without paging my gridview

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using System;
using System.Collections.Generic;
//using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;

public partial class Paging : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        BindData();
    }

    protected void BindData()
    {
        string strConnection = "Data Source=localhost\\sqlexpress;Initial Catalog=Divin;Integrated Security=True";
        SqlConnection con = new SqlConnection(strConnection);
        SqlCommand cmd = new SqlCommand("select * from userinfo", con);
        DataSet ds = new DataSet();
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        da.Fill(ds);
        GridView2.DataSource = ds;
        GridView2.DataBind();
        con.Close();
    }
    protected void GridView1_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        GridView2.PageIndex = e.NewPageIndex;
        BindData();
    }

}