没商户号不请求换绑接口

AppStart/Helper/ChangePosFeeUtil.cs

@@ -300,8 +300,11 @@ namespace MySystem
                 if(DepositId == "0")
                 {
                     PosMerchantInfo merchant = db.PosMerchantInfo.FirstOrDefault(m => m.Id == pos.BindMerchantId) ?? new PosMerchantInfo();
-                    string back = PublicImportDataService.Instance.SftSnBindOrUnbind(pos.PosSn, merchant.KqMerNo);
-                    function.WriteLog("back:" + back, "盛付通-设置押金-返回报文");
+                    if(!string.IsNullOrEmpty(merchant.KqMerNo))
+                    {
+                        string back = PublicImportDataService.Instance.SftSnBindOrUnbind(pos.PosSn, merchant.KqMerNo);
+                        function.WriteLog("back:" + back, "盛付通-设置押金-返回报文");
+                    }
                 }
                 string content = PublicImportDataService.Instance.SetDepositForSft(pos.PosSn, "2024POS" + DepositIdString);
                 function.WriteLog(DateTime.Now.ToString() + "\n" + content, "盛付通-设置押金-返回报文");