public ActionResult ReturnDispatch(string id)
        {
            string strMessage;
            StatisticsSystem stat = new StatisticsSystem();
            bool bSuccess = stat.ReturnDispatchDeliverBill(long.Parse(id), LoginAccountId, LoginStaffName, out strMessage);

            var ret = new
            {
                Success = bSuccess,
                Message = strMessage
            };
            return Json(ret);
        }