审批消息使用更精确的时间，以免退回时消息重复，微信不发送

B3WeChat.Web/Pages/WeChatReceive.cs

@@ -73,6 +73,10 @@ namespace BWP.Web.Pages
       else if (result is QRCodeMessage)
       {        
         QRCodeMessage msg = result as QRCodeMessage;
+        if (string.IsNullOrEmpty(msg.EventKey))
+        {
+          return;
+        }
         var query = new DmoQuery(typeof(QRCode));
         query.Where.Conditions.Add(DQCondition.EQ("ID", msg.EventKey));
         query.Range = SelectRange.Top(1);

B3WeChat/Rpcs/ApproveMessageRpc.cs

@@ -52,9 +52,8 @@ namespace BWP.B3WeChat.Rpcs
       var mainSystemConfig = new MainSystemConfig();
       var internetAccessAddress = mainSystemConfig.InternetAccessAddress.Value;
       var originUrl = internetAccessAddress + "app/index.html?messageid=" + message.ID;
-      var timeStr = DateTime.Now.ToLongTimeString();
 
-      SendMessageUtil.SendTodoMessage(openID, context.CustomerName, message.Username, "微信工作流审批", message.CreateTime, originUrl);
+      SendMessageUtil.SendTodoMessage(openID, context.CustomerName, message.Username, "微信工作流审批", DateTime.Now, originUrl);
 
 #endif
     }