WPF DataGrid的“拖放和复制”

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        dataGrid.PreviewMouseLeftButtonDown += new MouseButtonEventHandler(dataGrid_PreviewMouseLeftButtonDown);
        dataGrid.Drop += new DragEventHandler(dataGrid_Drop);
    }

    private void dataGrid_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        // 获取被拖动的行
        var row = ItemsControl.ContainerFromElement((DataGrid)sender, e.OriginalSource as DependencyObject) as DataGridRow;
        if (row != null)
        {
            // 开始拖动操作
            DragDrop.DoDragDrop(row, row.Item, DragDropEffects.Move);
        }
    }

    private void dataGrid_Drop(object sender, DragEventArgs e)
    {
        // 获取被拖动的数据
        var data = e.Data.GetData(typeof(YourDataType)) as YourDataType;
        if (data != null)
        {
            // 移除被拖动的数据
            (dataGrid.ItemsSource as ObservableCollection<YourDataType>).Remove(data);
            // 添加被拖动的数据到新的位置
            (dataGrid.ItemsSource as ObservableCollection<YourDataType>).Insert(GetDropIndex(e), data);
        }
    }

    private int GetDropIndex(DragEventArgs e)
    {
        // 获取拖放的目标行
        var target = ItemsControl.ContainerFromElement(dataGrid, e.OriginalSource as DependencyObject) as DataGridRow;
        if (target != null)
        {
            // 返回目标行的索引
            return dataGrid.ItemContainerGenerator.IndexFromContainer(target);
        }
        else
        {
            // 如果没有目标行，返回最后一个索引
            return dataGrid.Items.Count - 1;
        }
    }
}