public IActionResult OnPost() { int click = Int32.Parse(Request.Form["click"]); if (click == 1) { Product = ProductsDB.GetProduct(Product.Id, _configuration); string currentShoppingCart = Request.Cookies["ShoppingCart"]; string newShoppingCart = ProductsCookies.AddProduct(Product, currentShoppingCart); var cookieOptions = new CookieOptions { Expires = DateTime.Now.AddDays(1) }; Response.Cookies.Append("ShoppingCart", newShoppingCart, cookieOptions); } return(RedirectToPage("/Index")); }