protected override void OnActionExecuting(ActionExecutingContext filterContext)
 {
     cart = new ProductCart(HttpContext, "ShoppingCart");
     ViewBag.AmountInCart      = cart.Amount();
     ViewBag.ShoppingCartTotal = cart.Total;
     base.OnActionExecuting(filterContext);
 }
 public ActionResult CartButton()
 {
     ViewBag.AmountInCart = cart.Amount();
     return(PartialView());
 }