树行控件TreeView 在WinForm下 怎么实现重命名功能

public  Form1()
{
    InitializeComponent();
    this .Load+= new  EventHandler(Form1_Load);
    treeView1.MouseClick+= new  MouseEventHandler(treeView1_MouseClick);
    treeView1.AfterLabelEdit+= new  NodeLabelEditEventHandler(treeView1_AfterLabelEdit);
}

private  void  Form1_Load( object  sender, EventArgs e)
{
    for  ( int  i = 0; i < 10; i++)
    {
        treeView1.Nodes.Add( "tv"  + i.ToString());
        treeView1.Nodes[i].Nodes.Add( "tvc" +i.ToString());
    }
    treeView1.LabelEdit =  true ; //不可缺少
}

private  void  treeView1_MouseClick( object  sender, MouseEventArgs e)
{
    TreeView tv=(TreeView)sender; //获取treeview
    if  (e.Button == MouseButtons.Right) //判断是否鼠标右键
    {
        if  (tv.SelectedNode !=  null ) //判断是否存在选择节点
            tv.SelectedNode.BeginEdit();
    }
}
private  void  treeView1_AfterLabelEdit( object  sender, NodeLabelEditEventArgs e)
{
    string  newTxt = e.Label; //获取新文本
    //string id = e.Node.Text;//获取原来的文本

    //进行你的更新操作

}