public IHttpActionResult PostOrder(Order order)
        {
            if (!ModelState.IsValid)
              {
            return BadRequest(ModelState);
              }

              db.Orders.Add(order);
              db.SaveChanges();

              return CreatedAtRoute("DefaultApi", new { id = order.Id }, order);
        }
        public HttpResponseMessage PostOrder(OrderDTO dto)
        {
            if (ModelState.IsValid)
              {
            var order = new Order()
            {
              Customer = User.Identity.Name,
              OrderDetails = (from item in dto.Details
                              select new OrderDetail() { PartId = item.PartID, Quantity = item.Quantity }).ToList()
            };

            db.Orders.Add(order);
            db.SaveChanges();

            HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, order);
            response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = order.Id }));
            return response;
              }
              else
              {
            return Request.CreateResponse(HttpStatusCode.BadRequest);
              }
        }
        // PUT api/Default1/5
        public IHttpActionResult PutOrder(int id, Order order)
        {
            if (!ModelState.IsValid)
              {
            return BadRequest(ModelState);
              }

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

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

              try
              {
            db.SaveChanges();
              }
              catch (DbUpdateConcurrencyException)
              {
            if (!OrderExists(id))
            {
              return NotFound();
            }
            else
            {
              throw;
            }
              }

              return StatusCode(HttpStatusCode.NoContent);
        }