c# 实现鼠标拖动TreeView节点

private void TVdepartment_ItemDrag(object sender, ItemDragEventArgs e)//左键拖动

        {

            if (e.Button == MouseButtons.Left)

            {

                DoDragDrop(e.Item, DragDropEffects.Move); 

            }

        }

        private void TVdepartment_DragEnter(object sender, DragEventArgs e)

        {

            if (e.Data.GetDataPresent("System.Windows.Forms.TreeNode"))

            {

                e.Effect = DragDropEffects.Move;

            }

            else

            {

                e.Effect = DragDropEffects.None;

            }

        }

    private void TVdepartment_DragDrop(object sender, DragEventArgs e)//拖动

        {    //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.TVdepartment.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.Parent.Nodes.Insert(targeNode.Index, NewMoveNode);

            }

            else

            {

                targeNode.Nodes.Insert(targeNode.Nodes.Count, NewMoveNode);

            }

            //更新当前拖动的节点选择

            TVdepartment.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();

        }

转载于:https://www.cnblogs.com/hongzhi/archive/2009/06/26/1511529.html