public async Task <Cart> CalculateCartAsync( TaxType taxType, ICatalogGateway catalogGateway, IPromoGateway promoGateway, IShippingGateway shippingGateway) { if (CartItems != null && CartItems?.Count() > 0) { CartItemTotal = 0.0D; foreach (var cartItem in CartItems) { var product = await catalogGateway.GetProductByIdAsync(cartItem.Product.ProductId); if (product == null) { throw new Exception("Could not find product."); } cartItem .FillUpProductInfo(product.Name, product.Price, product.Desc) .ChangePrice(product.Price); CartItemPromoSavings = CartItemPromoSavings + cartItem.PromoSavings * cartItem.Quantity; CartItemTotal = CartItemTotal + cartItem.Product.Price * cartItem.Quantity; } shippingGateway.CalculateShipping(this); } promoGateway.ApplyShippingPromotions(this); switch (taxType) { case TaxType.NoTax: CartTotal = CartItemTotal + ShippingTotal; break; case TaxType.TenPercentage: var cartTotal = CartItemTotal + ShippingTotal; CartTotal = cartTotal * 10 / 100 + cartTotal; break; default: throw new ArgumentOutOfRangeException(nameof(taxType), taxType, null); } return(this); }
public ActionResult AddToCart(int albumId) { CartItem inCartItem = CartItems.FirstOrDefault(item => item.Album.Id == albumId); if (inCartItem != null) { inCartItem.Amount = ++inCartItem.Amount; } else { var item = new CartItem { Id = CartItems.Count() > 0?CartItems.Last().Id + 1:1, Album = db.Albums.Find(albumId), Amount = 1 }; CartItems.Add(item); } return(RedirectToAction("Index")); }