public IHttpActionResult GetPurchaseOrderByPODate(DateTime podate)
        {
            string error = "";
            List <PurchaseOrderModel> orms =
                PurchaseOrderRepo.GetPurchaseOrderByPODate(podate, out error);

            if (error != "" || orms == null)
            {
                if (error == ConError.Status.NOTFOUND)
                {
                    return(Content(HttpStatusCode.NotFound, "PO Not Found"));
                }
                return(Content(HttpStatusCode.BadRequest, error));
            }
            return(Ok(orms));
        }