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 WindowsFormsApplication112 {13     public partial class Form1 : Form14     {15         public Form1()16         {17             InitializeComponent();18         }19 20         private void button1_Click(object sender, EventArgs e)21         {22             //控件:treeview123             //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.text27             treeView1.SelectedNode.Nodes.Add(textBox2.Text);28         }29     }30 }