public ActionResult Index(int orderId)
        {
            var orderItems = new OrderItemLogic().GetListByOrderId(orderId);

            ViewBag.OrderId = orderId;
            return(View(orderItems));
        }
        public ActionResult Edit(int id, int orderId)
        {
            OrderItem orderItem = new OrderItemLogic().GetById(id);

            orderItem.OrderId = orderId;
            if (orderItem == null)
            {
                return(View());
            }
            ViewBag.UnitId = new SelectList(new UnitLogic().GetList(), "ID", "Name", orderItem.UnitId);
            return(View(orderItem));
        }