论坛 › .net › FluentValidation在C# WPF中的应用

岭南综艺电影 发表于 2024-1-25 12:57:02

FluentValidation在C# WPF中的应用

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。
<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>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）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。
/// ///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 学生实体///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 继承BindableBase,即继承属性变化接口INotifyPropertyChanged///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 实现IDataErrorInfo接口，用于FluentValidation验证，必须实现此接口/// public class Student : BindableBase, IDataErrorInfo{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private int _age;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private string? _name;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private string? _zip;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private readonly StudentValidator _validator = new();<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string? Name<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get => _name;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>set => SetProperty(ref _name, value);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public int Age<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get => _age;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>set => SetProperty(ref _age, value);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string? Zip<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get => _zip;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>set => SetProperty(ref _zip, value);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private int _minValue;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public int MinValue<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get => _minValue;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>set<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>SetProperty(ref _minValue, value);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>// 关联更新最大值验证<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RaisePropertyChanged(nameof(MaxValue));<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private int _maxValue;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public int MaxValue<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get => _maxValue;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>set<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>SetProperty(ref _maxValue, value);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>// 关联更新最小值验证<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RaisePropertyChanged(nameof(MinValue));<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string this<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>if (validateResult.IsValid)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return string.Empty;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var firstOrDefault =<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>validateResult.Errors.FirstOrDefault(error => error.PropertyName == columnName);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return firstOrDefault == null ? string.Empty : firstOrDefault.ErrorMessage;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string Error<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>if (validateResult.IsValid)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return string.Empty;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var errors = string.Join(Environment.NewLine, validateResult.Errors.Select(x => x.ErrorMessage).ToArray());<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return errors;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}}上面关键代码在public string this：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。
/// ///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 扩展字段，用于生成动态表单///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 继承BindableBase,即继承属性变化接口INotifyPropertyChanged///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 实现IDataErrorInfo接口，用于FluentValidation验证，必须实现此接口/// public class Field : BindableBase, IDataErrorInfo{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private string? _value;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private readonly FieldValidator _validator = new();<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public Field(DataType type, string typeLabel, string name, string value)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Type = type;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>TypeLabel = typeLabel;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Name = name;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Value = value;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> ///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 数据类型<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> public DataType Type { get; set; }<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> ///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 数据类型名称<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> public string TypeLabel { get; set; }<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> ///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 名称<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> public string Name { get; set; }<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> ///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 值<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> public string? Value<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get => _value;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>set => SetProperty(ref _value, value);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string this<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>if (validateResult.IsValid)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return string.Empty;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var firstOrDefault =<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>validateResult.Errors.FirstOrDefault(error => error.PropertyName == columnName);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return firstOrDefault == null ? string.Empty : firstOrDefault.ErrorMessage;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string Error<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>if (validateResult.IsValid)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return string.Empty;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var errors = string.Join(Environment.NewLine, validateResult.Errors.Select(x => x.ErrorMessage).ToArray());<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return errors;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}}public enum DataType{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Text,<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Number,<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Date}看上面代码，public string this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：
public class StudentValidator : AbstractValidator{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public StudentValidator()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RuleFor(vm => vm.Name)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.NotEmpty()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.WithMessage("请输入学生姓名！")<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.Length(5, 30)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.WithMessage("学生姓名长度限制在5到30个字符之间！");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RuleFor(vm => vm.Age)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.GreaterThanOrEqualTo(0)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.WithMessage("学生年龄为整数！")<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.ExclusiveBetween(10, 150)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.WithMessage("请正确输入学生年龄(10-150)");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>_ = RuleFor(vm => vm.Zip)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.NotEmpty()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.WithMessage("邮政编码不能为空！")<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.Must(BeAValidZip)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.WithMessage("邮政编码由六位数字组成。");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RuleFor(model => model.MinValue).Must((model, minValue) => minValue < model.MaxValue).WithMessage("最小值应该小于最大值");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RuleFor(model => model.MaxValue).Must((model, maxValue) => maxValue > model.MinValue).WithMessage("最大值应该大于最小值");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private static bool BeAValidZip(string? zip)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>if (string.IsNullOrEmpty(zip))<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return false;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var regex = new Regex(@"\d{6}");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return regex.IsMatch(zip);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}}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：：
public class FieldValidator : AbstractValidator{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public FieldValidator()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RuleFor(field => field.Value)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.Must((field, value) => (field.Type == DataType.Text && !string.IsNullOrWhiteSpace(value))<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>|| (field.Type == DataType.Number && double.TryParse(value, out _))<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>|| (field.Type == DataType.Date && DateTime.TryParse(value, out _)))<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</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>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}}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。
public class StudentViewModelValidator : AbstractValidator{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public StudentViewModelValidator()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RuleFor(vm => vm.Title)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.NotEmpty()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.WithMessage("标题长度不能为空！")<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.Length(5, 30)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>.WithMessage("标题长度限制在5到30个字符之间！");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RuleFor(vm => vm.CurrentStudent).SetValidator(new StudentValidator());<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>RuleForEach(vm => vm.Fields).SetValidator(new FieldValidator());<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}}
[*]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：
/// ///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 视图ViewModel///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 继承BindableBase,即继承属性变化接口INotifyPropertyChanged///<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup> 实现IDataErrorInfo接口，用于FluentValidation验证，必须实现此接口/// public class StudentViewModel : BindableBase, IDataErrorInfo{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private Student _currentStudent;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private string _title;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private readonly StudentViewModelValidator _validator;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string Title<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get => _title;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>set => SetProperty(ref _title, value);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public Student CurrentStudent<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get => _currentStudent;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>set => SetProperty(ref _currentStudent, value);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public ObservableCollection Fields { get; } = new();<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private DelegateCommand _saveCommand;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public DelegateCommand SaveCommand => _saveCommand ??= new DelegateCommand(HandleSaveCommand,<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>HandleCanExecuteSaveCommand);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private DelegateCommand _cancelCommand;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public DelegateCommand CancelCommand =><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>_cancelCommand ??= new DelegateCommand(HandleCancelCommand, () => true);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public StudentViewModel()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>_validator = new StudentViewModelValidator();<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>CurrentStudent = new Student<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Name = "李刚的儿",<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Age = 23<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>};<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Fields.Add(new Field(DataType.Text, "文本，比如：四川省成都市场", "地址", ""));<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Fields.Add(new Field(DataType.Number, "数字，比如：12", "工龄", ""));<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>Fields.Add(new Field(DataType.Date, "时间，比如：2023-09-26 05:13:23", "培训时间", ""));<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>PropertyChanged += Validate;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>CurrentStudent.PropertyChanged += Validate;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>foreach (var field in Fields)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>field.PropertyChanged += Validate;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>~StudentViewModel()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>PropertyChanged -= Validate;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>CurrentStudent.PropertyChanged -= Validate;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>foreach (var field in Fields)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>field.PropertyChanged -= Validate;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private void Validate(object sender, PropertyChangedEventArgs e)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>_isCanExecuteSaveCommand = _validator.Validate(this).IsValid;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>SaveCommand.RaiseCanExecuteChanged();<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private void HandleSaveCommand()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>if (validateResult.IsValid)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>MessageBox.Show("看到我说明验证成功！");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>else<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var errorMsg = string.Join(Environment.NewLine,<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>validateResult.Errors.Select(x => x.ErrorMessage).ToArray());<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>MessageBox.Show($"慌啥子嘛，你再检查下输入噻：\r\n{errorMsg}");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private bool _isCanExecuteSaveCommand;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private bool HandleCanExecuteSaveCommand()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return _isCanExecuteSaveCommand;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>private void HandleCancelCommand()<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>MessageBox.Show("我啥都不做，退休了");<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string this<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>if (validateResult.IsValid)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return string.Empty;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var firstOrDefault =<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>validateResult.Errors.FirstOrDefault(error => error.PropertyName == columnName);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return firstOrDefault == null ? string.Empty : firstOrDefault.ErrorMessage;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>public string Error<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>get<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var validateResult = _validator.Validate(this);<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>if (validateResult.IsValid)<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>{<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return string.Empty;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>var errors = string.Join(Environment.NewLine, validateResult.Errors.Select(x => x.ErrorMessage).ToArray());<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>return errors;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>}}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：
PropertyChanged += Validate;CurrentStudent.PropertyChanged += Validate;foreach (var field in Fields){<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>field.PropertyChanged += Validate;}private void Validate(object sender, PropertyChangedEventArgs e){<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>_isCanExecuteSaveCommand = _validator.Validate(this).IsValid;<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup>SaveCommand.RaiseCanExecuteChanged();}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：
<ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
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<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
</ItemGroup><ItemGroup>
<PackageReference Include="FluentValidation" Version="11.9.0" />
<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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<PackageReference Include="Prism.Wpf" Version="9.0.271-pre" />
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</ItemGroup>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。
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<PackageReference Include="FluentValidation" Version="11.9.0" />
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</ItemGroup>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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