مشکل این کد چیه فقط یک رکورد تو بانک قرار میگیره

[programer1389]

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.Windows.Forms;

using System.Data.OleDb;

namespace WindowsFormsApplication2

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

 

            SqlConnection conn =new SqlConnection();

            conn.ConnectionString=@"data source=mydb-79be705532\sqlexpress;initial catalog=model;integrated security=true";

            conn.Open();

            string str_tsql = "select id,tel,name from table1";

            SqlCommand cmd=new SqlCommand(str_tsql,conn);

            SqlDataReader sqlreader = cmd.ExecuteReader(CommandBehavior.CloseConnection)  ;

            sqlreader.Read();

            OleDbConnection conn2 = new OleDbConnection();

            conn2.ConnectionString = @"provider=microsoft.jet.oledb.4.0;" + @"data source=d:\northwind1.mdb;";

            OleDbDataAdapter da = new OleDbDataAdapter();

            da.InsertCommand = new OleDbCommand();

            da.InsertCommand.Connection = conn2;

 

                while (sqlreader.Read())

                {    

                    da.InsertCommand.CommandText = "insert into table1 (id,tel,name) values (@id,@tel,@name)";

                    da.InsertCommand.Parameters.AddWithValue("id"   , sqlreader[0].ToString().Trim());

                    da.InsertCommand.Parameters.AddWithValue("tel"  , sqlreader[1].ToString().Trim());

                    da.InsertCommand.Parameters.AddWithValue("name" , sqlreader[2].ToString().Trim());

                    da.InsertCommand.Connection.Open();

                    da.InsertCommand.ExecuteNonQuery();

                    da.InsertCommand.Connection.Close();                   

                }

 

                sqlreader.Close();

 

 

           }

        }

    }