TreeView点击树节点中id,名称赋值到文本框中



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

namespace 点击树节点中id赋值到文本框中
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        public bool IsPostBack { get; private set; }

        private void Form1_Load(object sender, EventArgs e)
        {

            if (!this.IsPostBack)//客服分类树表
            {
                DataSet ds = new DataSet();
                SqlDataAdapter da = new SqlDataAdapter("select * from dbo.ServiceClassifyTree", "server=WINDOWS-CBBU2E6;database=OrderManagementSystem;uid=liweilu;pwd=liweilu123;");
                da.Fill(ds);
                DataTable dt = ds.Tables["dbo.ServiceClassifyTree"]; //从数据库里取出数据
                this.treeView1.Nodes.Clear();
                nodes(this.treeView1.Nodes, ds, 0);
                this.treeView1.Nodes[0].Expand();
            }
        }
        private void nodes(TreeNodeCollection tnode, DataSet ds, int id)
        {
            //创建视图 ，应为只有一张表
            DataView dview = new DataView(ds.Tables[0]);
            //视图的好处，在于能方便筛选数据
            dview.RowFilter = "[fid]=" + id + "";
            //显示每个节点的标题,递归！
            foreach (DataRowView row in dview)
            {
                TreeNode node = new TreeNode();
                node.Text = row["name"].ToString();
                tnode.Add(node);
                nodes(node.Nodes, ds, int.Parse(row["id"].ToString()));

            }
        }
        SqlConnection conn;
        private void button1_Click(object sender, EventArgs e)
        {
            textBox1.Text = treeView1.SelectedNode.Text;//得到选中节点文本内容
           textBox3.Text = treeView1.SelectedNode.Parent.Text.ToString();
            textBox4.Text = treeView1.SelectedNode.Parent.Text;
            conn = new SqlConnection("server=WINDOWS-CBBU2E6;database=OrderManagementSystem;Uid = sa; Pwd = 123");

           SqlCommand cmd = new SqlCommand("select id  from dbo.ServiceClassifyTree where name='" + textBox1.Text + "'", conn);
            conn.Open();
            SqlDataReader myReader = cmd.ExecuteReader();

            while (myReader.Read())
            {
                textBox2.Text = myReader.GetValue(0).ToString();
            }
            myReader.Close();
            conn.Close();
        }
    }
}