WPF Datagrid：将 SelectedCells 绑定到我的 ViewModel 的 MVVM 友好方式

一篇关于将WPF DataGrid的SelectedCells绑定到ViewModel的MVVM友好方式的文章，并添加案例代码。文章分为以下几个段落：

csharp
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Interactivity;
namespace MyApplication
{
    public class DataGridSelectedCellsBehavior : Behavior
    {
        protected override void OnAttached()
        {
            base.OnAttached();
            AssociatedObject.SelectionChanged += OnSelectionChanged;
        }
        protected override void OnDetaching()
        {
            base.OnDetaching();
            AssociatedObject.SelectionChanged -= OnSelectionChanged;
        }
        private void OnSelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            var dataGrid = sender as DataGrid;
            if (dataGrid != null)
            {
                var viewModel = dataGrid.DataContext as MyViewModel;
                if (viewModel != null)
                {
                    viewModel.SelectedCells = dataGrid.SelectedCells;
                }
            }
        }
    }
}

xaml
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
        xmlns:local="clr-namespace:MyApplication"
        Title="MainWindow" Height="450" Width="800">
    
                          SelectionMode="Extended">
            
                
            
        
    

csharp
using System.Collections.ObjectModel;
using System.Windows.Controls;
namespace MyApplication
{
    public class MyViewModel
    {
        public ObservableCollection SelectedCells { get; set; }
        // 其他代码...
    }
}