public IHttpActionResult PostcatCustomer(CatCustomerViewModel Cat_CustomerView_Model)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            catCustomer catCustomer_db;
            try
            {
                catCustomer_db = new catCustomer { Id = Cat_CustomerView_Model.Id, No = Cat_CustomerView_Model.No, Name = Cat_CustomerView_Model.Name };
                db.catCustomers.Add(catCustomer_db);
                db.SaveChanges();
            }
            catch (DbEntityValidationException ex)
            {
                throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.InternalServerError, "DbEntityValidationException:" + ex.Message));
            }
            catch (Exception ex)
            {
                throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.InternalServerError, ex.Message));
            }

            return CreatedAtRoute("DefaultApi", new { id = catCustomer_db.Id }, ToViewModel(catCustomer_db));
        }
        public IHttpActionResult PutcatCustomer(int id, CatCustomerViewModel Cat_CustomerView_Model)
        {
            if (!ModelState.IsValid)
            {
                return BadRequest(ModelState);
            }

            if (id != Cat_CustomerView_Model.Id)
            {
                return BadRequest();
            }

            //把資料庫中的那筆資料讀出來
            var catCustomer_db = db.catCustomers.Find(id);
            if (catCustomer_db == null)
            {
                return ResponseMessage(Request.CreateErrorResponse(HttpStatusCode.NotFound, "這筆資料已被刪除!"));
            }
            else
            {
                try
                {
                    catCustomer_db.Id = Cat_CustomerView_Model.Id;
                    catCustomer_db.No = Cat_CustomerView_Model.No;
                    catCustomer_db.Name = Cat_CustomerView_Model.Name;
                    db.Entry(catCustomer_db).OriginalValues["Timestamp"] = Convert.FromBase64String(Cat_CustomerView_Model.TimestampString);
                    db.SaveChanges();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!catCustomerExists(id))
                        throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotFound, "這筆資料已被刪除!"));
                    else
                        throw new HttpResponseException(Request.CreateErrorResponse(HttpStatusCode.Conflict, "這筆資料已被其他人修改!"));// ""
                }
            }

            return Ok(ToViewModel(catCustomer_db));
        }