// POST api/PurchaseRequisitionDescription
        public HttpResponseMessage PostPurchaseRequisitionDescription(PurchaseRequisitionDescription purchaserequisitiondescription)
        {
            if (ModelState.IsValid)
            {
                purchaserequisitiondescription.InsertBy = loginUser.UserID;
                db.Entry(purchaserequisitiondescription).State = purchaserequisitiondescription.PurchaseRequisitionDescriptionID == 0 ? EntityState.Added : EntityState.Modified;
                db.SaveChanges();

                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, purchaserequisitiondescription);
                response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = purchaserequisitiondescription.PurchaseRequisitionDescriptionID }));
                return response;
            }
            else
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }
        }
        // PUT api/PurchaseRequisitionDescription/5
        public HttpResponseMessage PutPurchaseRequisitionDescription(long id, PurchaseRequisitionDescription purchaserequisitiondescription)
        {
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            if (id != purchaserequisitiondescription.PurchaseRequisitionDescriptionID)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }
            purchaserequisitiondescription.UpdateBy = loginUser.UserID;

            db.Entry(purchaserequisitiondescription).State = EntityState.Modified;

            try
            {
                db.SaveChanges();
            }
            catch (DbUpdateConcurrencyException ex)
            {
                return Request.CreateErrorResponse(HttpStatusCode.NotFound, ex);
            }

            return Request.CreateResponse(HttpStatusCode.OK);
        }