若收款码或音响码已是绑定状态，返回对应提示

Areas/Api/Controllers/v1/MainServer/MerchantQrCodeController.cs

@@ -114,6 +114,14 @@ namespace MySystem.Areas.Api.Controllers.v1
             PosMachinesTwo pos = new PosMachinesTwoService().Query(SnNo);
             PosMachines machines = new PosMachinesService().Query(SnNo);
             MerchantInfo merchant = new MerchantInfoService().Query(MerchantId);
+            if (pos.BindingState == 1)
+            {
+                return new AppResultJson() { Status = "-1", Info = "此码已被绑定" };
+            }
+            if (machines.BindingState == 1)
+            {
+                return new AppResultJson() { Status = "-1", Info = "此码已被绑定" };
+            }
             int PosId = 0;
             if (SnNo == MachineNo || string.IsNullOrEmpty(MachineNo))
             {