[HttpPost]
        public ActionResult SelectProduct(BrandViewModel vm)
        {
            Dictionary<int, object> cart;

            if (HttpContext.Session.Get<Dictionary<int, object>>("cart") == null)
            {
                cart = new Dictionary<int, object>();
            }
            else
            {
                cart = HttpContext.Session.Get<Dictionary<int, object>>("cart");
            }

            ProductViewModel[] menu = HttpContext.Session.Get<ProductViewModel[]>("menu");

            String retMsg = "";

            foreach (ProductViewModel item in menu)
            {
                if (Convert.ToInt32(item.Id) == vm.Id)
                {
                    if (vm.Qty > 0) // update only selected item
                    {
                        item.Qty = vm.Qty;
                        retMsg = vm.Qty + " - item(s) Added!";
                        cart[Convert.ToInt32(item.Id)] = item;
                    }
                    else
                    {
                        item.Qty = 0;
                        cart.Remove(Convert.ToInt32(item.Id));
                        retMsg = "item(s) Removed!";
                    }
                    vm.BrandId = item.BrandId;
                    break;
                }
            }

            ViewBag.AddMessage = retMsg;
            HttpContext.Session.Set<Dictionary<int, object>>("cart", cart);
            vm.SetBrands(HttpContext.Session.Get<List<Brand>>("brands"));
            return View("Index", vm);
        }