//// GET api/CheckoutItem
        //public IEnumerable<CheckoutItem> GetCheckoutItems()
        //{
        //    return db.ShoppingItems.AsEnumerable();
        //}
        //// GET api/CheckoutItem/5
        //public CheckoutItem GetCheckoutItem(int id)
        //{
        //    CheckoutItem checkoutitem = db.ShoppingItems.Find(id);
        //    if (checkoutitem == null)
        //    {
        //        throw new HttpResponseException(Request.CreateResponse(HttpStatusCode.NotFound));
        //    }
        //    return checkoutitem;
        //}
        // PUT api/CheckoutItem/5
        public HttpResponseMessage PutCheckoutItem(int id, CheckoutItem checkoutitem)
        {
            if (!ModelState.IsValid)
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }

            if (id != checkoutitem.CheckoutItemId)
            {
                return Request.CreateResponse(HttpStatusCode.BadRequest);
            }

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

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

            return Request.CreateResponse(HttpStatusCode.OK);
        }
 public CheckoutItemDto(CheckoutItem item)
 {
     CategoryId = item.CategoryId;
     ProductId = item.ProductId;
     Quantity = item.Quantity;
     //CheckoutListId = item.CheckoutListId;
 }
        // POST api/CheckoutItem
        public HttpResponseMessage PostCheckoutItem(CheckoutItem[] checkoutitems)
        {
            if (ModelState.IsValid)
            {
                //db.ShoppingItems.Add(checkoutitem);
                db.SaveChanges();

                HttpResponseMessage response = Request.CreateResponse(HttpStatusCode.Created, checkoutitems);
                response.Headers.Location = new Uri(Url.Link("DefaultApi", new { id = checkoutitems }));
                return response;
            }
            else
            {
                return Request.CreateErrorResponse(HttpStatusCode.BadRequest, ModelState);
            }
        }