private int draptype=1;//1：不同级， 不为1：拖同级 private void treeView1_ItemDrag(object sender, ItemDragEventArgs e) { if (e.Button == MouseButtons.Left) { DoDragDrop(e.Item, DragDropEffects.Move); } } private void treeView1_DragEnter(object sender, DragEventArgs e) { if (e.Data.GetDataPresent(typeof(TreeNode))) e.Effect = DragDropEffects.Move; else e.Effect = DragDropEffects.None; } private void treeView1_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 = ((TreeView)sender).PointToClient(new Point(e.X, e.Y)); TreeNode targetNode = treeView1.GetNodeAt(pt); //如果目标节点为分组则添加到下级节点的未端,如果目标节点为素材文件则添加为同级节点 TreeNode NewMoveNode = (TreeNode)moveNode.Clone(); if (draptype == 1) { targetNode.Nodes.Insert(targetNode.Nodes.Count, NewMoveNode); } else { if (moveNode.NextNode == targetNode) { targetNode.Parent.Nodes.Insert(targetNode.Index + 1, NewMoveNode); } else { targetNode.Parent.Nodes.Insert(targetNode.Index, NewMoveNode); } } //更新当前拖动的节点选择 treeView1.SelectedNode = NewMoveNode; //展开目标节点,便于显示拖放效果 targetNode.Expand(); //移除拖放的节点 moveNode.Remove(); }
WinForm中TreeView控件实现鼠标拖动节点(可实现同级节点位置互换，，或拖到目标子节点)