TREEVIEW节点拖拽

 
 
 
假设把A节点往B节点上拖拽
那么 
A 为Node1,B为Node2
 
 
       private void Form1_Load(object senderEventArgs e)
        {
            treeView1.AllowDrop = true;
    treeView1.HideSelection = false;
        }
 
 
 
        private TreeNode node1 = null//node1  当前选中的那个节点
        private void treeView1_ItemDrag(object senderItemDragEventArgs e)
        {  
            node1 = (TreeNode)e.Item;
             DoDragDrop(e.ItemDragDropEffects.Move);  
        }
 
         private void treeView1_DragOver(object senderDragEventArgs e)
        {
            TreeNode node2 = treeView1.GetNodeAt(treeView1.PointToClient(new Point(e.Xe.Y)));
            //节点2不存在
            //节点1 = 节点2
            //节点1 往它的父一级节点拖拽
            if ((node2 == null) || (node1 == node2) || (node1.Parent == node2))
            {
                treeView1.SelectedNode = node1;
                SetTreeNodeColorDefault();
                e.Effect = DragDropEffects.None;
                return;
            }
            else
            {
                e.Effect = DragDropEffects.Move;
                treeView1.SelectedNode = node2;
                SetTreeNodeColorBlue();
 
                //当一个父节点往它的子节点中拖拽时
                while (node2.Parent != null)
                {
                    if (node2.Parent == node1)
                    {
                        e.Effect = DragDropEffects.None;
                        return;
                    }
                    node2 = node2.Parent;
                }
            }
        }
 
         private void treeView1_DragDrop(object senderDragEventArgs e)
        {
            TreeNode node2 = treeView1.GetNodeAttreeView1.PointToClient(new Point(e.Xe.Y)) );
            if (node1 != node2)
            {
                if (node1.Parent != node2)
                {
                    textBox1.Text = textBox3.Text + "\\" + node1.FullPath;
                    textBox2.Text = textBox3.Text + "\\" + node2.FullPath;           
                    ///MessageBox.Show("Finished");
                    if (node1.Parent == null)
                        treeView1.Nodes.Remove(node1);
                    else
                        node1.Parent.Nodes.Remove(node1);
 
                    node2.Nodes.Add(node1);
                    node2.Expand();
                }
            }
        }
 
//设置颜色部分
       private void treeView1_MouseDown(object senderMouseEventArgs e)
        {
            SetTreeNodeColorDefault();
        }
 
         private void SetTreeNodeColorBlue()
        {
            if (node1 != null)
            {
                node1.BackColor = Color.FromArgb(51, 153, 255);//蓝色 
                node1.ForeColor = Color.White;
            }
        }
 
 
       private void SetTreeNodeColorDefault()
        {
            if (node1 != null)
            {
                node1.BackColor = SystemColors.Window;
                node1.ForeColor = Color.Black;
            }
        }
 
 
 
 





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posted @ 2013-11-06 20:49  XE2011  阅读(642)  评论(1编辑  收藏  举报