class wxmessage 
  { 
    public string FromUserName { get; set; } 
    public string ToUserName { get; set; } 
    public string MsgType { get; set; } 
    public string EventName { get; set; } 
    public string Content { get; set; }
    public string Recognition { get; set; }
    public string EventKey { get; set; } 
  } 

protected void Page_Load(object sender, EventArgs e)
   {
     wxmessage wx = GetWxMessage();
     string res = "";

     if (!string.IsNullOrEmpty(wx.EventName)  wx.EventName.Trim() == "subscribe")
     {//剛關注時的時間，用于歡迎詞
       string content = "";
       content = "/:rose歡迎北京永杰友信科技有限公司/:rose\n直接回復“你好”";
       res = sendTextMessage(wx, content);
     }
     else
     {
       if (wx.MsgType == "text"  wx.Content == "你好")
       {
         res = sendTextMessage(wx, "你好,歡迎使用北京永杰友信科技有限公司公共微信平臺!");
       }
       else if (wx.MsgType == "voice")//識別消息類型為語音
       {
         res = sendTextMessage(wx, wx.Recognition);//wx.Recognition就是語音識別的結果了，我們直接引用，以文本形式反饋就OK了

       }
       else
       {
         res = sendTextMessage(wx, "你好,未能識別消息!");
       }
     }

     Response.Write(res);
   }

 private wxmessage GetWxMessage()
   {
     wxmessage wx = new wxmessage();
     StreamReader str = new StreamReader(Request.InputStream, System.Text.Encoding.UTF8);
     XmlDocument xml = new XmlDocument();
     xml.Load(str);
     wx.ToUserName = xml.SelectSingleNode("xml").SelectSingleNode("ToUserName").InnerText;
     wx.FromUserName = xml.SelectSingleNode("xml").SelectSingleNode("FromUserName").InnerText;
     wx.MsgType = xml.SelectSingleNode("xml").SelectSingleNode("MsgType").InnerText;
     if (wx.MsgType.Trim() == "text")
     {
       wx.Content = xml.SelectSingleNode("xml").SelectSingleNode("Content").InnerText;
     }
     if (wx.MsgType.Trim() == "event")
     {
       wx.EventName = xml.SelectSingleNode("xml").SelectSingleNode("Event").InnerText;
     }
     if (wx.MsgType.Trim() == "voice")//如果是語音消息的話就把識別結果賦值給實體類的相應屬性Recognition 
     {
       wx.Recognition = xml.SelectSingleNode("xml").SelectSingleNode("Recognition").InnerText;
     }
     
     return wx;
   }


   ///  
   /// 發送文字消息 
   ///  
   /// 獲取的收發者信息 
   /// 內容 
   ///  
   private string sendTextMessage(wxmessage wx, string content)
   {
     string res = string.Format(@" ",
       wx.FromUserName, wx.ToUserName, DateTime.Now, content);
     return res;
   }