如何在 DataGridCheckBoxColumn 中添加 Checked 和 Unchecked 事件？

Question

我正在开发一个 C# WPF 项目，我正在寻找一种将 Uncheck 和 Check 事件添加到 datagridCheckboxColumn 的技巧，我已经找到了很多解决方案，但我还没有得到我真正需要的东西。

我的目标是用灰色为每个选中的行着色，并用白色（数据网格的默认颜色）为用户的每个未选中的行着色。

选中行的事件完美运行，当我检查 datagridCheckboxColumn 时，该行被着色。

我正在寻找未选中事件的解决方案。

XAML 代码

<DataGridCheckBoxColumn Header="Choose" x:Name="choose">
                    <DataGridCheckBoxColumn.CellStyle>
                        <Style TargetType="DataGridCell" BasedOn="{StaticResource {x:Type DataGridCell}}">
                            <EventSetter Event="CheckBox.Checked" Handler="OnChecked"/>
                           
                        </Style>
                        
                    </DataGridCheckBoxColumn.CellStyle>
                </DataGridCheckBoxColumn>  

C# 代码

 private void OnChecked(object sender, RoutedEventArgs e)
        {
            for (int i = 0; i < datagridView.Items.Count; i++)
            {
                DataGridRow row = (DataGridRow)datagridView.ItemContainerGenerator.ContainerFromIndex(i);
                CheckBox ch = (CheckBox)datagridView.Columns[0].GetCellContent(row);
                bool ischecked = (bool)ch.IsChecked;

                if (ischecked)
                {
                    row.Background = Brushes.Gray;

                }
                
            }
        }

Answer 1

您可以使用 DataGrid.RowStyle 属性和 DataTriggers：

XAML：

<Window x:Class="WpfApp1.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:local="clr-namespace:WpfApp1"
    mc:Ignorable="d"
    Title="MainWindow" Height="450" Width="800">
<Grid>

    <DataGrid ItemsSource="{Binding Entries}">
        <DataGrid.RowStyle>
            <Style TargetType="{x:Type DataGridRow}">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding IsChecked}"
                                 Value="True">
                        <Setter Property="Background"
                                Value="Gray" />
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </DataGrid.RowStyle>
    </DataGrid>
</Grid>

背后的代码：

using System.Windows;

namespace WpfApp1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
            DataContext = new MainViewModel();
        }
    }
}

MainViewModel：

using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace WpfApp1
{
    public class MainViewModel : INotifyPropertyChanged
    {

        public ObservableCollection<Entry> Entries
        {
            get => entries ?? (entries = new ObservableCollection<Entry>(CreateEntries()));
        }
        ObservableCollection<Entry> entries;

        private List<Entry> CreateEntries()
        {
            return new List<Entry>
            {
                new Entry { Name = "Andy", IsChecked = false },
                new Entry { Name = "Coolman", IsChecked = true },
                new Entry { Name = "Bono", IsChecked = false }
            };
        }

        public void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
        public event PropertyChangedEventHandler PropertyChanged;
    }

    public class Entry : INotifyPropertyChanged
    {

        public bool IsChecked
        {
            get { return isChecked; }
            set
            {
                if (isChecked == value) return;
                isChecked = value;
                OnPropertyChanged();
            }
        }
        bool isChecked;


        public string Name
        {
            get { return name; }
            set
            {
                if (name == value) return;
                name = value;
                OnPropertyChanged();
            }
        }
        string name;

        public void OnPropertyChanged([CallerMemberName] string propertyName = null)
        {
            PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }
        public event PropertyChangedEventHandler PropertyChanged;
    }
}

Answer 2

我找到了这个解决方案，它非常简单：

XAML 代码：

<DataGridCheckBoxColumn Header="Choose" x:Name="choose">
                    <DataGridCheckBoxColumn.CellStyle>
                        <Style TargetType="DataGridCell" BasedOn="{StaticResource {x:Type DataGridCell}}">
                            <EventSetter Event="CheckBox.Checked" Handler="OnChecked"/> 
                            <EventSetter Event="CheckBox.Unchecked" Handler="OnChecked"/> 

                           
                        </Style>
                        
                    </DataGridCheckBoxColumn.CellStyle>
                </DataGridCheckBoxColumn>  

C# 代码

 private void OnChecked(object sender, RoutedEventArgs e)
        {
            for (int i = 0; i < datagridView.Items.Count; i++)
            {
                DataGridRow row = (DataGridRow)datagridView.ItemContainerGenerator.ContainerFromIndex(i);
                CheckBox ch = (CheckBox)datagridView.Columns[0].GetCellContent(row);
                bool ischecked = (bool)ch.IsChecked;

                if (ischecked)
                {
                    row.Background = Brushes.Gray;

                }
                else 
                {
                    row.Background = Burshes.White;
                
            }
        }