处理微信关注操作有时出现的问题

B3WeChat/BL/ICustomerUserBL.cs

@@ -54,9 +54,18 @@ new Tuple<string, object>("CustomerUsername", customerUsername));
           update.Where.Conditions.Add(DQCondition.EQ("Username", user.CustomerUsername));
           update.Columns.Add(new DQUpdateColumn("OpenID", openID));
           Session.ExecuteNonQuery(update);
-
-          SendMessageUtil.SendOverwriteNotice(oldOpenID, customerUsername);
           SendMessageUtil.SendBindMessage(openID, customerUsername);
+          
+          //老的绑定微信号可能已经取消关注，导致下面的发消息失败
+          //目前接收微信的取消关注消息并做处理，但旧的数据可能还有此问题，增加加上try
+          try
+          {
+            SendMessageUtil.SendOverwriteNotice(oldOpenID, customerUsername);
+          }
+          catch
+          {
+
+          }
         }
         else
         {