protected override void OnDrop(DragEventArgs e)
{
if (DragDropTool != null)
{
DragDropTool.OnDrop(e);
}
base.OnDrop(e);
}
/// <summary>
/// 当拖动结束
/// </summary>
/// <param name="e"></param>
protected override void OnDragOver(DragEventArgs e)
{
if (DragDropTool != null)
DragDropTool.OnDragOver(e);
base.OnDragOver(e);
}