新建一个WindowsApplication项目,命名为WinTreeViewTip,打开窗体Form1,将TreeView控件拖到界面中,名为treeView1 双击Form1进入后台代码页 首先加入一个ToolTip对象,命名为nodeTip: private ToolTip nodeTip = null; 然后在Form1的构造函数中进行初始化设置:
this.nodeTip = new System.Windows.Forms.ToolTip();
this.nodeTip.InitialDelay = 300;
this.nodeTip.ReshowDelay = 0; //为测试添加节点 treeView1.Nodes.Add(new TreeNode("test1")); treeView1.Nodes.Add(new TreeNode("test2")); treeView1.Nodes.Add(new TreeNode("test3")); treeView1.Nodes.Add(new TreeNode("test4"));
在InitializeComponent方法中为treeView1添加MouseMove和MouseLeave事件: // treeView1 this.treeView1.MouseMove += new System.Windows.Forms.MouseEventHandler(this.treeView1_MouseMove); this.treeView1.MouseLeave += new System.EventHandler(this.treeView1_MouseLeave);
在treeView1_MouseLeave和treeView1_MouseMove添加如下代码: private void treeView1_MouseLeave(object sender, System.EventArgs e) { nodeTip.Active = true; }
private void treeView1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e) { TreeNode node = treeView1.GetNodeAt(e.X,e.Y); if(node == null){ nodeTip.Active = false; } else{ nodeTip.SetToolTip((TreeView)sender,node.Text); nodeTip.Active = true; } }

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