using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection.Emit;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsTreeView
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            TreeNode tn1 = treeView1.Nodes.Add("名称");
            TreeNode Ntn1 = new TreeNode("支付宝");
            TreeNode Ntn2 = new TreeNode("微信支付");
            TreeNode Ntn3 = new TreeNode("京东白条");
            tn1.Nodes.Add(Ntn1);
            tn1.Nodes.Add(Ntn2);
            tn1.Nodes.Add(Ntn3);
        }

        private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
        {
            label1.Text = "当前选中的节点：" + e.Node.Text;
            //其中e表示被选中节点的参数，Node表示被选中的节点（是一个TreeNode实例）
        }
    }
}