WPF DataGrid开箱即用支持全部勾选的DataGridCheckBoxColumn

互补共赢

1. 本文由 飞羽流星(Flithor/毛茸茸松鼠先生/Mr.Squirrel.Downy)原创,欢迎分享转载,但禁止以原创二次发布<br>原文地址：<a href="https://www.cnblogs.com/Flithor/p/17877473.html" target="_blank" rel="noopener">https://www.cnblogs.com/Flithor/p/17877473.html</a>

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以往在WPF的DataGrid上实现实时勾选交互非常麻烦,要用DataGridTemplateColumn写样式还要写一些后端代码，还有绑定和转换器，或者处理事件。
但是现在都不需要了，使用开箱即用的DataGridCheckAllColumn，简化你的勾选代码实现！
它支持列表筛选变化反馈，支持虚拟化，支持单项勾选变化的更新反馈。
效果预览：

而且非常简单好用：

1. <DataGrid.Columns>
2.    
3.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
4.    
5.     <DataGridTextColumn Binding="{Binding EntityName}" />
6. </DataGrid.Columns>

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1. <strong>注意！</strong>
2. 如果你在DataGrid上设置了<strong>VirtualizingPanel.IsVirtualizing="True"</strong>应用虚拟化
3. 需要同时设置<strong>VirtualizingPanel.VirtualizationMode="Standard"</strong>，避免出现绑定实例错误的Bug

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DataGridCheckAllColumn类的实现：

1. // 代码作者: 飞羽流星(Flithor/Mr.Squirrel.Downy/毛茸茸松鼠先生)// 开源许可: MIT// =======警告=======// 使用开源代码的风险自负using System;using System.Collections.Generic;using System.ComponentModel;using System.Globalization;using System.Linq;using System.Reflection;using System.Runtime.Remoting.Messaging;using System.Windows;using System.Windows.Controls;using System.Windows.Controls.Primitives;using System.Windows.Data;using System.Windows.Media;using Expression = System.Linq.Expressions.Expression;namespace Flithor_Codes{    ///     /// 一个支持勾选所有的DataGrid列    ///     public class DataGridCheckAllColumn : DataGridBoundColumn    {        #region 私有字段        //列头中的CheckBox        private readonly CheckBox checkAllCheckBox;        //所属DataGrid控件        private DataGrid ownerDatagrid;        //所属DataGrid控件的列表版本,如果版本号改变则说明列表改变        private Func getInnerEnumeratorVersion;        //缓存的列表版本号        private int cachedInnerVersion;        //CheckBox的默认样式        private static Style _defaultElementStyle;        #endregion        #region 初始化控件        public static Style DefaultElementStyle        {            get            {<DataGrid.Columns>
2.    
3.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
4.    
5.     <DataGridTextColumn Binding="{Binding EntityName}" />
6. </DataGrid.Columns>if (_defaultElementStyle == null)<DataGrid.Columns>
7.    
8.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
9.    
10.     <DataGridTextColumn Binding="{Binding EntityName}" />
11. </DataGrid.Columns>{<DataGrid.Columns>
12.    
13.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
14.    
15.     <DataGridTextColumn Binding="{Binding EntityName}" />
16. </DataGrid.Columns>    var style = new Style(typeof(CheckBox))<DataGrid.Columns>
17.    
18.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
19.    
20.     <DataGridTextColumn Binding="{Binding EntityName}" />
21. </DataGrid.Columns>    {<DataGrid.Columns>
22.    
23.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
24.    
25.     <DataGridTextColumn Binding="{Binding EntityName}" />
26. </DataGrid.Columns>        Setters =<DataGrid.Columns>
27.    
28.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
29.    
30.     <DataGridTextColumn Binding="{Binding EntityName}" />
31. </DataGrid.Columns>        {<DataGrid.Columns>
32.    
33.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
34.    
35.     <DataGridTextColumn Binding="{Binding EntityName}" />
36. </DataGrid.Columns>            new Setter(UIElement.FocusableProperty, false),<DataGrid.Columns>
37.    
38.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
39.    
40.     <DataGridTextColumn Binding="{Binding EntityName}" />
41. </DataGrid.Columns>            new Setter(CheckBox.HorizontalAlignmentProperty, HorizontalAlignment.Center),<DataGrid.Columns>
42.    
43.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
44.    
45.     <DataGridTextColumn Binding="{Binding EntityName}" />
46. </DataGrid.Columns>            new Setter(CheckBox.VerticalAlignmentProperty, VerticalAlignment.Center)<DataGrid.Columns>
47.    
48.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
49.    
50.     <DataGridTextColumn Binding="{Binding EntityName}" />
51. </DataGrid.Columns>        }<DataGrid.Columns>
52.    
53.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
54.    
55.     <DataGridTextColumn Binding="{Binding EntityName}" />
56. </DataGrid.Columns>    };<DataGrid.Columns>
57.    
58.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
59.    
60.     <DataGridTextColumn Binding="{Binding EntityName}" />
61. </DataGrid.Columns>    style.Seal();<DataGrid.Columns>
62.    
63.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
64.    
65.     <DataGridTextColumn Binding="{Binding EntityName}" />
66. </DataGrid.Columns>    _defaultElementStyle = style;<DataGrid.Columns>
67.    
68.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
69.    
70.     <DataGridTextColumn Binding="{Binding EntityName}" />
71. </DataGrid.Columns>}<DataGrid.Columns>
72.    
73.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
74.    
75.     <DataGridTextColumn Binding="{Binding EntityName}" />
76. </DataGrid.Columns>return _defaultElementStyle;            }        }        static DataGridCheckAllColumn()        {            //重写单元格元素默认样式            ElementStyleProperty.OverrideMetadata(typeof(DataGridCheckAllColumn), new FrameworkPropertyMetadata(DefaultElementStyle));            //使列默认只读            IsReadOnlyProperty.OverrideMetadata(typeof(DataGridCheckAllColumn), new FrameworkPropertyMetadata(true));            //不允许重排此列            CanUserReorderProperty.OverrideMetadata(typeof(DataGridCheckAllColumn), new FrameworkPropertyMetadata(false));            //不允许修改此列宽度            CanUserResizeProperty.OverrideMetadata(typeof(DataGridCheckAllColumn), new FrameworkPropertyMetadata(false));            //不允许点击列头排序项目            CanUserSortProperty.OverrideMetadata(typeof(DataGridCheckAllColumn), new FrameworkPropertyMetadata(false));        }        public DataGridCheckAllColumn()        {            //设置列头            Header = checkAllCheckBox = new CheckBox();        }        protected override void OnPropertyChanged(DependencyPropertyChangedEventArgs e)        {            if (ownerDatagrid != null) return;            ownerDatagrid = GetParentDataGrid();            if (ownerDatagrid == null) return;            InitInnerVersionDetect(ownerDatagrid.Items);            ((INotifyPropertyChanged)ownerDatagrid.Items).PropertyChanged += OnPropertyChanged;            //如果DataGrid当前已有项目,则初始化绑定            checkAllCheckBox.IsEnabled = ownerDatagrid.Items.Count > 0;            if (checkAllCheckBox.IsEnabled)<DataGrid.Columns>
77.    
78.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
79.    
80.     <DataGridTextColumn Binding="{Binding EntityName}" />
81. </DataGrid.Columns>ResetCheckCurrentAllBinding();        }        //寻找所属DataGrid控件(如果还没初始化完毕,可能返回空值)        private DataGrid GetParentDataGrid()        {            DependencyObject elment = checkAllCheckBox;            do            {<DataGrid.Columns>
82.    
83.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
84.    
85.     <DataGridTextColumn Binding="{Binding EntityName}" />
86. </DataGrid.Columns>elment = VisualTreeHelper.GetParent(elment);            }            while (elment != null && !(elment is DataGrid));            return elment as DataGrid;        }        #endregion        #region 构建单元格元素(方法的功能不言自明)        protected override FrameworkElement GenerateElement(DataGridCell cell, object dataItem)        {            return GenerateCheckBox(false, cell, dataItem);        }        protected override FrameworkElement GenerateEditingElement(DataGridCell cell, object dataItem)        {            return GenerateCheckBox(true, cell, dataItem);        }        private CheckBox GenerateCheckBox(bool isEditing, DataGridCell cell, object dataItem)        {            var checkBox = new CheckBox();            ApplyStyle(isEditing, checkBox);            ApplyBinding(dataItem, checkBox);            return checkBox;        }        private void ApplyBinding(object dataItem, CheckBox checkBox)        {            var binding = CloneBinding(Binding, dataItem);            if (binding is Binding newBinding)            {<DataGrid.Columns>
87.    
88.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
89.    
90.     <DataGridTextColumn Binding="{Binding EntityName}" />
91. </DataGrid.Columns>newBinding.Mode = BindingMode.TwoWay;<DataGrid.Columns>
92.    
93.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
94.    
95.     <DataGridTextColumn Binding="{Binding EntityName}" />
96. </DataGrid.Columns>newBinding.UpdateSourceTrigger = UpdateSourceTrigger.PropertyChanged;            }            BindingOperations.ClearBinding(checkBox, CheckBox.IsCheckedProperty);            checkBox.SetBinding(CheckBox.IsCheckedProperty, binding);        }        internal void ApplyStyle(bool isEditing, FrameworkElement element)        {            Style style = PickStyle(isEditing);            if (style != null)            {<DataGrid.Columns>
97.    
98.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
99.    
100.     <DataGridTextColumn Binding="{Binding EntityName}" />
101. </DataGrid.Columns>element.Style = style;            }        }        private Style PickStyle(bool isEditing)        {            Style style = isEditing ? EditingElementStyle : ElementStyle;            if (isEditing && (style == null))            {<DataGrid.Columns>
102.    
103.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
104.    
105.     <DataGridTextColumn Binding="{Binding EntityName}" />
106. </DataGrid.Columns>style = ElementStyle;            }            return style;        }        #endregion        #region 更新绑定        private void OnPropertyChanged(object sender, PropertyChangedEventArgs e)        {            if (ownerDatagrid == null || e.PropertyName != nameof(ownerDatagrid.Items.Count))<DataGrid.Columns>
107.    
108.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
109.    
110.     <DataGridTextColumn Binding="{Binding EntityName}" />
111. </DataGrid.Columns>return;            //如果项目数量发生改变意味着列表更新了            if (ownerDatagrid.Items.Count == 0)            {<DataGrid.Columns>
112.    
113.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
114.    
115.     <DataGridTextColumn Binding="{Binding EntityName}" />
116. </DataGrid.Columns>//如果列表空了,那就移除绑定并禁用列头勾选控件<DataGrid.Columns>
117.    
118.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
119.    
120.     <DataGridTextColumn Binding="{Binding EntityName}" />
121. </DataGrid.Columns>BindingOperations.ClearBinding(checkAllCheckBox, CheckBox.IsCheckedProperty);<DataGrid.Columns>
122.    
123.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
124.    
125.     <DataGridTextColumn Binding="{Binding EntityName}" />
126. </DataGrid.Columns>checkAllCheckBox.IsEnabled = false;            }            else            {<DataGrid.Columns>
127.    
128.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
129.    
130.     <DataGridTextColumn Binding="{Binding EntityName}" />
131. </DataGrid.Columns>//否则基于当前列表显示项更新绑定<DataGrid.Columns>
132.    
133.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
134.    
135.     <DataGridTextColumn Binding="{Binding EntityName}" />
136. </DataGrid.Columns>ResetCheckCurrentAllBinding();<DataGrid.Columns>
137.    
138.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
139.    
140.     <DataGridTextColumn Binding="{Binding EntityName}" />
141. </DataGrid.Columns>checkAllCheckBox.IsEnabled = true;            }        }        private void ResetCheckCurrentAllBinding()        {            //如果列表版本号改变则更新,否则无需更新            if (ownerDatagrid == null || !InnerVersionChanged()) return;            var checkAllBinding = new MultiBinding            {<DataGrid.Columns>
142.    
143.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
144.    
145.     <DataGridTextColumn Binding="{Binding EntityName}" />
146. </DataGrid.Columns>Converter = AllBoolStatusConverter.Default,<DataGrid.Columns>
147.    
148.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
149.    
150.     <DataGridTextColumn Binding="{Binding EntityName}" />
151. </DataGrid.Columns>Mode = BindingMode.TwoWay            };            //基于所有列表显示项创建绑定            var currentItems = ownerDatagrid.Items.OfType().ToList();            foreach (var item in currentItems)            {<DataGrid.Columns>
152.    
153.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
154.    
155.     <DataGridTextColumn Binding="{Binding EntityName}" />
156. </DataGrid.Columns>checkAllBinding.Bindings.Add(CloneBinding((Binding)Binding, item));            }            //清除旧绑定            BindingOperations.ClearBinding(checkAllCheckBox, CheckBox.IsCheckedProperty);            checkAllCheckBox.SetBinding(CheckBox.IsCheckedProperty, checkAllBinding);        }        //创建获取内部列表版本号的委托        private void InitInnerVersionDetect(ItemCollection itemCollection)        {            //Timestamp属性是内部列表的版本号标识,用于表示列表变更的次数            var collectionTimestampProerty = itemCollection.GetType()<DataGrid.Columns>
157.    
158.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
159.    
160.     <DataGridTextColumn Binding="{Binding EntityName}" />
161. </DataGrid.Columns>.GetProperty("Timestamp", BindingFlags.Instance | BindingFlags.NonPublic);            //使用Linq的Expression来构建访问Timestamp属性的委托方法            getInnerEnumeratorVersion = Expression.Lambda(Expression.Property(<DataGrid.Columns>
162.    
163.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
164.    
165.     <DataGridTextColumn Binding="{Binding EntityName}" />
166. </DataGrid.Columns>Expression.Constant(itemCollection),<DataGrid.Columns>
167.    
168.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
169.    
170.     <DataGridTextColumn Binding="{Binding EntityName}" />
171. </DataGrid.Columns>collectionTimestampProerty)).Compile();        }        //检查内部列表是否发生了更新        private bool InnerVersionChanged()        {            var currentInnerVersion = getInnerEnumeratorVersion.Invoke();            if (currentInnerVersion != cachedInnerVersion)            {<DataGrid.Columns>
172.    
173.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
174.    
175.     <DataGridTextColumn Binding="{Binding EntityName}" />
176. </DataGrid.Columns>cachedInnerVersion = currentInnerVersion;<DataGrid.Columns>
177.    
178.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
179.    
180.     <DataGridTextColumn Binding="{Binding EntityName}" />
181. </DataGrid.Columns>return true;            }            return false;        }        //基于已有绑定对象创建一个副本,使用指定的数据源        private static BindingBase CloneBinding(BindingBase bindingBase, object source)        {            switch (bindingBase)            {<DataGrid.Columns>
182.    
183.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
184.    
185.     <DataGridTextColumn Binding="{Binding EntityName}" />
186. </DataGrid.Columns>case Binding binding:<DataGrid.Columns>
187.    
188.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
189.    
190.     <DataGridTextColumn Binding="{Binding EntityName}" />
191. </DataGrid.Columns>    var resultBinding = new Binding<DataGrid.Columns>
192.    
193.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
194.    
195.     <DataGridTextColumn Binding="{Binding EntityName}" />
196. </DataGrid.Columns>    {<DataGrid.Columns>
197.    
198.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
199.    
200.     <DataGridTextColumn Binding="{Binding EntityName}" />
201. </DataGrid.Columns>        Source = source,<DataGrid.Columns>
202.    
203.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
204.    
205.     <DataGridTextColumn Binding="{Binding EntityName}" />
206. </DataGrid.Columns>        AsyncState = binding.AsyncState,<DataGrid.Columns>
207.    
208.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
209.    
210.     <DataGridTextColumn Binding="{Binding EntityName}" />
211. </DataGrid.Columns>        BindingGroupName = binding.BindingGroupName,<DataGrid.Columns>
212.    
213.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
214.    
215.     <DataGridTextColumn Binding="{Binding EntityName}" />
216. </DataGrid.Columns>        BindsDirectlyToSource = binding.BindsDirectlyToSource,<DataGrid.Columns>
217.    
218.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
219.    
220.     <DataGridTextColumn Binding="{Binding EntityName}" />
221. </DataGrid.Columns>        Converter = binding.Converter,<DataGrid.Columns>
222.    
223.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
224.    
225.     <DataGridTextColumn Binding="{Binding EntityName}" />
226. </DataGrid.Columns>        ConverterCulture = binding.ConverterCulture,<DataGrid.Columns>
227.    
228.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
229.    
230.     <DataGridTextColumn Binding="{Binding EntityName}" />
231. </DataGrid.Columns>        ConverterParameter = binding.ConverterParameter,<DataGrid.Columns>
232.    
233.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
234.    
235.     <DataGridTextColumn Binding="{Binding EntityName}" />
236. </DataGrid.Columns>        //ElementName = binding.ElementName,<DataGrid.Columns>
237.    
238.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
239.    
240.     <DataGridTextColumn Binding="{Binding EntityName}" />
241. </DataGrid.Columns>        FallbackValue = binding.FallbackValue,<DataGrid.Columns>
242.    
243.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
244.    
245.     <DataGridTextColumn Binding="{Binding EntityName}" />
246. </DataGrid.Columns>        IsAsync = binding.IsAsync,<DataGrid.Columns>
247.    
248.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
249.    
250.     <DataGridTextColumn Binding="{Binding EntityName}" />
251. </DataGrid.Columns>        Mode = binding.Mode,<DataGrid.Columns>
252.    
253.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
254.    
255.     <DataGridTextColumn Binding="{Binding EntityName}" />
256. </DataGrid.Columns>        NotifyOnSourceUpdated = binding.NotifyOnSourceUpdated,<DataGrid.Columns>
257.    
258.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
259.    
260.     <DataGridTextColumn Binding="{Binding EntityName}" />
261. </DataGrid.Columns>        NotifyOnTargetUpdated = binding.NotifyOnTargetUpdated,<DataGrid.Columns>
262.    
263.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
264.    
265.     <DataGridTextColumn Binding="{Binding EntityName}" />
266. </DataGrid.Columns>        NotifyOnValidationError = binding.NotifyOnValidationError,<DataGrid.Columns>
267.    
268.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
269.    
270.     <DataGridTextColumn Binding="{Binding EntityName}" />
271. </DataGrid.Columns>        Path = binding.Path,<DataGrid.Columns>
272.    
273.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
274.    
275.     <DataGridTextColumn Binding="{Binding EntityName}" />
276. </DataGrid.Columns>        //RelativeSource = binding.RelativeSource,<DataGrid.Columns>
277.    
278.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
279.    
280.     <DataGridTextColumn Binding="{Binding EntityName}" />
281. </DataGrid.Columns>        StringFormat = binding.StringFormat,<DataGrid.Columns>
282.    
283.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
284.    
285.     <DataGridTextColumn Binding="{Binding EntityName}" />
286. </DataGrid.Columns>        TargetNullValue = binding.TargetNullValue,<DataGrid.Columns>
287.    
288.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
289.    
290.     <DataGridTextColumn Binding="{Binding EntityName}" />
291. </DataGrid.Columns>        UpdateSourceExceptionFilter = binding.UpdateSourceExceptionFilter,<DataGrid.Columns>
292.    
293.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
294.    
295.     <DataGridTextColumn Binding="{Binding EntityName}" />
296. </DataGrid.Columns>        UpdateSourceTrigger = binding.UpdateSourceTrigger,<DataGrid.Columns>
297.    
298.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
299.    
300.     <DataGridTextColumn Binding="{Binding EntityName}" />
301. </DataGrid.Columns>        ValidatesOnDataErrors = binding.ValidatesOnDataErrors,<DataGrid.Columns>
302.    
303.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
304.    
305.     <DataGridTextColumn Binding="{Binding EntityName}" />
306. </DataGrid.Columns>        ValidatesOnExceptions = binding.ValidatesOnExceptions,<DataGrid.Columns>
307.    
308.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
309.    
310.     <DataGridTextColumn Binding="{Binding EntityName}" />
311. </DataGrid.Columns>        XPath = binding.XPath,<DataGrid.Columns>
312.    
313.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
314.    
315.     <DataGridTextColumn Binding="{Binding EntityName}" />
316. </DataGrid.Columns>    };<DataGrid.Columns>
317.    
318.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
319.    
320.     <DataGridTextColumn Binding="{Binding EntityName}" />
321. </DataGrid.Columns>    foreach (var validationRule in binding.ValidationRules)<DataGrid.Columns>
322.    
323.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
324.    
325.     <DataGridTextColumn Binding="{Binding EntityName}" />
326. </DataGrid.Columns>    {<DataGrid.Columns>
327.    
328.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
329.    
330.     <DataGridTextColumn Binding="{Binding EntityName}" />
331. </DataGrid.Columns>        resultBinding.ValidationRules.Add(validationRule);<DataGrid.Columns>
332.    
333.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
334.    
335.     <DataGridTextColumn Binding="{Binding EntityName}" />
336. </DataGrid.Columns>    }<DataGrid.Columns>
337.    
338.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
339.    
340.     <DataGridTextColumn Binding="{Binding EntityName}" />
341. </DataGrid.Columns>    return resultBinding;<DataGrid.Columns>
342.    
343.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
344.    
345.     <DataGridTextColumn Binding="{Binding EntityName}" />
346. </DataGrid.Columns>case MultiBinding multiBinding:<DataGrid.Columns>
347.    
348.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
349.    
350.     <DataGridTextColumn Binding="{Binding EntityName}" />
351. </DataGrid.Columns>    var resultMultiBinding = new MultiBinding<DataGrid.Columns>
352.    
353.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
354.    
355.     <DataGridTextColumn Binding="{Binding EntityName}" />
356. </DataGrid.Columns>    {<DataGrid.Columns>
357.    
358.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
359.    
360.     <DataGridTextColumn Binding="{Binding EntityName}" />
361. </DataGrid.Columns>        BindingGroupName = multiBinding.BindingGroupName,<DataGrid.Columns>
362.    
363.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
364.    
365.     <DataGridTextColumn Binding="{Binding EntityName}" />
366. </DataGrid.Columns>        Converter = multiBinding.Converter,<DataGrid.Columns>
367.    
368.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
369.    
370.     <DataGridTextColumn Binding="{Binding EntityName}" />
371. </DataGrid.Columns>        ConverterCulture = multiBinding.ConverterCulture,<DataGrid.Columns>
372.    
373.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
374.    
375.     <DataGridTextColumn Binding="{Binding EntityName}" />
376. </DataGrid.Columns>        ConverterParameter = multiBinding.ConverterParameter,<DataGrid.Columns>
377.    
378.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
379.    
380.     <DataGridTextColumn Binding="{Binding EntityName}" />
381. </DataGrid.Columns>        FallbackValue = multiBinding.FallbackValue,<DataGrid.Columns>
382.    
383.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
384.    
385.     <DataGridTextColumn Binding="{Binding EntityName}" />
386. </DataGrid.Columns>        Mode = multiBinding.Mode,<DataGrid.Columns>
387.    
388.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
389.    
390.     <DataGridTextColumn Binding="{Binding EntityName}" />
391. </DataGrid.Columns>        NotifyOnSourceUpdated = multiBinding.NotifyOnSourceUpdated,<DataGrid.Columns>
392.    
393.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
394.    
395.     <DataGridTextColumn Binding="{Binding EntityName}" />
396. </DataGrid.Columns>        NotifyOnTargetUpdated = multiBinding.NotifyOnTargetUpdated,<DataGrid.Columns>
397.    
398.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
399.    
400.     <DataGridTextColumn Binding="{Binding EntityName}" />
401. </DataGrid.Columns>        NotifyOnValidationError = multiBinding.NotifyOnValidationError,<DataGrid.Columns>
402.    
403.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
404.    
405.     <DataGridTextColumn Binding="{Binding EntityName}" />
406. </DataGrid.Columns>        StringFormat = multiBinding.StringFormat,<DataGrid.Columns>
407.    
408.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
409.    
410.     <DataGridTextColumn Binding="{Binding EntityName}" />
411. </DataGrid.Columns>        TargetNullValue = multiBinding.TargetNullValue,<DataGrid.Columns>
412.    
413.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
414.    
415.     <DataGridTextColumn Binding="{Binding EntityName}" />
416. </DataGrid.Columns>        UpdateSourceExceptionFilter = multiBinding.UpdateSourceExceptionFilter,<DataGrid.Columns>
417.    
418.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
419.    
420.     <DataGridTextColumn Binding="{Binding EntityName}" />
421. </DataGrid.Columns>        UpdateSourceTrigger = multiBinding.UpdateSourceTrigger,<DataGrid.Columns>
422.    
423.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
424.    
425.     <DataGridTextColumn Binding="{Binding EntityName}" />
426. </DataGrid.Columns>        ValidatesOnDataErrors = multiBinding.ValidatesOnDataErrors,<DataGrid.Columns>
427.    
428.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
429.    
430.     <DataGridTextColumn Binding="{Binding EntityName}" />
431. </DataGrid.Columns>        ValidatesOnExceptions = multiBinding.ValidatesOnDataErrors,<DataGrid.Columns>
432.    
433.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
434.    
435.     <DataGridTextColumn Binding="{Binding EntityName}" />
436. </DataGrid.Columns>    };<DataGrid.Columns>
437.    
438.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
439.    
440.     <DataGridTextColumn Binding="{Binding EntityName}" />
441. </DataGrid.Columns>    foreach (var validationRule in multiBinding.ValidationRules)<DataGrid.Columns>
442.    
443.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
444.    
445.     <DataGridTextColumn Binding="{Binding EntityName}" />
446. </DataGrid.Columns>    {<DataGrid.Columns>
447.    
448.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
449.    
450.     <DataGridTextColumn Binding="{Binding EntityName}" />
451. </DataGrid.Columns>        resultMultiBinding.ValidationRules.Add(validationRule);<DataGrid.Columns>
452.    
453.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
454.    
455.     <DataGridTextColumn Binding="{Binding EntityName}" />
456. </DataGrid.Columns>    }<DataGrid.Columns>
457.    
458.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
459.    
460.     <DataGridTextColumn Binding="{Binding EntityName}" />
461. </DataGrid.Columns>    foreach (var childBinding in multiBinding.Bindings)<DataGrid.Columns>
462.    
463.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
464.    
465.     <DataGridTextColumn Binding="{Binding EntityName}" />
466. </DataGrid.Columns>    {<DataGrid.Columns>
467.    
468.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
469.    
470.     <DataGridTextColumn Binding="{Binding EntityName}" />
471. </DataGrid.Columns>        resultMultiBinding.Bindings.Add(CloneBinding(childBinding, source));<DataGrid.Columns>
472.    
473.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
474.    
475.     <DataGridTextColumn Binding="{Binding EntityName}" />
476. </DataGrid.Columns>    }<DataGrid.Columns>
477.    
478.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
479.    
480.     <DataGridTextColumn Binding="{Binding EntityName}" />
481. </DataGrid.Columns>    return resultMultiBinding;<DataGrid.Columns>
482.    
483.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
484.    
485.     <DataGridTextColumn Binding="{Binding EntityName}" />
486. </DataGrid.Columns>case PriorityBinding priorityBinding:<DataGrid.Columns>
487.    
488.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
489.    
490.     <DataGridTextColumn Binding="{Binding EntityName}" />
491. </DataGrid.Columns>    var resultPriorityBinding = new PriorityBinding<DataGrid.Columns>
492.    
493.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
494.    
495.     <DataGridTextColumn Binding="{Binding EntityName}" />
496. </DataGrid.Columns>    {<DataGrid.Columns>
497.    
498.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
499.    
500.     <DataGridTextColumn Binding="{Binding EntityName}" />
501. </DataGrid.Columns>        BindingGroupName = priorityBinding.BindingGroupName,<DataGrid.Columns>
502.    
503.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
504.    
505.     <DataGridTextColumn Binding="{Binding EntityName}" />
506. </DataGrid.Columns>        FallbackValue = priorityBinding.FallbackValue,<DataGrid.Columns>
507.    
508.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
509.    
510.     <DataGridTextColumn Binding="{Binding EntityName}" />
511. </DataGrid.Columns>        StringFormat = priorityBinding.StringFormat,<DataGrid.Columns>
512.    
513.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
514.    
515.     <DataGridTextColumn Binding="{Binding EntityName}" />
516. </DataGrid.Columns>        TargetNullValue = priorityBinding.TargetNullValue,<DataGrid.Columns>
517.    
518.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
519.    
520.     <DataGridTextColumn Binding="{Binding EntityName}" />
521. </DataGrid.Columns>    };<DataGrid.Columns>
522.    
523.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
524.    
525.     <DataGridTextColumn Binding="{Binding EntityName}" />
526. </DataGrid.Columns>    foreach (var childBinding in priorityBinding.Bindings)<DataGrid.Columns>
527.    
528.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
529.    
530.     <DataGridTextColumn Binding="{Binding EntityName}" />
531. </DataGrid.Columns>    {<DataGrid.Columns>
532.    
533.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
534.    
535.     <DataGridTextColumn Binding="{Binding EntityName}" />
536. </DataGrid.Columns>        resultPriorityBinding.Bindings.Add(CloneBinding(childBinding, source));<DataGrid.Columns>
537.    
538.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
539.    
540.     <DataGridTextColumn Binding="{Binding EntityName}" />
541. </DataGrid.Columns>    }<DataGrid.Columns>
542.    
543.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
544.    
545.     <DataGridTextColumn Binding="{Binding EntityName}" />
546. </DataGrid.Columns>    return resultPriorityBinding;<DataGrid.Columns>
547.    
548.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
549.    
550.     <DataGridTextColumn Binding="{Binding EntityName}" />
551. </DataGrid.Columns>default:<DataGrid.Columns>
552.    
553.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
554.    
555.     <DataGridTextColumn Binding="{Binding EntityName}" />
556. </DataGrid.Columns>    throw new NotSupportedException("Failed to clone binding");            }        }        ///         /// 用于合并所有bool值到一个值的多值转换器        ///         private class AllBoolStatusConverter : IMultiValueConverter        {            public static readonly AllBoolStatusConverter Default = new AllBoolStatusConverter();            public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)            {<DataGrid.Columns>
557.    
558.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
559.    
560.     <DataGridTextColumn Binding="{Binding EntityName}" />
561. </DataGrid.Columns>if (values.Length == 0 || values.OfType().Count() != values.Length)<DataGrid.Columns>
562.    
563.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
564.    
565.     <DataGridTextColumn Binding="{Binding EntityName}" />
566. </DataGrid.Columns>    return false;<DataGrid.Columns>
567.    
568.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
569.    
570.     <DataGridTextColumn Binding="{Binding EntityName}" />
571. </DataGrid.Columns>// 检查所有项是否和第一项相同<DataGrid.Columns>
572.    
573.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
574.    
575.     <DataGridTextColumn Binding="{Binding EntityName}" />
576. </DataGrid.Columns>var firstStatus = values.First();<DataGrid.Columns>
577.    
578.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
579.    
580.     <DataGridTextColumn Binding="{Binding EntityName}" />
581. </DataGrid.Columns>foreach (var value in values)<DataGrid.Columns>
582.    
583.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
584.    
585.     <DataGridTextColumn Binding="{Binding EntityName}" />
586. </DataGrid.Columns>{<DataGrid.Columns>
587.    
588.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
589.    
590.     <DataGridTextColumn Binding="{Binding EntityName}" />
591. </DataGrid.Columns>    //如果有不同就返回null,表示第三态<DataGrid.Columns>
592.    
593.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
594.    
595.     <DataGridTextColumn Binding="{Binding EntityName}" />
596. </DataGrid.Columns>    if (!Equals(value, firstStatus))<DataGrid.Columns>
597.    
598.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
599.    
600.     <DataGridTextColumn Binding="{Binding EntityName}" />
601. </DataGrid.Columns>        return null;<DataGrid.Columns>
602.    
603.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
604.    
605.     <DataGridTextColumn Binding="{Binding EntityName}" />
606. </DataGrid.Columns>}<DataGrid.Columns>
607.    
608.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
609.    
610.     <DataGridTextColumn Binding="{Binding EntityName}" />
611. </DataGrid.Columns>return firstStatus;            }            public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)            {<DataGrid.Columns>
612.    
613.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
614.    
615.     <DataGridTextColumn Binding="{Binding EntityName}" />
616. </DataGrid.Columns>//如果汇总的值发生变化则更新所有项目<DataGrid.Columns>
617.    
618.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
619.    
620.     <DataGridTextColumn Binding="{Binding EntityName}" />
621. </DataGrid.Columns>var res = new object[targetTypes.Length];<DataGrid.Columns>
622.    
623.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
624.    
625.     <DataGridTextColumn Binding="{Binding EntityName}" />
626. </DataGrid.Columns>for (int i = 0; i < res.Length; i++)<DataGrid.Columns>
627.    
628.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
629.    
630.     <DataGridTextColumn Binding="{Binding EntityName}" />
631. </DataGrid.Columns>    res[i] = value;<DataGrid.Columns>
632.    
633.     <fc:DataGridCheckAllColumn Binding="{Binding IsChecked}" />
634.    
635.     <DataGridTextColumn Binding="{Binding EntityName}" />
636. </DataGrid.Columns>return res;            }        }        #endregion    }}

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来源:https://www.cnblogs.com/Flithor/archive/2023/12/05/17877473.html
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