diff --git a/B3WeChat.Web/Pages/WeChatReceive.cs b/B3WeChat.Web/Pages/WeChatReceive.cs
index 288b93c..f732d5e 100644
--- a/B3WeChat.Web/Pages/WeChatReceive.cs
+++ b/B3WeChat.Web/Pages/WeChatReceive.cs
@@ -73,12 +73,13 @@ namespace BWP.Web.Pages
       else if (result is QRCodeMessage)
       {        
         QRCodeMessage msg = result as QRCodeMessage;
-        if (string.IsNullOrEmpty(msg.EventKey))
+        int scene_id;
+        if (!int.TryParse(msg.EventKey, out scene_id))
         {
           return;
         }
         var query = new DmoQuery(typeof(QRCode));
-        query.Where.Conditions.Add(DQCondition.EQ("ID", msg.EventKey));
+        query.Where.Conditions.Add(DQCondition.EQ("ID", scene_id));
         query.Range = SelectRange.Top(1);
         var scene = query.EExecuteScalar<QRCode>();