protected void btn_Order_Click(object sender, ImageClickEventArgs e) { foreach (GridViewRow row in grvPhoneBook.Rows) { TextBox textOrder = (TextBox)row.FindControl("txtOrder"); int cOrder = Convert.ToInt32(textOrder.Text); int ID = Convert.ToInt32(row.Cells[0].Text); BSO.PhoneBookBSO objBSO = new PhoneBookBSO(); objBSO.PhoneBookUpOrder(ID, cOrder); } BindData(); }