using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {

            binding();
        }
    }
    private void binding()
    {
        DataTable tblData = new DataTable();
        DataColumn col1 = new DataColumn("Data1");
        tblData.Columns.Add(col1);

        for (int i = 1; i <= 1500; i++)
        {
            DataRow dr = tblData.NewRow();
            dr["Data1"] = i;
            tblData.Rows.Add(dr);
        }
        GridView1.DataSource = tblData;
        GridView1.DataBind();
    }
    protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Pager)
        {
            Menu pgmenu =(Menu) e.Row.FindControl("Menu1");
            int startno, endno;
            int selectedpgeno = -1;
            if (ViewState["selectedpgno"] == null)
            {
                startno = 1;
                endno = startno + 9;
            }
            else
            {
                selectedpgeno = Convert.ToInt32(ViewState["selectedpgno"]);
                if ((selectedpgeno - 10) <= 0)
                {
                    startno = 1;
                    endno = selectedpgeno + 9;
                }
                else
                {
                    startno = selectedpgeno - 10;
                    endno = selectedpgeno + 9;
                }
            }

            for (int i = startno; i <= endno; i++)
            {
                pgmenu.Items.Add(new MenuItem(i.ToString(), (i - 1).ToString()));
            }
        }
    }
    protected void Menu1_MenuItemClick(object sender, MenuEventArgs e)
    {
        ViewState.Add("selectedpgno", e.Item.Text);
        GridView1.PageIndex = Convert.ToInt32(e.Item.Value);
        binding();
    }
    protected void Navigate(object sender, CommandEventArgs e)
    {
        if (e.CommandName == "Next")
        {            
            ViewState.Add("selectedpgno", GridView1.PageIndex + 1);
            GridView1.PageIndex = Convert.ToInt32(GridView1.PageIndex + 1);
            binding();
        }
    }
}