public RedirectToRouteResult AddToCart(int id) { var product = repository.GetProducts().FirstOrDefault(p => p.ProductId == id); //var product = db.Products.FirstOrDefault(p => p.ProductId == id); if (product != null) { var userInfoId = User.Identity.GetUserId(); var cartLine = repository.GetAll().SingleOrDefault(c => c.UserInfoId == userInfoId && c.ProductId == product.ProductId); //var userInfoId = User.Identity.GetUserId(); //var cartLine = db.CartLines.SingleOrDefault(c => c.UserInfoId == userInfoId // && c.ProductId == product.ProductId); if (cartLine == null) { //db.CartLines.Add(new CartLine repository.Add(new CartLine { UserInfoId = userInfoId, Product = product, Quantity = 1 }); } else { cartLine.Quantity++; } repository.Save(); //db.SaveChanges(); } return(RedirectToAction("Index")); }