C#WinForm treeview控件 选中一个根节点为其添加子节点

 1 using System;
 2 using System.Collections.Generic;
 3 using System.ComponentModel;
 4 using System.Data;
 5 using System.Drawing;
 6 using System.Linq;
 7 using System.Text;
 8 using System.Threading.Tasks;
 9 using System.Windows.Forms;
10 
11 namespace WindowsFormsApplication1
12 {
13     public partial class Form1 : Form
14     {
15         public Form1()
16         {
17             InitializeComponent();
18         }
19 
20         private void button1_Click(object sender, EventArgs e)
21         {
22             //控件:treeview1
23             //selectnodes选中的结点
24             //nodes结点
25             //add添加新的结点
26             //结点的名称为textbox2.text
27             treeView1.SelectedNode.Nodes.Add(textBox2.Text);
28         }
29     }
30 }