二维码过期时给出友好的提示

B3WeChat.Web/Pages/WeChatReceive.cs

@@ -78,6 +78,13 @@ namespace BWP.Web.Pages
         query.Range = SelectRange.Top(1);
         var scene = query.EExecuteScalar<QRCode>();
 
+        if (scene == null)
+        {
+          var openID = msg.FromUserName;
+          SendMessageUtil.SendQRCodeNotFoundMessage(openID);
+          return;
+        }
+
         try
         {
           CustomerUserBL.Instance.Follow(scene.Customer, scene.UserId, msg.FromUserName);

B3WeChat/Utils/SendMessageUtil.cs

@@ -93,6 +93,18 @@ namespace BWP.B3WeChat.Utils
     }
 
 
+    public static void SendQRCodeNotFoundMessage(string openID)
+    {
+      var dict = new Dictionary<string, ValueColor>();
+      var first = string.Format("你所访问的二维码已失效");
+      dict.Add("first", new ValueColor(first));
+      dict.Add("keyword1", new ValueColor(FormatTime(DateTime.Now)));
+      dict.Add("keyword2", new ValueColor("请重新登录系统并扫描二维码"));
+      InOutMessageUtil.SendTemplateMessage(openID, "QEgY8xa4BuAAcyTex1qXuN9KeKM93O9XHCz2Ti-oCpc", dict);
+    }
+
+
+
 
 //模板ID:Qp53p4jHyk9vxXiLs0VRUN_5HHwmjeWPT-7XLwG2FkU
 //标题:绑定通知