How to bind data base value to Treeview control using C#

How to bind data base value to Treeview control using C#
Just drag and drop one tree view control to windows form.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Data.SqlClient;
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection("USER=userid;PASSWORD=password;SERVER=servername;DATABASE=database");
            string SQLQuery;
            SQLQuery = "select tablename,displayname from Tablename";
            DataSet ds=new DataSet();
            SqlDataAdapter da=new SqlDataAdapter(SQLQuery,con);
            da.Fill(ds);
            foreach ( DataRow Row in ds.Tables[0].Rows)
            {
                TreeNode Tnode = new TreeNode("ParentNode");
                treeView1.Nodes.Add(Tnode);
                TreeNode CNode1 = new TreeNode(Row["tablename"].ToString());
                Tnode.Nodes.Add(CNode1);
                TreeNode CNode2 = new TreeNode(Row["displayname"].ToString());
                Tnode.Nodes.Add(CNode2);
            }

               
        }
    }
}