custom paging values not able to set properly

t not bale to set the firts / next, prev, last

& record values properly

i have used session variables for this

i have

pagesize=100;

 Session["TotalRows"] = GetTotalRows();                 Session["LastPageIndex"] = Convert.ToInt32(Session["TotalRows"]) / pagesize;                 int pageindex = Convert.ToInt32(Session["PageIndex"]);

 public int GetTotalRows()
        {

            SqlCommand com = new SqlCommand("select count(*) from tbl", conn);
            conn.Open();
            SqlDataReader reader = com.ExecuteReader(CommandBehavior.SingleRow);
            reader.Read();
            int totalRows = Convert.ToInt32(reader[0]);
            conn.Close();
            return totalRows;

        }