public ActionResult SimpleProduct(int id)
        {
            var products_service = new ProductsService();
            //var discounts_service = new DiscountsService();  目前沒折扣資料 先不抓
            var size_service       = new SizeService();
            var stockcolor_service = new StockColorService();
            //var image_service = new ImageService();  沒照片 不抓

            var list = new List <SizeStockCombineViewModel>();

            foreach (var i in products_service.GetProductsTable())
            {
                if (id == i.ProductID)
                {
                    ViewBag.ProductName = i.ProductName;

                    ViewBag.ProductID = i.ProductID;
                    ViewBag.UnitPrice = i.UnitPrice;
                    break;
                }
            }

            var size       = size_service.GetSizeTable().Where(x => x.ProductID == id).ToList();
            var stockcolor = stockcolor_service.GetStockColorsTable(id).ToList();

            list.Add(new SizeStockCombineViewModel()
            {
                Size       = size,
                StockColor = stockcolor
            });

            return(View(list));
        }