public ActionResult Delete(int[] orderIDs = null)
        {
            if (orderIDs != null)
            {
                if (CatalogBLL.DeleteOrderDetail(orderIDs) != 0)
                {
                    CatalogBLL.DeleteOrder(orderIDs);
                }

                return(RedirectToAction("Index"));
            }
            return(RedirectToAction("Index"));
        }