C#实现树型结构TreeView节点拖拽的简单功能(转)

private void tvOrganize_ItemDrag(object sender, ItemDragEventArgs e)
        {
            if (this.permissionEdit)
            {
                // 开始进行拖放操作，并将拖放的效果设置成移动。
                this.DoDragDrop(e.Item, DragDropEffects.Move);
            }
        }

        private void tvOrganize_DragEnter(object sender, DragEventArgs e)
        {
            // 拖动效果设成移动
            e.Effect = DragDropEffects.Move;
        }

        private void tvOrganize_DragDrop(object sender, DragEventArgs e)
        {
            // 定义一个中间变量
            TreeNode treeNode;
            //判断拖动的是否为TreeNode类型，不是的话不予处理
            if (e.Data.GetDataPresent("System.Windows.Forms.TreeNode", false))
            {
                // 拖放的目标节点
                TreeNode targetTreeNode;
                // 获取当前光标所处的坐标
                // 定义一个位置点的变量，保存当前光标所处的坐标点
                Point point = ((TreeView)sender).PointToClient(new Point(e.X, e.Y));
                // 根据坐标点取得处于坐标点位置的节点
                targetTreeNode = ((TreeView)sender).GetNodeAt(point);
                // 获取被拖动的节点
                treeNode = (TreeNode)e.Data.GetData("System.Windows.Forms.TreeNode");
                // 判断拖动的节点与目标节点是否是同一个,同一个不予处理
                if (BaseInterfaceLogic.TreeNodeCanMoveTo(treeNode, targetTreeNode))
                {
                    if (BaseSystemInfo.ShowInformation)
                    {
                        // 是否移动部门
                        if (MessageBox.Show(AppMessage.Format(AppMessage.MSG0038, treeNode.Text, targetTreeNode.Text), AppMessage.MSG0000, MessageBoxButtons.YesNo, MessageBoxIcon.Question) == DialogResult.No)
                        {
                            return;
                        }
                    }
                    ServiceManager.Instance.OrganizeService.MoveTo(UserInfo, treeNode.Tag.ToString(), targetTreeNode.Tag.ToString());
                    // 往目标节点中加入被拖动节点的一份克隆
                    targetTreeNode.Nodes.Add((TreeNode)treeNode.Clone());
                    // 将被拖动的节点移除
                    treeNode.Remove();
                }
            }
        }