修复商城下单购买组合包推荐奖励异常

AppStart/Helper/PosCouponPrize/PosCouponPrizeService.cs

@@ -89,7 +89,7 @@ namespace MySystem
                     {
                         PreUserLevel(db, order.UserId, 1, DateTime.Parse("2025-01-01 00:00:00"));
                     }
-                    List<string> codes = order.SnNos.Split(',').ToList();
+                    List<string> codes = function.CheckNull(order.SnNos).Split(',').ToList();
                     string ParentNav = orderUser.ParentNav + "," + orderUser.Id + ",";
                     string[] ParentNavList = ParentNav.Trim(',').Replace(",,", ",").Split(',');
                     Array.Reverse(ParentNavList);