c# 实现鼠标拖拽TreeView节点 [转]

 // 2009-08-25 Jacky
        private void treeView2_ItemDrag(object sender, ItemDragEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                DoDragDrop(e.Item, DragDropEffects.Move);
            }
        }

        private void treeView2_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent("System.Windows.Forms.TreeNode"))
            {
                e.Effect = DragDropEffects.Move;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }

        private void treeView2_DragDrop(object sender, DragEventArgs e)
        {
            //获得拖放中的节点
            TreeNode moveNode = (TreeNode)e.Data.GetData("System.Windows.Forms.TreeNode");
            //根据鼠标坐标确定要移动到的目标节点
            Point pt;
            TreeNode targeNode;
            pt = ((TreeView)(sender)).PointToClient(new Point(e.X, e.Y));
            targeNode = this.treeView2.GetNodeAt(pt);
            //如果目标节点无子节点则添加为同级节点,反之添加到下级节点的未端
            TreeNode NewMoveNode = (TreeNode)moveNode.Clone();
            //if (targeNode.Nodes.Count == 0)
            //{
            //    targeNode.Nodes.Insert(targeNode.Index, NewMoveNode);
            //}
            //else
            //{
            targeNode.Nodes.Insert(targeNode.Nodes.Count, NewMoveNode);
            //}
            //更新当前拖动的节点选择
            //treeView2.SelectedNode = NewMoveNode;
            //展开目标节点,便于显示拖放效果
            targeNode.Expand();

            //移除拖放的节点
            moveNode.Remove();
        }