How to indexing GridView record in runtime....

// how  to  indexing  gridviw record

protected void GridView1_RowDataBound(object sender, GridViewRowEventArgs e)

    

{

   if (e.Row.RowType == DataControlRowType.DataRow)

        

{

    

((Label)e.Row.Cells[0].Controls[1]).Text =

(Convert.ToInt32(e.Row.RowIndex)+1).ToString();

}

    }