </ItemGroup>set => SetProperty(ref _name, value);<ItemGroup>
41.   <PackageReference Include="FluentValidation" Version="11.9.0" />
42.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
43. </ItemGroup>}<ItemGroup>
44.   <PackageReference Include="FluentValidation" Version="11.9.0" />
45.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
46. </ItemGroup>public int Age<ItemGroup>
47.   <PackageReference Include="FluentValidation" Version="11.9.0" />
48.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
49. </ItemGroup>{<ItemGroup>
50.   <PackageReference Include="FluentValidation" Version="11.9.0" />
51.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
52. </ItemGroup><ItemGroup>
53.   <PackageReference Include="FluentValidation" Version="11.9.0" />
54.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
55. </ItemGroup>get => _age;<ItemGroup>
56.   <PackageReference Include="FluentValidation" Version="11.9.0" />
57.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
58. </ItemGroup><ItemGroup>
59.   <PackageReference Include="FluentValidation" Version="11.9.0" />
60.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
61. </ItemGroup>set => SetProperty(ref _age, value);<ItemGroup>
62.   <PackageReference Include="FluentValidation" Version="11.9.0" />
63.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
64. </ItemGroup>}<ItemGroup>
65.   <PackageReference Include="FluentValidation" Version="11.9.0" />
66.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
67. </ItemGroup>public string? Zip<ItemGroup>
68.   <PackageReference Include="FluentValidation" Version="11.9.0" />
69.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
70. </ItemGroup>{<ItemGroup>
71.   <PackageReference Include="FluentValidation" Version="11.9.0" />
72.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
73. </ItemGroup><ItemGroup>
74.   <PackageReference Include="FluentValidation" Version="11.9.0" />
75.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
76. </ItemGroup>get => _zip;<ItemGroup>
77.   <PackageReference Include="FluentValidation" Version="11.9.0" />
78.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
79. </ItemGroup><ItemGroup>
80.   <PackageReference Include="FluentValidation" Version="11.9.0" />
81.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
82. </ItemGroup>set => SetProperty(ref _zip, value);<ItemGroup>
83.   <PackageReference Include="FluentValidation" Version="11.9.0" />
84.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
85. </ItemGroup>}<ItemGroup>
86.   <PackageReference Include="FluentValidation" Version="11.9.0" />
87.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
88. </ItemGroup>private int _minValue;<ItemGroup>
89.   <PackageReference Include="FluentValidation" Version="11.9.0" />
90.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
91. </ItemGroup>public int MinValue<ItemGroup>
92.   <PackageReference Include="FluentValidation" Version="11.9.0" />
93.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
94. </ItemGroup>{<ItemGroup>
95.   <PackageReference Include="FluentValidation" Version="11.9.0" />
96.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
97. </ItemGroup><ItemGroup>
98.   <PackageReference Include="FluentValidation" Version="11.9.0" />
99.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
100. </ItemGroup>get => _minValue;<ItemGroup>
101.   <PackageReference Include="FluentValidation" Version="11.9.0" />
102.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
103. </ItemGroup><ItemGroup>
104.   <PackageReference Include="FluentValidation" Version="11.9.0" />
105.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
106. </ItemGroup>set<ItemGroup>
107.   <PackageReference Include="FluentValidation" Version="11.9.0" />
108.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
109. </ItemGroup><ItemGroup>
110.   <PackageReference Include="FluentValidation" Version="11.9.0" />
111.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
112. </ItemGroup>{<ItemGroup>
113.   <PackageReference Include="FluentValidation" Version="11.9.0" />
114.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
115. </ItemGroup><ItemGroup>
116.   <PackageReference Include="FluentValidation" Version="11.9.0" />
117.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
118. </ItemGroup><ItemGroup>
119.   <PackageReference Include="FluentValidation" Version="11.9.0" />
120.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
121. </ItemGroup>SetProperty(ref _minValue, value);<ItemGroup>
122.   <PackageReference Include="FluentValidation" Version="11.9.0" />
123.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
124. </ItemGroup><ItemGroup>
125.   <PackageReference Include="FluentValidation" Version="11.9.0" />
126.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
127. </ItemGroup><ItemGroup>
128.   <PackageReference Include="FluentValidation" Version="11.9.0" />
129.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
130. </ItemGroup>// 关联更新最大值验证<ItemGroup>
131.   <PackageReference Include="FluentValidation" Version="11.9.0" />
132.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
133. </ItemGroup><ItemGroup>
134.   <PackageReference Include="FluentValidation" Version="11.9.0" />
135.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
136. </ItemGroup><ItemGroup>
137.   <PackageReference Include="FluentValidation" Version="11.9.0" />
138.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
139. </ItemGroup>RaisePropertyChanged(nameof(MaxValue));<ItemGroup>
140.   <PackageReference Include="FluentValidation" Version="11.9.0" />
141.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
142. </ItemGroup><ItemGroup>
143.   <PackageReference Include="FluentValidation" Version="11.9.0" />
144.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
145. </ItemGroup>}<ItemGroup>
146.   <PackageReference Include="FluentValidation" Version="11.9.0" />
147.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
148. </ItemGroup>}<ItemGroup>
149.   <PackageReference Include="FluentValidation" Version="11.9.0" />
150.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
151. </ItemGroup>private int _maxValue;<ItemGroup>
152.   <PackageReference Include="FluentValidation" Version="11.9.0" />
153.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
154. </ItemGroup>public int MaxValue<ItemGroup>
155.   <PackageReference Include="FluentValidation" Version="11.9.0" />
156.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
157. </ItemGroup>{<ItemGroup>
158.   <PackageReference Include="FluentValidation" Version="11.9.0" />
159.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
160. </ItemGroup><ItemGroup>
161.   <PackageReference Include="FluentValidation" Version="11.9.0" />
162.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
163. </ItemGroup>get => _maxValue;<ItemGroup>
164.   <PackageReference Include="FluentValidation" Version="11.9.0" />
165.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
166. </ItemGroup><ItemGroup>
167.   <PackageReference Include="FluentValidation" Version="11.9.0" />
168.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
169. </ItemGroup>set<ItemGroup>
170.   <PackageReference Include="FluentValidation" Version="11.9.0" />
171.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
172. </ItemGroup><ItemGroup>
173.   <PackageReference Include="FluentValidation" Version="11.9.0" />
174.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
175. </ItemGroup>{<ItemGroup>
176.   <PackageReference Include="FluentValidation" Version="11.9.0" />
177.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
178. </ItemGroup><ItemGroup>
179.   <PackageReference Include="FluentValidation" Version="11.9.0" />
180.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
181. </ItemGroup><ItemGroup>
182.   <PackageReference Include="FluentValidation" Version="11.9.0" />
183.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
184. </ItemGroup>SetProperty(ref _maxValue, value);<ItemGroup>
185.   <PackageReference Include="FluentValidation" Version="11.9.0" />
186.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
187. </ItemGroup><ItemGroup>
188.   <PackageReference Include="FluentValidation" Version="11.9.0" />
189.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
190. </ItemGroup><ItemGroup>
191.   <PackageReference Include="FluentValidation" Version="11.9.0" />
192.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
193. </ItemGroup>// 关联更新最小值验证<ItemGroup>
194.   <PackageReference Include="FluentValidation" Version="11.9.0" />
195.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
196. </ItemGroup><ItemGroup>
197.   <PackageReference Include="FluentValidation" Version="11.9.0" />
198.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
199. </ItemGroup><ItemGroup>
200.   <PackageReference Include="FluentValidation" Version="11.9.0" />
201.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
202. </ItemGroup>RaisePropertyChanged(nameof(MinValue));<ItemGroup>
203.   <PackageReference Include="FluentValidation" Version="11.9.0" />
204.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
205. </ItemGroup><ItemGroup>
206.   <PackageReference Include="FluentValidation" Version="11.9.0" />
207.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
208. </ItemGroup>}<ItemGroup>
209.   <PackageReference Include="FluentValidation" Version="11.9.0" />
210.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
211. </ItemGroup>}<ItemGroup>
212.   <PackageReference Include="FluentValidation" Version="11.9.0" />
213.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
214. </ItemGroup>public string this[string columnName]<ItemGroup>
215.   <PackageReference Include="FluentValidation" Version="11.9.0" />
216.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
217. </ItemGroup>{<ItemGroup>
218.   <PackageReference Include="FluentValidation" Version="11.9.0" />
219.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
220. </ItemGroup><ItemGroup>
221.   <PackageReference Include="FluentValidation" Version="11.9.0" />
222.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
223. </ItemGroup>get<ItemGroup>
224.   <PackageReference Include="FluentValidation" Version="11.9.0" />
225.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
226. </ItemGroup><ItemGroup>
227.   <PackageReference Include="FluentValidation" Version="11.9.0" />
228.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
229. </ItemGroup>{<ItemGroup>
230.   <PackageReference Include="FluentValidation" Version="11.9.0" />
231.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
232. </ItemGroup><ItemGroup>
233.   <PackageReference Include="FluentValidation" Version="11.9.0" />
234.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
235. </ItemGroup><ItemGroup>
236.   <PackageReference Include="FluentValidation" Version="11.9.0" />
237.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
238. </ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
239.   <PackageReference Include="FluentValidation" Version="11.9.0" />
240.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
241. </ItemGroup><ItemGroup>
242.   <PackageReference Include="FluentValidation" Version="11.9.0" />
243.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
244. </ItemGroup><ItemGroup>
245.   <PackageReference Include="FluentValidation" Version="11.9.0" />
246.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
247. </ItemGroup>if (validateResult.IsValid)<ItemGroup>
248.   <PackageReference Include="FluentValidation" Version="11.9.0" />
249.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
250. </ItemGroup><ItemGroup>
251.   <PackageReference Include="FluentValidation" Version="11.9.0" />
252.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
253. </ItemGroup><ItemGroup>
254.   <PackageReference Include="FluentValidation" Version="11.9.0" />
255.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
256. </ItemGroup>{<ItemGroup>
257.   <PackageReference Include="FluentValidation" Version="11.9.0" />
258.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
259. </ItemGroup><ItemGroup>
260.   <PackageReference Include="FluentValidation" Version="11.9.0" />
261.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
262. </ItemGroup><ItemGroup>
263.   <PackageReference Include="FluentValidation" Version="11.9.0" />
264.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
265. </ItemGroup><ItemGroup>
266.   <PackageReference Include="FluentValidation" Version="11.9.0" />
267.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
268. </ItemGroup>return string.Empty;<ItemGroup>
269.   <PackageReference Include="FluentValidation" Version="11.9.0" />
270.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
271. </ItemGroup><ItemGroup>
272.   <PackageReference Include="FluentValidation" Version="11.9.0" />
273.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
274. </ItemGroup><ItemGroup>
275.   <PackageReference Include="FluentValidation" Version="11.9.0" />
276.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
277. </ItemGroup>}<ItemGroup>
278.   <PackageReference Include="FluentValidation" Version="11.9.0" />
279.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
280. </ItemGroup><ItemGroup>
281.   <PackageReference Include="FluentValidation" Version="11.9.0" />
282.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
283. </ItemGroup><ItemGroup>
284.   <PackageReference Include="FluentValidation" Version="11.9.0" />
285.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
286. </ItemGroup>var firstOrDefault =<ItemGroup>
287.   <PackageReference Include="FluentValidation" Version="11.9.0" />
288.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
289. </ItemGroup><ItemGroup>
290.   <PackageReference Include="FluentValidation" Version="11.9.0" />
291.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
292. </ItemGroup><ItemGroup>
293.   <PackageReference Include="FluentValidation" Version="11.9.0" />
294.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
295. </ItemGroup><ItemGroup>
296.   <PackageReference Include="FluentValidation" Version="11.9.0" />
297.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
298. </ItemGroup>validateResult.Errors.FirstOrDefault(error => error.PropertyName == columnName);<ItemGroup>
299.   <PackageReference Include="FluentValidation" Version="11.9.0" />
300.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
301. </ItemGroup><ItemGroup>
302.   <PackageReference Include="FluentValidation" Version="11.9.0" />
303.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
304. </ItemGroup><ItemGroup>
305.   <PackageReference Include="FluentValidation" Version="11.9.0" />
306.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
307. </ItemGroup>return firstOrDefault == null ? string.Empty : firstOrDefault.ErrorMessage;<ItemGroup>
308.   <PackageReference Include="FluentValidation" Version="11.9.0" />
309.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
310. </ItemGroup><ItemGroup>
311.   <PackageReference Include="FluentValidation" Version="11.9.0" />
312.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
313. </ItemGroup>}<ItemGroup>
314.   <PackageReference Include="FluentValidation" Version="11.9.0" />
315.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
316. </ItemGroup>}<ItemGroup>
317.   <PackageReference Include="FluentValidation" Version="11.9.0" />
318.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
319. </ItemGroup>public string Error<ItemGroup>
320.   <PackageReference Include="FluentValidation" Version="11.9.0" />
321.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
322. </ItemGroup>{<ItemGroup>
323.   <PackageReference Include="FluentValidation" Version="11.9.0" />
324.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
325. </ItemGroup><ItemGroup>
326.   <PackageReference Include="FluentValidation" Version="11.9.0" />
327.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
328. </ItemGroup>get<ItemGroup>
329.   <PackageReference Include="FluentValidation" Version="11.9.0" />
330.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
331. </ItemGroup><ItemGroup>
332.   <PackageReference Include="FluentValidation" Version="11.9.0" />
333.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
334. </ItemGroup>{<ItemGroup>
335.   <PackageReference Include="FluentValidation" Version="11.9.0" />
336.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
337. </ItemGroup><ItemGroup>
338.   <PackageReference Include="FluentValidation" Version="11.9.0" />
339.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
340. </ItemGroup><ItemGroup>
341.   <PackageReference Include="FluentValidation" Version="11.9.0" />
342.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
343. </ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
344.   <PackageReference Include="FluentValidation" Version="11.9.0" />
345.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
346. </ItemGroup><ItemGroup>
347.   <PackageReference Include="FluentValidation" Version="11.9.0" />
348.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
349. </ItemGroup><ItemGroup>
350.   <PackageReference Include="FluentValidation" Version="11.9.0" />
351.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
352. </ItemGroup>if (validateResult.IsValid)<ItemGroup>
353.   <PackageReference Include="FluentValidation" Version="11.9.0" />
354.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
355. </ItemGroup><ItemGroup>
356.   <PackageReference Include="FluentValidation" Version="11.9.0" />
357.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
358. </ItemGroup><ItemGroup>
359.   <PackageReference Include="FluentValidation" Version="11.9.0" />
360.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
361. </ItemGroup>{<ItemGroup>
362.   <PackageReference Include="FluentValidation" Version="11.9.0" />
363.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
364. </ItemGroup><ItemGroup>
365.   <PackageReference Include="FluentValidation" Version="11.9.0" />
366.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
367. </ItemGroup><ItemGroup>
368.   <PackageReference Include="FluentValidation" Version="11.9.0" />
369.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
370. </ItemGroup><ItemGroup>
371.   <PackageReference Include="FluentValidation" Version="11.9.0" />
372.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
373. </ItemGroup>return string.Empty;<ItemGroup>
374.   <PackageReference Include="FluentValidation" Version="11.9.0" />
375.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
376. </ItemGroup><ItemGroup>
377.   <PackageReference Include="FluentValidation" Version="11.9.0" />
378.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
379. </ItemGroup><ItemGroup>
380.   <PackageReference Include="FluentValidation" Version="11.9.0" />
381.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
382. </ItemGroup>}<ItemGroup>
383.   <PackageReference Include="FluentValidation" Version="11.9.0" />
384.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
385. </ItemGroup><ItemGroup>
386.   <PackageReference Include="FluentValidation" Version="11.9.0" />
387.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
388. </ItemGroup><ItemGroup>
389.   <PackageReference Include="FluentValidation" Version="11.9.0" />
390.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
391. </ItemGroup>var errors = string.Join(Environment.NewLine, validateResult.Errors.Select(x => x.ErrorMessage).ToArray());<ItemGroup>
392.   <PackageReference Include="FluentValidation" Version="11.9.0" />
393.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
394. </ItemGroup><ItemGroup>
395.   <PackageReference Include="FluentValidation" Version="11.9.0" />
396.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
397. </ItemGroup><ItemGroup>
398.   <PackageReference Include="FluentValidation" Version="11.9.0" />
399.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
400. </ItemGroup>return errors;<ItemGroup>
401.   <PackageReference Include="FluentValidation" Version="11.9.0" />
402.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
403. </ItemGroup><ItemGroup>
404.   <PackageReference Include="FluentValidation" Version="11.9.0" />
405.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
406. </ItemGroup>}<ItemGroup>
407.   <PackageReference Include="FluentValidation" Version="11.9.0" />
408.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
409. </ItemGroup>}}

复制代码

上面关键代码在public string this[string columnName]：这里进行输入表单项的数据校验，FluentValidation调用就在这里，校验逻辑封装在StudentValidator，表单输入时会实时调用该处代码，columnName表示表单项的列名，就是View绑定的属性名。
4.2.2. 集合类 - Field

此类用作ViewModel中的集合项使用，模拟动态表单数据校验，简单包含4个属性：字段名称、字段显示名称、数据类型、数据值，表单主要根据数据类型验证输入的数据值是否合法。同样此实体需要继承IDataErrorInfo接口，用于触发FluentValidation验证使用。

1. /// ///<ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup> 扩展字段，用于生成动态表单///<ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup> 继承BindableBase,即继承属性变化接口INotifyPropertyChanged///<ItemGroup>
8.   <PackageReference Include="FluentValidation" Version="11.9.0" />
9.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
10. </ItemGroup> 实现IDataErrorInfo接口，用于FluentValidation验证，必须实现此接口/// public class Field : BindableBase, IDataErrorInfo{<ItemGroup>
11.   <PackageReference Include="FluentValidation" Version="11.9.0" />
12.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
13. </ItemGroup>private string? _value;<ItemGroup>
14.   <PackageReference Include="FluentValidation" Version="11.9.0" />
15.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
16. </ItemGroup>private readonly FieldValidator _validator = new();<ItemGroup>
17.   <PackageReference Include="FluentValidation" Version="11.9.0" />
18.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
19. </ItemGroup>public Field(DataType type, string typeLabel, string name, string value)<ItemGroup>
20.   <PackageReference Include="FluentValidation" Version="11.9.0" />
21.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
22. </ItemGroup>{<ItemGroup>
23.   <PackageReference Include="FluentValidation" Version="11.9.0" />
24.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
25. </ItemGroup><ItemGroup>
26.   <PackageReference Include="FluentValidation" Version="11.9.0" />
27.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
28. </ItemGroup>Type = type;<ItemGroup>
29.   <PackageReference Include="FluentValidation" Version="11.9.0" />
30.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
31. </ItemGroup><ItemGroup>
32.   <PackageReference Include="FluentValidation" Version="11.9.0" />
33.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
34. </ItemGroup>TypeLabel = typeLabel;<ItemGroup>
35.   <PackageReference Include="FluentValidation" Version="11.9.0" />
36.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
37. </ItemGroup><ItemGroup>
38.   <PackageReference Include="FluentValidation" Version="11.9.0" />
39.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
40. </ItemGroup>Name = name;<ItemGroup>
41.   <PackageReference Include="FluentValidation" Version="11.9.0" />
42.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
43. </ItemGroup><ItemGroup>
44.   <PackageReference Include="FluentValidation" Version="11.9.0" />
45.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
46. </ItemGroup>Value = value;<ItemGroup>
47.   <PackageReference Include="FluentValidation" Version="11.9.0" />
48.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
49. </ItemGroup>}<ItemGroup>
50.   <PackageReference Include="FluentValidation" Version="11.9.0" />
51.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
52. </ItemGroup>///<ItemGroup>
53.   <PackageReference Include="FluentValidation" Version="11.9.0" />
54.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
55. </ItemGroup> ///<ItemGroup>
56.   <PackageReference Include="FluentValidation" Version="11.9.0" />
57.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
58. </ItemGroup> 数据类型<ItemGroup>
59.   <PackageReference Include="FluentValidation" Version="11.9.0" />
60.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
61. </ItemGroup>///<ItemGroup>
62.   <PackageReference Include="FluentValidation" Version="11.9.0" />
63.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
64. </ItemGroup> public DataType Type { get; set; }<ItemGroup>
65.   <PackageReference Include="FluentValidation" Version="11.9.0" />
66.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
67. </ItemGroup>///<ItemGroup>
68.   <PackageReference Include="FluentValidation" Version="11.9.0" />
69.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
70. </ItemGroup> ///<ItemGroup>
71.   <PackageReference Include="FluentValidation" Version="11.9.0" />
72.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
73. </ItemGroup> 数据类型名称<ItemGroup>
74.   <PackageReference Include="FluentValidation" Version="11.9.0" />
75.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
76. </ItemGroup>///<ItemGroup>
77.   <PackageReference Include="FluentValidation" Version="11.9.0" />
78.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
79. </ItemGroup> public string TypeLabel { get; set; }<ItemGroup>
80.   <PackageReference Include="FluentValidation" Version="11.9.0" />
81.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
82. </ItemGroup>///<ItemGroup>
83.   <PackageReference Include="FluentValidation" Version="11.9.0" />
84.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
85. </ItemGroup> ///<ItemGroup>
86.   <PackageReference Include="FluentValidation" Version="11.9.0" />
87.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
88. </ItemGroup> 名称<ItemGroup>
89.   <PackageReference Include="FluentValidation" Version="11.9.0" />
90.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
91. </ItemGroup>///<ItemGroup>
92.   <PackageReference Include="FluentValidation" Version="11.9.0" />
93.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
94. </ItemGroup> public string Name { get; set; }<ItemGroup>
95.   <PackageReference Include="FluentValidation" Version="11.9.0" />
96.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
97. </ItemGroup>///<ItemGroup>
98.   <PackageReference Include="FluentValidation" Version="11.9.0" />
99.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
100. </ItemGroup> ///<ItemGroup>
101.   <PackageReference Include="FluentValidation" Version="11.9.0" />
102.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
103. </ItemGroup> 值<ItemGroup>
104.   <PackageReference Include="FluentValidation" Version="11.9.0" />
105.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
106. </ItemGroup>///<ItemGroup>
107.   <PackageReference Include="FluentValidation" Version="11.9.0" />
108.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
109. </ItemGroup> public string? Value<ItemGroup>
110.   <PackageReference Include="FluentValidation" Version="11.9.0" />
111.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
112. </ItemGroup>{<ItemGroup>
113.   <PackageReference Include="FluentValidation" Version="11.9.0" />
114.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
115. </ItemGroup><ItemGroup>
116.   <PackageReference Include="FluentValidation" Version="11.9.0" />
117.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
118. </ItemGroup>get => _value;<ItemGroup>
119.   <PackageReference Include="FluentValidation" Version="11.9.0" />
120.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
121. </ItemGroup><ItemGroup>
122.   <PackageReference Include="FluentValidation" Version="11.9.0" />
123.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
124. </ItemGroup>set => SetProperty(ref _value, value);<ItemGroup>
125.   <PackageReference Include="FluentValidation" Version="11.9.0" />
126.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
127. </ItemGroup>}<ItemGroup>
128.   <PackageReference Include="FluentValidation" Version="11.9.0" />
129.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
130. </ItemGroup>public string this[string columnName]<ItemGroup>
131.   <PackageReference Include="FluentValidation" Version="11.9.0" />
132.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
133. </ItemGroup>{<ItemGroup>
134.   <PackageReference Include="FluentValidation" Version="11.9.0" />
135.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
136. </ItemGroup><ItemGroup>
137.   <PackageReference Include="FluentValidation" Version="11.9.0" />
138.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
139. </ItemGroup>get<ItemGroup>
140.   <PackageReference Include="FluentValidation" Version="11.9.0" />
141.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
142. </ItemGroup><ItemGroup>
143.   <PackageReference Include="FluentValidation" Version="11.9.0" />
144.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
145. </ItemGroup>{<ItemGroup>
146.   <PackageReference Include="FluentValidation" Version="11.9.0" />
147.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
148. </ItemGroup><ItemGroup>
149.   <PackageReference Include="FluentValidation" Version="11.9.0" />
150.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
151. </ItemGroup><ItemGroup>
152.   <PackageReference Include="FluentValidation" Version="11.9.0" />
153.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
154. </ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
155.   <PackageReference Include="FluentValidation" Version="11.9.0" />
156.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
157. </ItemGroup><ItemGroup>
158.   <PackageReference Include="FluentValidation" Version="11.9.0" />
159.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
160. </ItemGroup><ItemGroup>
161.   <PackageReference Include="FluentValidation" Version="11.9.0" />
162.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
163. </ItemGroup>if (validateResult.IsValid)<ItemGroup>
164.   <PackageReference Include="FluentValidation" Version="11.9.0" />
165.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
166. </ItemGroup><ItemGroup>
167.   <PackageReference Include="FluentValidation" Version="11.9.0" />
168.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
169. </ItemGroup><ItemGroup>
170.   <PackageReference Include="FluentValidation" Version="11.9.0" />
171.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
172. </ItemGroup>{<ItemGroup>
173.   <PackageReference Include="FluentValidation" Version="11.9.0" />
174.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
175. </ItemGroup><ItemGroup>
176.   <PackageReference Include="FluentValidation" Version="11.9.0" />
177.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
178. </ItemGroup><ItemGroup>
179.   <PackageReference Include="FluentValidation" Version="11.9.0" />
180.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
181. </ItemGroup><ItemGroup>
182.   <PackageReference Include="FluentValidation" Version="11.9.0" />
183.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
184. </ItemGroup>return string.Empty;<ItemGroup>
185.   <PackageReference Include="FluentValidation" Version="11.9.0" />
186.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
187. </ItemGroup><ItemGroup>
188.   <PackageReference Include="FluentValidation" Version="11.9.0" />
189.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
190. </ItemGroup><ItemGroup>
191.   <PackageReference Include="FluentValidation" Version="11.9.0" />
192.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
193. </ItemGroup>}<ItemGroup>
194.   <PackageReference Include="FluentValidation" Version="11.9.0" />
195.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
196. </ItemGroup><ItemGroup>
197.   <PackageReference Include="FluentValidation" Version="11.9.0" />
198.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
199. </ItemGroup><ItemGroup>
200.   <PackageReference Include="FluentValidation" Version="11.9.0" />
201.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
202. </ItemGroup>var firstOrDefault =<ItemGroup>
203.   <PackageReference Include="FluentValidation" Version="11.9.0" />
204.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
205. </ItemGroup><ItemGroup>
206.   <PackageReference Include="FluentValidation" Version="11.9.0" />
207.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
208. </ItemGroup><ItemGroup>
209.   <PackageReference Include="FluentValidation" Version="11.9.0" />
210.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
211. </ItemGroup><ItemGroup>
212.   <PackageReference Include="FluentValidation" Version="11.9.0" />
213.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
214. </ItemGroup>validateResult.Errors.FirstOrDefault(error => error.PropertyName == columnName);<ItemGroup>
215.   <PackageReference Include="FluentValidation" Version="11.9.0" />
216.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
217. </ItemGroup><ItemGroup>
218.   <PackageReference Include="FluentValidation" Version="11.9.0" />
219.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
220. </ItemGroup><ItemGroup>
221.   <PackageReference Include="FluentValidation" Version="11.9.0" />
222.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
223. </ItemGroup>return firstOrDefault == null ? string.Empty : firstOrDefault.ErrorMessage;<ItemGroup>
224.   <PackageReference Include="FluentValidation" Version="11.9.0" />
225.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
226. </ItemGroup><ItemGroup>
227.   <PackageReference Include="FluentValidation" Version="11.9.0" />
228.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
229. </ItemGroup>}<ItemGroup>
230.   <PackageReference Include="FluentValidation" Version="11.9.0" />
231.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
232. </ItemGroup>}<ItemGroup>
233.   <PackageReference Include="FluentValidation" Version="11.9.0" />
234.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
235. </ItemGroup>public string Error<ItemGroup>
236.   <PackageReference Include="FluentValidation" Version="11.9.0" />
237.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
238. </ItemGroup>{<ItemGroup>
239.   <PackageReference Include="FluentValidation" Version="11.9.0" />
240.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
241. </ItemGroup><ItemGroup>
242.   <PackageReference Include="FluentValidation" Version="11.9.0" />
243.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
244. </ItemGroup>get<ItemGroup>
245.   <PackageReference Include="FluentValidation" Version="11.9.0" />
246.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
247. </ItemGroup><ItemGroup>
248.   <PackageReference Include="FluentValidation" Version="11.9.0" />
249.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
250. </ItemGroup>{<ItemGroup>
251.   <PackageReference Include="FluentValidation" Version="11.9.0" />
252.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
253. </ItemGroup><ItemGroup>
254.   <PackageReference Include="FluentValidation" Version="11.9.0" />
255.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
256. </ItemGroup><ItemGroup>
257.   <PackageReference Include="FluentValidation" Version="11.9.0" />
258.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
259. </ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
260.   <PackageReference Include="FluentValidation" Version="11.9.0" />
261.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
262. </ItemGroup><ItemGroup>
263.   <PackageReference Include="FluentValidation" Version="11.9.0" />
264.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
265. </ItemGroup><ItemGroup>
266.   <PackageReference Include="FluentValidation" Version="11.9.0" />
267.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
268. </ItemGroup>if (validateResult.IsValid)<ItemGroup>
269.   <PackageReference Include="FluentValidation" Version="11.9.0" />
270.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
271. </ItemGroup><ItemGroup>
272.   <PackageReference Include="FluentValidation" Version="11.9.0" />
273.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
274. </ItemGroup><ItemGroup>
275.   <PackageReference Include="FluentValidation" Version="11.9.0" />
276.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
277. </ItemGroup>{<ItemGroup>
278.   <PackageReference Include="FluentValidation" Version="11.9.0" />
279.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
280. </ItemGroup><ItemGroup>
281.   <PackageReference Include="FluentValidation" Version="11.9.0" />
282.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
283. </ItemGroup><ItemGroup>
284.   <PackageReference Include="FluentValidation" Version="11.9.0" />
285.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
286. </ItemGroup><ItemGroup>
287.   <PackageReference Include="FluentValidation" Version="11.9.0" />
288.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
289. </ItemGroup>return string.Empty;<ItemGroup>
290.   <PackageReference Include="FluentValidation" Version="11.9.0" />
291.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
292. </ItemGroup><ItemGroup>
293.   <PackageReference Include="FluentValidation" Version="11.9.0" />
294.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
295. </ItemGroup><ItemGroup>
296.   <PackageReference Include="FluentValidation" Version="11.9.0" />
297.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
298. </ItemGroup>}<ItemGroup>
299.   <PackageReference Include="FluentValidation" Version="11.9.0" />
300.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
301. </ItemGroup><ItemGroup>
302.   <PackageReference Include="FluentValidation" Version="11.9.0" />
303.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
304. </ItemGroup><ItemGroup>
305.   <PackageReference Include="FluentValidation" Version="11.9.0" />
306.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
307. </ItemGroup>var errors = string.Join(Environment.NewLine, validateResult.Errors.Select(x => x.ErrorMessage).ToArray());<ItemGroup>
308.   <PackageReference Include="FluentValidation" Version="11.9.0" />
309.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
310. </ItemGroup><ItemGroup>
311.   <PackageReference Include="FluentValidation" Version="11.9.0" />
312.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
313. </ItemGroup><ItemGroup>
314.   <PackageReference Include="FluentValidation" Version="11.9.0" />
315.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
316. </ItemGroup>return errors;<ItemGroup>
317.   <PackageReference Include="FluentValidation" Version="11.9.0" />
318.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
319. </ItemGroup><ItemGroup>
320.   <PackageReference Include="FluentValidation" Version="11.9.0" />
321.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
322. </ItemGroup>}<ItemGroup>
323.   <PackageReference Include="FluentValidation" Version="11.9.0" />
324.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
325. </ItemGroup>}}public enum DataType{<ItemGroup>
326.   <PackageReference Include="FluentValidation" Version="11.9.0" />
327.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
328. </ItemGroup>Text,<ItemGroup>
329.   <PackageReference Include="FluentValidation" Version="11.9.0" />
330.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
331. </ItemGroup>Number,<ItemGroup>
332.   <PackageReference Include="FluentValidation" Version="11.9.0" />
333.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
334. </ItemGroup>Date}

复制代码

看上面代码，public string this[string columnName]代码处写法和Student类一样，只是_validator变量类型不同，前者为StudentValidator，这里是FieldValidator，下面我们看看这两个类怎么写。
4.3. 创建验证器

对于每个实体类，我都创建了一个对应的验证器类：StudentValidator和FieldValidator。这些验证器类继承自AbstractValidator，并在其中定义了验证规则。验证属性的写法有两种：

• 可以在实体属性上方添加特性（本文不作特别说明，百度文章介绍很多）；
  
• 通过代码的形式添加，如下方，创建一个验证器类，继承自AbstractValidator，在此验证器构造函数中写规则验证属性，方便管理。
  

本文使用第二种，下面通过创建StudentValidator和FieldValidator两个验证器类介绍。
4.3.1. StudentValidator

这是学生验证器StudentValidator，需要继承AbstractValidator，泛型指定前面需要验证的实体类Student：

1. public class StudentValidator : AbstractValidator{<ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup>public StudentValidator()<ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup>{<ItemGroup>
8.   <PackageReference Include="FluentValidation" Version="11.9.0" />
9.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
10. </ItemGroup><ItemGroup>
11.   <PackageReference Include="FluentValidation" Version="11.9.0" />
12.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
13. </ItemGroup>RuleFor(vm => vm.Name)<ItemGroup>
14.   <PackageReference Include="FluentValidation" Version="11.9.0" />
15.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
16. </ItemGroup><ItemGroup>
17.   <PackageReference Include="FluentValidation" Version="11.9.0" />
18.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
19. </ItemGroup><ItemGroup>
20.   <PackageReference Include="FluentValidation" Version="11.9.0" />
21.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
22. </ItemGroup>.NotEmpty()<ItemGroup>
23.   <PackageReference Include="FluentValidation" Version="11.9.0" />
24.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
25. </ItemGroup><ItemGroup>
26.   <PackageReference Include="FluentValidation" Version="11.9.0" />
27.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
28. </ItemGroup><ItemGroup>
29.   <PackageReference Include="FluentValidation" Version="11.9.0" />
30.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
31. </ItemGroup>.WithMessage("请输入学生姓名！")<ItemGroup>
32.   <PackageReference Include="FluentValidation" Version="11.9.0" />
33.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
34. </ItemGroup><ItemGroup>
35.   <PackageReference Include="FluentValidation" Version="11.9.0" />
36.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
37. </ItemGroup><ItemGroup>
38.   <PackageReference Include="FluentValidation" Version="11.9.0" />
39.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
40. </ItemGroup>.Length(5, 30)<ItemGroup>
41.   <PackageReference Include="FluentValidation" Version="11.9.0" />
42.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
43. </ItemGroup><ItemGroup>
44.   <PackageReference Include="FluentValidation" Version="11.9.0" />
45.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
46. </ItemGroup><ItemGroup>
47.   <PackageReference Include="FluentValidation" Version="11.9.0" />
48.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
49. </ItemGroup>.WithMessage("学生姓名长度限制在5到30个字符之间！");<ItemGroup>
50.   <PackageReference Include="FluentValidation" Version="11.9.0" />
51.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
52. </ItemGroup><ItemGroup>
53.   <PackageReference Include="FluentValidation" Version="11.9.0" />
54.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
55. </ItemGroup>RuleFor(vm => vm.Age)<ItemGroup>
56.   <PackageReference Include="FluentValidation" Version="11.9.0" />
57.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
58. </ItemGroup><ItemGroup>
59.   <PackageReference Include="FluentValidation" Version="11.9.0" />
60.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
61. </ItemGroup><ItemGroup>
62.   <PackageReference Include="FluentValidation" Version="11.9.0" />
63.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
64. </ItemGroup>.GreaterThanOrEqualTo(0)<ItemGroup>
65.   <PackageReference Include="FluentValidation" Version="11.9.0" />
66.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
67. </ItemGroup><ItemGroup>
68.   <PackageReference Include="FluentValidation" Version="11.9.0" />
69.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
70. </ItemGroup><ItemGroup>
71.   <PackageReference Include="FluentValidation" Version="11.9.0" />
72.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
73. </ItemGroup>.WithMessage("学生年龄为整数！")<ItemGroup>
74.   <PackageReference Include="FluentValidation" Version="11.9.0" />
75.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
76. </ItemGroup><ItemGroup>
77.   <PackageReference Include="FluentValidation" Version="11.9.0" />
78.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
79. </ItemGroup><ItemGroup>
80.   <PackageReference Include="FluentValidation" Version="11.9.0" />
81.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
82. </ItemGroup>.ExclusiveBetween(10, 150)<ItemGroup>
83.   <PackageReference Include="FluentValidation" Version="11.9.0" />
84.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
85. </ItemGroup><ItemGroup>
86.   <PackageReference Include="FluentValidation" Version="11.9.0" />
87.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
88. </ItemGroup><ItemGroup>
89.   <PackageReference Include="FluentValidation" Version="11.9.0" />
90.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
91. </ItemGroup>.WithMessage("请正确输入学生年龄(10-150)");<ItemGroup>
92.   <PackageReference Include="FluentValidation" Version="11.9.0" />
93.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
94. </ItemGroup><ItemGroup>
95.   <PackageReference Include="FluentValidation" Version="11.9.0" />
96.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
97. </ItemGroup>_ = RuleFor(vm => vm.Zip)<ItemGroup>
98.   <PackageReference Include="FluentValidation" Version="11.9.0" />
99.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
100. </ItemGroup><ItemGroup>
101.   <PackageReference Include="FluentValidation" Version="11.9.0" />
102.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
103. </ItemGroup><ItemGroup>
104.   <PackageReference Include="FluentValidation" Version="11.9.0" />
105.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
106. </ItemGroup>.NotEmpty()<ItemGroup>
107.   <PackageReference Include="FluentValidation" Version="11.9.0" />
108.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
109. </ItemGroup><ItemGroup>
110.   <PackageReference Include="FluentValidation" Version="11.9.0" />
111.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
112. </ItemGroup><ItemGroup>
113.   <PackageReference Include="FluentValidation" Version="11.9.0" />
114.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
115. </ItemGroup>.WithMessage("邮政编码不能为空！")<ItemGroup>
116.   <PackageReference Include="FluentValidation" Version="11.9.0" />
117.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
118. </ItemGroup><ItemGroup>
119.   <PackageReference Include="FluentValidation" Version="11.9.0" />
120.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
121. </ItemGroup><ItemGroup>
122.   <PackageReference Include="FluentValidation" Version="11.9.0" />
123.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
124. </ItemGroup>.Must(BeAValidZip)<ItemGroup>
125.   <PackageReference Include="FluentValidation" Version="11.9.0" />
126.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
127. </ItemGroup><ItemGroup>
128.   <PackageReference Include="FluentValidation" Version="11.9.0" />
129.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
130. </ItemGroup><ItemGroup>
131.   <PackageReference Include="FluentValidation" Version="11.9.0" />
132.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
133. </ItemGroup>.WithMessage("邮政编码由六位数字组成。");<ItemGroup>
134.   <PackageReference Include="FluentValidation" Version="11.9.0" />
135.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
136. </ItemGroup><ItemGroup>
137.   <PackageReference Include="FluentValidation" Version="11.9.0" />
138.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
139. </ItemGroup>RuleFor(model => model.MinValue).Must((model, minValue) => minValue < model.MaxValue).WithMessage("最小值应该小于最大值");<ItemGroup>
140.   <PackageReference Include="FluentValidation" Version="11.9.0" />
141.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
142. </ItemGroup><ItemGroup>
143.   <PackageReference Include="FluentValidation" Version="11.9.0" />
144.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
145. </ItemGroup>RuleFor(model => model.MaxValue).Must((model, maxValue) => maxValue > model.MinValue).WithMessage("最大值应该大于最小值");<ItemGroup>
146.   <PackageReference Include="FluentValidation" Version="11.9.0" />
147.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
148. </ItemGroup>}<ItemGroup>
149.   <PackageReference Include="FluentValidation" Version="11.9.0" />
150.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
151. </ItemGroup>private static bool BeAValidZip(string? zip)<ItemGroup>
152.   <PackageReference Include="FluentValidation" Version="11.9.0" />
153.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
154. </ItemGroup>{<ItemGroup>
155.   <PackageReference Include="FluentValidation" Version="11.9.0" />
156.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
157. </ItemGroup><ItemGroup>
158.   <PackageReference Include="FluentValidation" Version="11.9.0" />
159.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
160. </ItemGroup>if (string.IsNullOrEmpty(zip))<ItemGroup>
161.   <PackageReference Include="FluentValidation" Version="11.9.0" />
162.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
163. </ItemGroup><ItemGroup>
164.   <PackageReference Include="FluentValidation" Version="11.9.0" />
165.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
166. </ItemGroup>{<ItemGroup>
167.   <PackageReference Include="FluentValidation" Version="11.9.0" />
168.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
169. </ItemGroup><ItemGroup>
170.   <PackageReference Include="FluentValidation" Version="11.9.0" />
171.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
172. </ItemGroup><ItemGroup>
173.   <PackageReference Include="FluentValidation" Version="11.9.0" />
174.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
175. </ItemGroup>return false;<ItemGroup>
176.   <PackageReference Include="FluentValidation" Version="11.9.0" />
177.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
178. </ItemGroup><ItemGroup>
179.   <PackageReference Include="FluentValidation" Version="11.9.0" />
180.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
181. </ItemGroup>}<ItemGroup>
182.   <PackageReference Include="FluentValidation" Version="11.9.0" />
183.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
184. </ItemGroup><ItemGroup>
185.   <PackageReference Include="FluentValidation" Version="11.9.0" />
186.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
187. </ItemGroup>var regex = new Regex(@"\d{6}");<ItemGroup>
188.   <PackageReference Include="FluentValidation" Version="11.9.0" />
189.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
190. </ItemGroup><ItemGroup>
191.   <PackageReference Include="FluentValidation" Version="11.9.0" />
192.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
193. </ItemGroup>return regex.IsMatch(zip);<ItemGroup>
194.   <PackageReference Include="FluentValidation" Version="11.9.0" />
195.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
196. </ItemGroup>}}

复制代码

代码简单，使用到数字的大小和范围验证（见Age）、字符串不能为空和长度限制（见Name）、字符串正则表达式验证（见Zip）、多属性关联验证（最小值和最大值，这里配合属性set时通知其他属性验证通知RaisePropertyChanged(nameof(MaxValue));）。
4.3.2. FieldValidator

动态表单数据值校验器，同理需要继承AbstractValidator，泛型指定前面需要验证的实体类Field：：

1. public class FieldValidator : AbstractValidator{<ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup>public FieldValidator()<ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup>{<ItemGroup>
8.   <PackageReference Include="FluentValidation" Version="11.9.0" />
9.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
10. </ItemGroup><ItemGroup>
11.   <PackageReference Include="FluentValidation" Version="11.9.0" />
12.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
13. </ItemGroup>RuleFor(field => field.Value)<ItemGroup>
14.   <PackageReference Include="FluentValidation" Version="11.9.0" />
15.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
16. </ItemGroup><ItemGroup>
17.   <PackageReference Include="FluentValidation" Version="11.9.0" />
18.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
19. </ItemGroup><ItemGroup>
20.   <PackageReference Include="FluentValidation" Version="11.9.0" />
21.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
22. </ItemGroup>.Must((field, value) => (field.Type == DataType.Text && !string.IsNullOrWhiteSpace(value))<ItemGroup>
23.   <PackageReference Include="FluentValidation" Version="11.9.0" />
24.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
25. </ItemGroup><ItemGroup>
26.   <PackageReference Include="FluentValidation" Version="11.9.0" />
27.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
28. </ItemGroup><ItemGroup>
29.   <PackageReference Include="FluentValidation" Version="11.9.0" />
30.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
31. </ItemGroup><ItemGroup>
32.   <PackageReference Include="FluentValidation" Version="11.9.0" />
33.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
34. </ItemGroup><ItemGroup>
35.   <PackageReference Include="FluentValidation" Version="11.9.0" />
36.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
37. </ItemGroup><ItemGroup>
38.   <PackageReference Include="FluentValidation" Version="11.9.0" />
39.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
40. </ItemGroup><ItemGroup>
41.   <PackageReference Include="FluentValidation" Version="11.9.0" />
42.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
43. </ItemGroup><ItemGroup>
44.   <PackageReference Include="FluentValidation" Version="11.9.0" />
45.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
46. </ItemGroup><ItemGroup>
47.   <PackageReference Include="FluentValidation" Version="11.9.0" />
48.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
49. </ItemGroup>|| (field.Type == DataType.Number && double.TryParse(value, out _))<ItemGroup>
50.   <PackageReference Include="FluentValidation" Version="11.9.0" />
51.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
52. </ItemGroup><ItemGroup>
53.   <PackageReference Include="FluentValidation" Version="11.9.0" />
54.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
55. </ItemGroup><ItemGroup>
56.   <PackageReference Include="FluentValidation" Version="11.9.0" />
57.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
58. </ItemGroup><ItemGroup>
59.   <PackageReference Include="FluentValidation" Version="11.9.0" />
60.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
61. </ItemGroup><ItemGroup>
62.   <PackageReference Include="FluentValidation" Version="11.9.0" />
63.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
64. </ItemGroup><ItemGroup>
65.   <PackageReference Include="FluentValidation" Version="11.9.0" />
66.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
67. </ItemGroup><ItemGroup>
68.   <PackageReference Include="FluentValidation" Version="11.9.0" />
69.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
70. </ItemGroup><ItemGroup>
71.   <PackageReference Include="FluentValidation" Version="11.9.0" />
72.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
73. </ItemGroup><ItemGroup>
74.   <PackageReference Include="FluentValidation" Version="11.9.0" />
75.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
76. </ItemGroup>|| (field.Type == DataType.Date && DateTime.TryParse(value, out _)))<ItemGroup>
77.   <PackageReference Include="FluentValidation" Version="11.9.0" />
78.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
79. </ItemGroup><ItemGroup>
80.   <PackageReference Include="FluentValidation" Version="11.9.0" />
81.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
82. </ItemGroup><ItemGroup>
83.   <PackageReference Include="FluentValidation" Version="11.9.0" />
84.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
85. </ItemGroup>.WithMessage("1.文本不能为空；2.数字类型请填写数字；3.日志类型请填写日期类型");<ItemGroup>
86.   <PackageReference Include="FluentValidation" Version="11.9.0" />
87.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
88. </ItemGroup>}}

复制代码

这里写的简单了点：

• 文本数据类型，值不能为空；
  
• 数字数据类型，必须是double类型；
  
• 日期类型，必须能使用DateTime转换；
  

本文只做简单演示，多种数据类型放Must方法中做统一验证，验证出错给出统一的提示信息，读者可按实际情况修改。
4.3.3. StudentViewModelValidator

此外，我还创建了一个StudentViewModelValidator，用于验证ViewModel层的属性。这个验证器能够处理基本数据类型、对象属性以及集合属性的验证。

1. public class StudentViewModelValidator : AbstractValidator{<ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup>public StudentViewModelValidator()<ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup>{<ItemGroup>
8.   <PackageReference Include="FluentValidation" Version="11.9.0" />
9.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
10. </ItemGroup><ItemGroup>
11.   <PackageReference Include="FluentValidation" Version="11.9.0" />
12.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
13. </ItemGroup>RuleFor(vm => vm.Title)<ItemGroup>
14.   <PackageReference Include="FluentValidation" Version="11.9.0" />
15.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
16. </ItemGroup><ItemGroup>
17.   <PackageReference Include="FluentValidation" Version="11.9.0" />
18.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
19. </ItemGroup><ItemGroup>
20.   <PackageReference Include="FluentValidation" Version="11.9.0" />
21.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
22. </ItemGroup>.NotEmpty()<ItemGroup>
23.   <PackageReference Include="FluentValidation" Version="11.9.0" />
24.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
25. </ItemGroup><ItemGroup>
26.   <PackageReference Include="FluentValidation" Version="11.9.0" />
27.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
28. </ItemGroup><ItemGroup>
29.   <PackageReference Include="FluentValidation" Version="11.9.0" />
30.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
31. </ItemGroup>.WithMessage("标题长度不能为空！")<ItemGroup>
32.   <PackageReference Include="FluentValidation" Version="11.9.0" />
33.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
34. </ItemGroup><ItemGroup>
35.   <PackageReference Include="FluentValidation" Version="11.9.0" />
36.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
37. </ItemGroup><ItemGroup>
38.   <PackageReference Include="FluentValidation" Version="11.9.0" />
39.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
40. </ItemGroup>.Length(5, 30)<ItemGroup>
41.   <PackageReference Include="FluentValidation" Version="11.9.0" />
42.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
43. </ItemGroup><ItemGroup>
44.   <PackageReference Include="FluentValidation" Version="11.9.0" />
45.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
46. </ItemGroup><ItemGroup>
47.   <PackageReference Include="FluentValidation" Version="11.9.0" />
48.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
49. </ItemGroup>.WithMessage("标题长度限制在5到30个字符之间！");<ItemGroup>
50.   <PackageReference Include="FluentValidation" Version="11.9.0" />
51.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
52. </ItemGroup><ItemGroup>
53.   <PackageReference Include="FluentValidation" Version="11.9.0" />
54.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
55. </ItemGroup>RuleFor(vm => vm.CurrentStudent).SetValidator(new StudentValidator());<ItemGroup>
56.   <PackageReference Include="FluentValidation" Version="11.9.0" />
57.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
58. </ItemGroup><ItemGroup>
59.   <PackageReference Include="FluentValidation" Version="11.9.0" />
60.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
61. </ItemGroup>RuleForEach(vm => vm.Fields).SetValidator(new FieldValidator());<ItemGroup>
62.   <PackageReference Include="FluentValidation" Version="11.9.0" />
63.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
64. </ItemGroup>}}

复制代码

• Title用于关联验证基本数据类型(string类型)；
  
• CurrentStudent用于验证对象属性（Student类的实例），设置验证该属性时使用StudentValidator验证器；
  
• Fields用于验证集合属性(ObservableCollection)，设置验证该属性子项时使用FieldValidator验证器，注意前面使用的RuleForEach表示关联集合中的项验证器。
  

4.4. ViewModel层实现

StudentViewModel与Student实体类结构类似，都需要实现IDataErrorInfo接口，该类由一个简单的string属性(Title)和一个复杂的Student对象属性(CurrentStudent)、集合属性ObservableCollection Fields组成，代码如下：

1. /// ///<ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup> 视图ViewModel///<ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup> 继承BindableBase,即继承属性变化接口INotifyPropertyChanged///<ItemGroup>
8.   <PackageReference Include="FluentValidation" Version="11.9.0" />
9.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
10. </ItemGroup> 实现IDataErrorInfo接口，用于FluentValidation验证，必须实现此接口/// public class StudentViewModel : BindableBase, IDataErrorInfo{<ItemGroup>
11.   <PackageReference Include="FluentValidation" Version="11.9.0" />
12.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
13. </ItemGroup>private Student _currentStudent;<ItemGroup>
14.   <PackageReference Include="FluentValidation" Version="11.9.0" />
15.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
16. </ItemGroup>private string _title;<ItemGroup>
17.   <PackageReference Include="FluentValidation" Version="11.9.0" />
18.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
19. </ItemGroup>private readonly StudentViewModelValidator _validator;<ItemGroup>
20.   <PackageReference Include="FluentValidation" Version="11.9.0" />
21.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
22. </ItemGroup>public string Title<ItemGroup>
23.   <PackageReference Include="FluentValidation" Version="11.9.0" />
24.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
25. </ItemGroup>{<ItemGroup>
26.   <PackageReference Include="FluentValidation" Version="11.9.0" />
27.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
28. </ItemGroup><ItemGroup>
29.   <PackageReference Include="FluentValidation" Version="11.9.0" />
30.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
31. </ItemGroup>get => _title;<ItemGroup>
32.   <PackageReference Include="FluentValidation" Version="11.9.0" />
33.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
34. </ItemGroup><ItemGroup>
35.   <PackageReference Include="FluentValidation" Version="11.9.0" />
36.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
37. </ItemGroup>set => SetProperty(ref _title, value);<ItemGroup>
38.   <PackageReference Include="FluentValidation" Version="11.9.0" />
39.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
40. </ItemGroup>}<ItemGroup>
41.   <PackageReference Include="FluentValidation" Version="11.9.0" />
42.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
43. </ItemGroup>public Student CurrentStudent<ItemGroup>
44.   <PackageReference Include="FluentValidation" Version="11.9.0" />
45.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
46. </ItemGroup>{<ItemGroup>
47.   <PackageReference Include="FluentValidation" Version="11.9.0" />
48.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
49. </ItemGroup><ItemGroup>
50.   <PackageReference Include="FluentValidation" Version="11.9.0" />
51.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
52. </ItemGroup>get => _currentStudent;<ItemGroup>
53.   <PackageReference Include="FluentValidation" Version="11.9.0" />
54.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
55. </ItemGroup><ItemGroup>
56.   <PackageReference Include="FluentValidation" Version="11.9.0" />
57.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
58. </ItemGroup>set => SetProperty(ref _currentStudent, value);<ItemGroup>
59.   <PackageReference Include="FluentValidation" Version="11.9.0" />
60.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
61. </ItemGroup>}<ItemGroup>
62.   <PackageReference Include="FluentValidation" Version="11.9.0" />
63.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
64. </ItemGroup>public ObservableCollection Fields { get; } = new();<ItemGroup>
65.   <PackageReference Include="FluentValidation" Version="11.9.0" />
66.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
67. </ItemGroup>private DelegateCommand _saveCommand;<ItemGroup>
68.   <PackageReference Include="FluentValidation" Version="11.9.0" />
69.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
70. </ItemGroup>public DelegateCommand SaveCommand => _saveCommand ??= new DelegateCommand(HandleSaveCommand,<ItemGroup>
71.   <PackageReference Include="FluentValidation" Version="11.9.0" />
72.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
73. </ItemGroup><ItemGroup>
74.   <PackageReference Include="FluentValidation" Version="11.9.0" />
75.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
76. </ItemGroup>HandleCanExecuteSaveCommand);<ItemGroup>
77.   <PackageReference Include="FluentValidation" Version="11.9.0" />
78.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
79. </ItemGroup>private DelegateCommand _cancelCommand;<ItemGroup>
80.   <PackageReference Include="FluentValidation" Version="11.9.0" />
81.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
82. </ItemGroup>public DelegateCommand CancelCommand =><ItemGroup>
83.   <PackageReference Include="FluentValidation" Version="11.9.0" />
84.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
85. </ItemGroup><ItemGroup>
86.   <PackageReference Include="FluentValidation" Version="11.9.0" />
87.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
88. </ItemGroup>_cancelCommand ??= new DelegateCommand(HandleCancelCommand, () => true);<ItemGroup>
89.   <PackageReference Include="FluentValidation" Version="11.9.0" />
90.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
91. </ItemGroup>public StudentViewModel()<ItemGroup>
92.   <PackageReference Include="FluentValidation" Version="11.9.0" />
93.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
94. </ItemGroup>{<ItemGroup>
95.   <PackageReference Include="FluentValidation" Version="11.9.0" />
96.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
97. </ItemGroup><ItemGroup>
98.   <PackageReference Include="FluentValidation" Version="11.9.0" />
99.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
100. </ItemGroup>_validator = new StudentViewModelValidator();<ItemGroup>
101.   <PackageReference Include="FluentValidation" Version="11.9.0" />
102.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
103. </ItemGroup><ItemGroup>
104.   <PackageReference Include="FluentValidation" Version="11.9.0" />
105.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
106. </ItemGroup>CurrentStudent = new Student<ItemGroup>
107.   <PackageReference Include="FluentValidation" Version="11.9.0" />
108.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
109. </ItemGroup><ItemGroup>
110.   <PackageReference Include="FluentValidation" Version="11.9.0" />
111.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
112. </ItemGroup>{<ItemGroup>
113.   <PackageReference Include="FluentValidation" Version="11.9.0" />
114.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
115. </ItemGroup><ItemGroup>
116.   <PackageReference Include="FluentValidation" Version="11.9.0" />
117.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
118. </ItemGroup><ItemGroup>
119.   <PackageReference Include="FluentValidation" Version="11.9.0" />
120.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
121. </ItemGroup>Name = "李刚的儿",<ItemGroup>
122.   <PackageReference Include="FluentValidation" Version="11.9.0" />
123.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
124. </ItemGroup><ItemGroup>
125.   <PackageReference Include="FluentValidation" Version="11.9.0" />
126.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
127. </ItemGroup><ItemGroup>
128.   <PackageReference Include="FluentValidation" Version="11.9.0" />
129.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
130. </ItemGroup>Age = 23<ItemGroup>
131.   <PackageReference Include="FluentValidation" Version="11.9.0" />
132.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
133. </ItemGroup><ItemGroup>
134.   <PackageReference Include="FluentValidation" Version="11.9.0" />
135.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
136. </ItemGroup>};<ItemGroup>
137.   <PackageReference Include="FluentValidation" Version="11.9.0" />
138.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
139. </ItemGroup><ItemGroup>
140.   <PackageReference Include="FluentValidation" Version="11.9.0" />
141.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
142. </ItemGroup>Fields.Add(new Field(DataType.Text, "文本，比如：四川省成都市场", "地址", ""));<ItemGroup>
143.   <PackageReference Include="FluentValidation" Version="11.9.0" />
144.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
145. </ItemGroup><ItemGroup>
146.   <PackageReference Include="FluentValidation" Version="11.9.0" />
147.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
148. </ItemGroup>Fields.Add(new Field(DataType.Number, "数字，比如：12", "工龄", ""));<ItemGroup>
149.   <PackageReference Include="FluentValidation" Version="11.9.0" />
150.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
151. </ItemGroup><ItemGroup>
152.   <PackageReference Include="FluentValidation" Version="11.9.0" />
153.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
154. </ItemGroup>Fields.Add(new Field(DataType.Date, "时间，比如：2023-09-26 05:13:23", "培训时间", ""));<ItemGroup>
155.   <PackageReference Include="FluentValidation" Version="11.9.0" />
156.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
157. </ItemGroup><ItemGroup>
158.   <PackageReference Include="FluentValidation" Version="11.9.0" />
159.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
160. </ItemGroup>PropertyChanged += Validate;<ItemGroup>
161.   <PackageReference Include="FluentValidation" Version="11.9.0" />
162.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
163. </ItemGroup><ItemGroup>
164.   <PackageReference Include="FluentValidation" Version="11.9.0" />
165.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
166. </ItemGroup>CurrentStudent.PropertyChanged += Validate;<ItemGroup>
167.   <PackageReference Include="FluentValidation" Version="11.9.0" />
168.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
169. </ItemGroup><ItemGroup>
170.   <PackageReference Include="FluentValidation" Version="11.9.0" />
171.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
172. </ItemGroup>foreach (var field in Fields)<ItemGroup>
173.   <PackageReference Include="FluentValidation" Version="11.9.0" />
174.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
175. </ItemGroup><ItemGroup>
176.   <PackageReference Include="FluentValidation" Version="11.9.0" />
177.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
178. </ItemGroup>{<ItemGroup>
179.   <PackageReference Include="FluentValidation" Version="11.9.0" />
180.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
181. </ItemGroup><ItemGroup>
182.   <PackageReference Include="FluentValidation" Version="11.9.0" />
183.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
184. </ItemGroup><ItemGroup>
185.   <PackageReference Include="FluentValidation" Version="11.9.0" />
186.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
187. </ItemGroup>field.PropertyChanged += Validate;<ItemGroup>
188.   <PackageReference Include="FluentValidation" Version="11.9.0" />
189.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
190. </ItemGroup><ItemGroup>
191.   <PackageReference Include="FluentValidation" Version="11.9.0" />
192.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
193. </ItemGroup>}<ItemGroup>
194.   <PackageReference Include="FluentValidation" Version="11.9.0" />
195.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
196. </ItemGroup>}<ItemGroup>
197.   <PackageReference Include="FluentValidation" Version="11.9.0" />
198.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
199. </ItemGroup>~StudentViewModel()<ItemGroup>
200.   <PackageReference Include="FluentValidation" Version="11.9.0" />
201.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
202. </ItemGroup>{<ItemGroup>
203.   <PackageReference Include="FluentValidation" Version="11.9.0" />
204.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
205. </ItemGroup><ItemGroup>
206.   <PackageReference Include="FluentValidation" Version="11.9.0" />
207.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
208. </ItemGroup>PropertyChanged -= Validate;<ItemGroup>
209.   <PackageReference Include="FluentValidation" Version="11.9.0" />
210.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
211. </ItemGroup><ItemGroup>
212.   <PackageReference Include="FluentValidation" Version="11.9.0" />
213.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
214. </ItemGroup>CurrentStudent.PropertyChanged -= Validate;<ItemGroup>
215.   <PackageReference Include="FluentValidation" Version="11.9.0" />
216.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
217. </ItemGroup><ItemGroup>
218.   <PackageReference Include="FluentValidation" Version="11.9.0" />
219.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
220. </ItemGroup>foreach (var field in Fields)<ItemGroup>
221.   <PackageReference Include="FluentValidation" Version="11.9.0" />
222.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
223. </ItemGroup><ItemGroup>
224.   <PackageReference Include="FluentValidation" Version="11.9.0" />
225.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
226. </ItemGroup>{<ItemGroup>
227.   <PackageReference Include="FluentValidation" Version="11.9.0" />
228.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
229. </ItemGroup><ItemGroup>
230.   <PackageReference Include="FluentValidation" Version="11.9.0" />
231.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
232. </ItemGroup><ItemGroup>
233.   <PackageReference Include="FluentValidation" Version="11.9.0" />
234.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
235. </ItemGroup>field.PropertyChanged -= Validate;<ItemGroup>
236.   <PackageReference Include="FluentValidation" Version="11.9.0" />
237.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
238. </ItemGroup><ItemGroup>
239.   <PackageReference Include="FluentValidation" Version="11.9.0" />
240.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
241. </ItemGroup>}<ItemGroup>
242.   <PackageReference Include="FluentValidation" Version="11.9.0" />
243.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
244. </ItemGroup>}<ItemGroup>
245.   <PackageReference Include="FluentValidation" Version="11.9.0" />
246.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
247. </ItemGroup>private void Validate(object sender, PropertyChangedEventArgs e)<ItemGroup>
248.   <PackageReference Include="FluentValidation" Version="11.9.0" />
249.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
250. </ItemGroup>{<ItemGroup>
251.   <PackageReference Include="FluentValidation" Version="11.9.0" />
252.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
253. </ItemGroup><ItemGroup>
254.   <PackageReference Include="FluentValidation" Version="11.9.0" />
255.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
256. </ItemGroup>_isCanExecuteSaveCommand = _validator.Validate(this).IsValid;<ItemGroup>
257.   <PackageReference Include="FluentValidation" Version="11.9.0" />
258.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
259. </ItemGroup><ItemGroup>
260.   <PackageReference Include="FluentValidation" Version="11.9.0" />
261.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
262. </ItemGroup>SaveCommand.RaiseCanExecuteChanged();<ItemGroup>
263.   <PackageReference Include="FluentValidation" Version="11.9.0" />
264.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
265. </ItemGroup>}<ItemGroup>
266.   <PackageReference Include="FluentValidation" Version="11.9.0" />
267.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
268. </ItemGroup>private void HandleSaveCommand()<ItemGroup>
269.   <PackageReference Include="FluentValidation" Version="11.9.0" />
270.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
271. </ItemGroup>{<ItemGroup>
272.   <PackageReference Include="FluentValidation" Version="11.9.0" />
273.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
274. </ItemGroup><ItemGroup>
275.   <PackageReference Include="FluentValidation" Version="11.9.0" />
276.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
277. </ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
278.   <PackageReference Include="FluentValidation" Version="11.9.0" />
279.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
280. </ItemGroup><ItemGroup>
281.   <PackageReference Include="FluentValidation" Version="11.9.0" />
282.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
283. </ItemGroup>if (validateResult.IsValid)<ItemGroup>
284.   <PackageReference Include="FluentValidation" Version="11.9.0" />
285.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
286. </ItemGroup><ItemGroup>
287.   <PackageReference Include="FluentValidation" Version="11.9.0" />
288.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
289. </ItemGroup>{<ItemGroup>
290.   <PackageReference Include="FluentValidation" Version="11.9.0" />
291.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
292. </ItemGroup><ItemGroup>
293.   <PackageReference Include="FluentValidation" Version="11.9.0" />
294.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
295. </ItemGroup><ItemGroup>
296.   <PackageReference Include="FluentValidation" Version="11.9.0" />
297.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
298. </ItemGroup>MessageBox.Show("看到我说明验证成功！");<ItemGroup>
299.   <PackageReference Include="FluentValidation" Version="11.9.0" />
300.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
301. </ItemGroup><ItemGroup>
302.   <PackageReference Include="FluentValidation" Version="11.9.0" />
303.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
304. </ItemGroup>}<ItemGroup>
305.   <PackageReference Include="FluentValidation" Version="11.9.0" />
306.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
307. </ItemGroup><ItemGroup>
308.   <PackageReference Include="FluentValidation" Version="11.9.0" />
309.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
310. </ItemGroup>else<ItemGroup>
311.   <PackageReference Include="FluentValidation" Version="11.9.0" />
312.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
313. </ItemGroup><ItemGroup>
314.   <PackageReference Include="FluentValidation" Version="11.9.0" />
315.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
316. </ItemGroup>{<ItemGroup>
317.   <PackageReference Include="FluentValidation" Version="11.9.0" />
318.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
319. </ItemGroup><ItemGroup>
320.   <PackageReference Include="FluentValidation" Version="11.9.0" />
321.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
322. </ItemGroup><ItemGroup>
323.   <PackageReference Include="FluentValidation" Version="11.9.0" />
324.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
325. </ItemGroup>var errorMsg = string.Join(Environment.NewLine,<ItemGroup>
326.   <PackageReference Include="FluentValidation" Version="11.9.0" />
327.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
328. </ItemGroup><ItemGroup>
329.   <PackageReference Include="FluentValidation" Version="11.9.0" />
330.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
331. </ItemGroup><ItemGroup>
332.   <PackageReference Include="FluentValidation" Version="11.9.0" />
333.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
334. </ItemGroup><ItemGroup>
335.   <PackageReference Include="FluentValidation" Version="11.9.0" />
336.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
337. </ItemGroup>validateResult.Errors.Select(x => x.ErrorMessage).ToArray());<ItemGroup>
338.   <PackageReference Include="FluentValidation" Version="11.9.0" />
339.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
340. </ItemGroup><ItemGroup>
341.   <PackageReference Include="FluentValidation" Version="11.9.0" />
342.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
343. </ItemGroup><ItemGroup>
344.   <PackageReference Include="FluentValidation" Version="11.9.0" />
345.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
346. </ItemGroup>MessageBox.Show($"慌啥子嘛，你再检查下输入噻：\r\n{errorMsg}");<ItemGroup>
347.   <PackageReference Include="FluentValidation" Version="11.9.0" />
348.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
349. </ItemGroup><ItemGroup>
350.   <PackageReference Include="FluentValidation" Version="11.9.0" />
351.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
352. </ItemGroup>}<ItemGroup>
353.   <PackageReference Include="FluentValidation" Version="11.9.0" />
354.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
355. </ItemGroup>}<ItemGroup>
356.   <PackageReference Include="FluentValidation" Version="11.9.0" />
357.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
358. </ItemGroup>private bool _isCanExecuteSaveCommand;<ItemGroup>
359.   <PackageReference Include="FluentValidation" Version="11.9.0" />
360.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
361. </ItemGroup>private bool HandleCanExecuteSaveCommand()<ItemGroup>
362.   <PackageReference Include="FluentValidation" Version="11.9.0" />
363.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
364. </ItemGroup>{<ItemGroup>
365.   <PackageReference Include="FluentValidation" Version="11.9.0" />
366.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
367. </ItemGroup><ItemGroup>
368.   <PackageReference Include="FluentValidation" Version="11.9.0" />
369.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
370. </ItemGroup>return _isCanExecuteSaveCommand;<ItemGroup>
371.   <PackageReference Include="FluentValidation" Version="11.9.0" />
372.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
373. </ItemGroup>}<ItemGroup>
374.   <PackageReference Include="FluentValidation" Version="11.9.0" />
375.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
376. </ItemGroup>private void HandleCancelCommand()<ItemGroup>
377.   <PackageReference Include="FluentValidation" Version="11.9.0" />
378.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
379. </ItemGroup>{<ItemGroup>
380.   <PackageReference Include="FluentValidation" Version="11.9.0" />
381.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
382. </ItemGroup><ItemGroup>
383.   <PackageReference Include="FluentValidation" Version="11.9.0" />
384.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
385. </ItemGroup>MessageBox.Show("我啥都不做，退休了");<ItemGroup>
386.   <PackageReference Include="FluentValidation" Version="11.9.0" />
387.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
388. </ItemGroup>}<ItemGroup>
389.   <PackageReference Include="FluentValidation" Version="11.9.0" />
390.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
391. </ItemGroup>public string this[string columnName]<ItemGroup>
392.   <PackageReference Include="FluentValidation" Version="11.9.0" />
393.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
394. </ItemGroup>{<ItemGroup>
395.   <PackageReference Include="FluentValidation" Version="11.9.0" />
396.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
397. </ItemGroup><ItemGroup>
398.   <PackageReference Include="FluentValidation" Version="11.9.0" />
399.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
400. </ItemGroup>get<ItemGroup>
401.   <PackageReference Include="FluentValidation" Version="11.9.0" />
402.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
403. </ItemGroup><ItemGroup>
404.   <PackageReference Include="FluentValidation" Version="11.9.0" />
405.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
406. </ItemGroup>{<ItemGroup>
407.   <PackageReference Include="FluentValidation" Version="11.9.0" />
408.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
409. </ItemGroup><ItemGroup>
410.   <PackageReference Include="FluentValidation" Version="11.9.0" />
411.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
412. </ItemGroup><ItemGroup>
413.   <PackageReference Include="FluentValidation" Version="11.9.0" />
414.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
415. </ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
416.   <PackageReference Include="FluentValidation" Version="11.9.0" />
417.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
418. </ItemGroup><ItemGroup>
419.   <PackageReference Include="FluentValidation" Version="11.9.0" />
420.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
421. </ItemGroup><ItemGroup>
422.   <PackageReference Include="FluentValidation" Version="11.9.0" />
423.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
424. </ItemGroup>if (validateResult.IsValid)<ItemGroup>
425.   <PackageReference Include="FluentValidation" Version="11.9.0" />
426.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
427. </ItemGroup><ItemGroup>
428.   <PackageReference Include="FluentValidation" Version="11.9.0" />
429.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
430. </ItemGroup><ItemGroup>
431.   <PackageReference Include="FluentValidation" Version="11.9.0" />
432.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
433. </ItemGroup>{<ItemGroup>
434.   <PackageReference Include="FluentValidation" Version="11.9.0" />
435.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
436. </ItemGroup><ItemGroup>
437.   <PackageReference Include="FluentValidation" Version="11.9.0" />
438.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
439. </ItemGroup><ItemGroup>
440.   <PackageReference Include="FluentValidation" Version="11.9.0" />
441.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
442. </ItemGroup><ItemGroup>
443.   <PackageReference Include="FluentValidation" Version="11.9.0" />
444.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
445. </ItemGroup>return string.Empty;<ItemGroup>
446.   <PackageReference Include="FluentValidation" Version="11.9.0" />
447.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
448. </ItemGroup><ItemGroup>
449.   <PackageReference Include="FluentValidation" Version="11.9.0" />
450.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
451. </ItemGroup><ItemGroup>
452.   <PackageReference Include="FluentValidation" Version="11.9.0" />
453.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
454. </ItemGroup>}<ItemGroup>
455.   <PackageReference Include="FluentValidation" Version="11.9.0" />
456.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
457. </ItemGroup><ItemGroup>
458.   <PackageReference Include="FluentValidation" Version="11.9.0" />
459.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
460. </ItemGroup><ItemGroup>
461.   <PackageReference Include="FluentValidation" Version="11.9.0" />
462.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
463. </ItemGroup>var firstOrDefault =<ItemGroup>
464.   <PackageReference Include="FluentValidation" Version="11.9.0" />
465.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
466. </ItemGroup><ItemGroup>
467.   <PackageReference Include="FluentValidation" Version="11.9.0" />
468.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
469. </ItemGroup><ItemGroup>
470.   <PackageReference Include="FluentValidation" Version="11.9.0" />
471.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
472. </ItemGroup><ItemGroup>
473.   <PackageReference Include="FluentValidation" Version="11.9.0" />
474.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
475. </ItemGroup>validateResult.Errors.FirstOrDefault(error => error.PropertyName == columnName);<ItemGroup>
476.   <PackageReference Include="FluentValidation" Version="11.9.0" />
477.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
478. </ItemGroup><ItemGroup>
479.   <PackageReference Include="FluentValidation" Version="11.9.0" />
480.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
481. </ItemGroup><ItemGroup>
482.   <PackageReference Include="FluentValidation" Version="11.9.0" />
483.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
484. </ItemGroup>return firstOrDefault == null ? string.Empty : firstOrDefault.ErrorMessage;<ItemGroup>
485.   <PackageReference Include="FluentValidation" Version="11.9.0" />
486.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
487. </ItemGroup><ItemGroup>
488.   <PackageReference Include="FluentValidation" Version="11.9.0" />
489.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
490. </ItemGroup>}<ItemGroup>
491.   <PackageReference Include="FluentValidation" Version="11.9.0" />
492.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
493. </ItemGroup>}<ItemGroup>
494.   <PackageReference Include="FluentValidation" Version="11.9.0" />
495.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
496. </ItemGroup>public string Error<ItemGroup>
497.   <PackageReference Include="FluentValidation" Version="11.9.0" />
498.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
499. </ItemGroup>{<ItemGroup>
500.   <PackageReference Include="FluentValidation" Version="11.9.0" />
501.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
502. </ItemGroup><ItemGroup>
503.   <PackageReference Include="FluentValidation" Version="11.9.0" />
504.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
505. </ItemGroup>get<ItemGroup>
506.   <PackageReference Include="FluentValidation" Version="11.9.0" />
507.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
508. </ItemGroup><ItemGroup>
509.   <PackageReference Include="FluentValidation" Version="11.9.0" />
510.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
511. </ItemGroup>{<ItemGroup>
512.   <PackageReference Include="FluentValidation" Version="11.9.0" />
513.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
514. </ItemGroup><ItemGroup>
515.   <PackageReference Include="FluentValidation" Version="11.9.0" />
516.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
517. </ItemGroup><ItemGroup>
518.   <PackageReference Include="FluentValidation" Version="11.9.0" />
519.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
520. </ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
521.   <PackageReference Include="FluentValidation" Version="11.9.0" />
522.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
523. </ItemGroup><ItemGroup>
524.   <PackageReference Include="FluentValidation" Version="11.9.0" />
525.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
526. </ItemGroup><ItemGroup>
527.   <PackageReference Include="FluentValidation" Version="11.9.0" />
528.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
529. </ItemGroup>if (validateResult.IsValid)<ItemGroup>
530.   <PackageReference Include="FluentValidation" Version="11.9.0" />
531.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
532. </ItemGroup><ItemGroup>
533.   <PackageReference Include="FluentValidation" Version="11.9.0" />
534.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
535. </ItemGroup><ItemGroup>
536.   <PackageReference Include="FluentValidation" Version="11.9.0" />
537.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
538. </ItemGroup>{<ItemGroup>
539.   <PackageReference Include="FluentValidation" Version="11.9.0" />
540.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
541. </ItemGroup><ItemGroup>
542.   <PackageReference Include="FluentValidation" Version="11.9.0" />
543.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
544. </ItemGroup><ItemGroup>
545.   <PackageReference Include="FluentValidation" Version="11.9.0" />
546.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
547. </ItemGroup><ItemGroup>
548.   <PackageReference Include="FluentValidation" Version="11.9.0" />
549.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
550. </ItemGroup>return string.Empty;<ItemGroup>
551.   <PackageReference Include="FluentValidation" Version="11.9.0" />
552.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
553. </ItemGroup><ItemGroup>
554.   <PackageReference Include="FluentValidation" Version="11.9.0" />
555.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
556. </ItemGroup><ItemGroup>
557.   <PackageReference Include="FluentValidation" Version="11.9.0" />
558.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
559. </ItemGroup>}<ItemGroup>
560.   <PackageReference Include="FluentValidation" Version="11.9.0" />
561.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
562. </ItemGroup><ItemGroup>
563.   <PackageReference Include="FluentValidation" Version="11.9.0" />
564.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
565. </ItemGroup><ItemGroup>
566.   <PackageReference Include="FluentValidation" Version="11.9.0" />
567.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
568. </ItemGroup>var errors = string.Join(Environment.NewLine, validateResult.Errors.Select(x => x.ErrorMessage).ToArray());<ItemGroup>
569.   <PackageReference Include="FluentValidation" Version="11.9.0" />
570.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
571. </ItemGroup><ItemGroup>
572.   <PackageReference Include="FluentValidation" Version="11.9.0" />
573.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
574. </ItemGroup><ItemGroup>
575.   <PackageReference Include="FluentValidation" Version="11.9.0" />
576.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
577. </ItemGroup>return errors;<ItemGroup>
578.   <PackageReference Include="FluentValidation" Version="11.9.0" />
579.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
580. </ItemGroup><ItemGroup>
581.   <PackageReference Include="FluentValidation" Version="11.9.0" />
582.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
583. </ItemGroup>}<ItemGroup>
584.   <PackageReference Include="FluentValidation" Version="11.9.0" />
585.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
586. </ItemGroup>}}

复制代码

ViewModel属性验证和Student及Field类似，这里我加上了保存(SaveCommand)和取消(CancelCommand)两个命令，其中保存命令需要所有属性验证通过才可用，通过注册属性的变化事件PropertyChanged，在变化事件处理程序中验证：

1. PropertyChanged += Validate;CurrentStudent.PropertyChanged += Validate;foreach (var field in Fields){<ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup>field.PropertyChanged += Validate;}

复制代码

1. private void Validate(object sender, PropertyChangedEventArgs e){<ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup>_isCanExecuteSaveCommand = _validator.Validate(this).IsValid;<ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup>SaveCommand.RaiseCanExecuteChanged();}

复制代码

4.5. 视图层实现

在视图层，我创建了一个用户控件StudentView，用于显示输入表单和验证结果。通过绑定ViewModel层的属性和命令，视图层能够与ViewModel层进行交互，并实时显示验证错误。这里比较简单，提供简单属性标题(Title)、复杂属性(包括学生姓名(CurrentStudent.Name)、学生年龄( CurrentStudent .Age)、学生邮政编码( CurrentStudent .Zip)、最小值(CurrentStudent.MinValue)、最大值(CurrentStudent.MaxValue)）验证、集合属性验证(Fields)，xaml代码如下：

1. <ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup><ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup><ItemGroup>
8.   <PackageReference Include="FluentValidation" Version="11.9.0" />
9.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
10. </ItemGroup><ItemGroup>
11.   <PackageReference Include="FluentValidation" Version="11.9.0" />
12.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
13. </ItemGroup><ItemGroup>
14.   <PackageReference Include="FluentValidation" Version="11.9.0" />
15.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
16. </ItemGroup><ItemGroup>
17.   <PackageReference Include="FluentValidation" Version="11.9.0" />
18.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
19. </ItemGroup><ItemGroup>
20.   <PackageReference Include="FluentValidation" Version="11.9.0" />
21.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
22. </ItemGroup><ItemGroup>
23.   <PackageReference Include="FluentValidation" Version="11.9.0" />
24.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
25. </ItemGroup><ItemGroup>
26.   <PackageReference Include="FluentValidation" Version="11.9.0" />
27.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
28. </ItemGroup><ItemGroup>
29.   <PackageReference Include="FluentValidation" Version="11.9.0" />
30.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
31. </ItemGroup><ItemGroup>
32.   <PackageReference Include="FluentValidation" Version="11.9.0" />
33.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
34. </ItemGroup><ItemGroup>
35.   <PackageReference Include="FluentValidation" Version="11.9.0" />
36.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
37. </ItemGroup><ItemGroup>
38.   <PackageReference Include="FluentValidation" Version="11.9.0" />
39.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
40. </ItemGroup><ItemGroup>
41.   <PackageReference Include="FluentValidation" Version="11.9.0" />
42.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
43. </ItemGroup><ItemGroup>
44.   <PackageReference Include="FluentValidation" Version="11.9.0" />
45.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
46. </ItemGroup><ItemGroup>
47.   <PackageReference Include="FluentValidation" Version="11.9.0" />
48.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
49. </ItemGroup><ItemGroup>
50.   <PackageReference Include="FluentValidation" Version="11.9.0" />
51.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
52. </ItemGroup><ItemGroup>
53.   <PackageReference Include="FluentValidation" Version="11.9.0" />
54.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
55. </ItemGroup><ItemGroup>
56.   <PackageReference Include="FluentValidation" Version="11.9.0" />
57.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
58. </ItemGroup><ItemGroup>
59.   <PackageReference Include="FluentValidation" Version="11.9.0" />
60.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
61. </ItemGroup><ItemGroup>
62.   <PackageReference Include="FluentValidation" Version="11.9.0" />
63.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
64. </ItemGroup><ItemGroup>
65.   <PackageReference Include="FluentValidation" Version="11.9.0" />
66.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
67. </ItemGroup><ItemGroup>
68.   <PackageReference Include="FluentValidation" Version="11.9.0" />
69.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
70. </ItemGroup><ItemGroup>
71.   <PackageReference Include="FluentValidation" Version="11.9.0" />
72.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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1256.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1257.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1258. </ItemGroup><ItemGroup>
1259.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1260.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1261. </ItemGroup><ItemGroup>
1262.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1263.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1264. </ItemGroup><ItemGroup>
1265.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1266.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1267. </ItemGroup><ItemGroup>
1268.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1269.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1270. </ItemGroup><ItemGroup>
1271.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1272.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1273. </ItemGroup><ItemGroup>
1274.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1275.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1276. </ItemGroup><ItemGroup>
1277.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1278.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1279. </ItemGroup><ItemGroup>
1280.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1281.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1282. </ItemGroup><ItemGroup>
1283.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1284.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1285. </ItemGroup><ItemGroup>
1286.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1287.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1288. </ItemGroup><ItemGroup>
1289.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1290.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1291. </ItemGroup><ItemGroup>
1292.   <PackageReference Include="FluentValidation" Version="11.9.0" />
1293.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
1294. </ItemGroup>

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4.6. 错误提示样式

为了提升用户体验，我定义了两种错误提示样式：一种是通过红色图标提示输入框旁边的错误，另一种是在输入框右侧显示错误文字。这些样式定义在App.xaml中，并可以在整个应用程序中复用。

1. <ItemGroup>
2.   <PackageReference Include="FluentValidation" Version="11.9.0" />
3.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
4. </ItemGroup><ItemGroup>
5.   <PackageReference Include="FluentValidation" Version="11.9.0" />
6.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
7. </ItemGroup><ItemGroup>
8.   <PackageReference Include="FluentValidation" Version="11.9.0" />
9.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
10. </ItemGroup><ItemGroup>
11.   <PackageReference Include="FluentValidation" Version="11.9.0" />
12.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
13. </ItemGroup><ItemGroup>
14.   <PackageReference Include="FluentValidation" Version="11.9.0" />
15.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
16. </ItemGroup><ItemGroup>
17.   <PackageReference Include="FluentValidation" Version="11.9.0" />
18.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
19. </ItemGroup><ItemGroup>
20.   <PackageReference Include="FluentValidation" Version="11.9.0" />
21.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
22. </ItemGroup><ItemGroup>
23.   <PackageReference Include="FluentValidation" Version="11.9.0" />
24.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
25. </ItemGroup><ItemGroup>
26.   <PackageReference Include="FluentValidation" Version="11.9.0" />
27.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
28. </ItemGroup><ItemGroup>
29.   <PackageReference Include="FluentValidation" Version="11.9.0" />
30.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
31. </ItemGroup><ItemGroup>
32.   <PackageReference Include="FluentValidation" Version="11.9.0" />
33.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
34. </ItemGroup><ItemGroup>
35.   <PackageReference Include="FluentValidation" Version="11.9.0" />
36.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
37. </ItemGroup><ItemGroup>
38.   <PackageReference Include="FluentValidation" Version="11.9.0" />
39.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
40. </ItemGroup><ItemGroup>
41.   <PackageReference Include="FluentValidation" Version="11.9.0" />
42.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
43. </ItemGroup><ItemGroup>
44.   <PackageReference Include="FluentValidation" Version="11.9.0" />
45.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
46. </ItemGroup><ItemGroup>
47.   <PackageReference Include="FluentValidation" Version="11.9.0" />
48.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
49. </ItemGroup><ItemGroup>
50.   <PackageReference Include="FluentValidation" Version="11.9.0" />
51.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
52. </ItemGroup><ItemGroup>
53.   <PackageReference Include="FluentValidation" Version="11.9.0" />
54.   <PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
55. </ItemGroup>

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5. 效果展示

通过上述步骤的实现，我们得到了一个功能完善的WPF应用程序。它能够根据用户输入实时进行验证，并提供直观的错误提示。当所有属性都验证通过时，提交按钮将变为可用状态。

6. 源码分享

为了方便读者学习和交流，本文将所有代码同步到了Gitee和Github平台上。欢迎感兴趣的开发者访问以下链接获取源码：

• gitee: https://gitee.com/dotnet9/FluentValidationForWpf
  
• github： https://github.com/dotnet9/FluentValidationForWPF
  

7. 总结

通过本文的介绍和实践，我们成功将FluentValidation应用于C# WPF项目中，实现了对ViewModel层属性的全面验证。这不仅提升了数据的安全性和准确性，也为用户提供了更好的交互体验。希望本文能对广大开发者在WPF项目中使用FluentValidation提供有益的参考和启示。
参考：

• FluentValidation官网： https://fluentvalidation.net/
  

来源:https://www.cnblogs.com/Dotnet9-com/p/17986383
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