public string UpdateReturnProductCard(string qcReturnNo, string serialNo, string userid, out int totalBox) { totalBox = -1; string result = string.Empty; try { using (QCReturnBLL qcREturnBll = new QCReturnBLL()) { result = qcREturnBll.UpdateReturnProductCard(qcReturnNo, serialNo, userid, out totalBox); } } catch (Exception ex) { result = ex.Message; } return(result); }