public ActionResult AddOrderToBill(string quantity, string foodId)
        {
            string currentUserId = User.Identity.GetUserId();

            if (!String.IsNullOrEmpty(quantity) && !String.IsNullOrEmpty(foodId))
            {
                _customerService.AddOrder(Int32.Parse(quantity), Int32.Parse(foodId), currentUserId);
            }

            int subcategoryId = (int)TempData["subcategoryId"];

            IEnumerable <Food> food = _customerService.GetSubcategoryFood((subcategoryId));

            return(View("Food", food));
        }