押金机具推送消息判断

AppStart/Helper/SycnSpServer/SycnSpActiveService.cs

@@ -40,9 +40,12 @@ namespace MySystem
                     {
                         PxcModels.MachineForMerNo posFor = db.MachineForMerNo.FirstOrDefault(m => m.MerNo == act.MerNo) ?? new PxcModels.MachineForMerNo();
                         PxcModels.PosMachinesTwo pos = db.PosMachinesTwo.FirstOrDefault(m => m.Id == posFor.SnId);
-                        if(pos.BrandId == 18 || pos.BrandId == 19 || pos.BrandId == 20 || pos.BrandId == 21)
+                        if (pos != null)
                         {
-                            pos = db.PosMachinesTwo.FirstOrDefault(m => m.PosSn == act.SnNo);
+                            if(pos.BrandId == 18 || pos.BrandId == 19 || pos.BrandId == 20 || pos.BrandId == 21)
+                            {
+                                pos = db.PosMachinesTwo.FirstOrDefault(m => m.PosSn == act.SnNo);
+                            }
                         }
                         if (pos != null)
                         {