public void OnGet()
        {
            List <int> cart = HttpContext.Session.GetObjectFromJson <List <int> >("cart");

            if (cart != null)
            {
                Records = RecordRep.GetRecordsInCart(cart);
            }
        }
        public IActionResult OnPostBuy()
        {
            List <int>    cart    = HttpContext.Session.GetObjectFromJson <List <int> >("cart");
            List <record> records = RecordRep.GetRecordsInCart(cart);
            int           buyerId = Convert.ToInt32(Request.Cookies["user_id"]);

            if (cart != null)
            {
                RecordRep.RecordSold(cart, buyerId);
                Record_For_SaleRep.RecordSold(records, buyerId);
            }

            HttpContext.Session.Remove("cart");
            return(RedirectToPage("/Paginas/MyCollection"));
        }