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  • C# 微信公众平台开发(3)-- 接受/发送消息

    1.接收事件

      关注/取消关注事件;

      用户在关注与取消关注公众号时,微信会把这个事件推送到开发者填写的URL。

    通过微信返回的XML,我们通过代码 就可以作相应的处理;

    先获取返回的信息:

     1     if (HttpContext.Current.Request.HttpMethod.ToUpper() == "POST")
     2             {
     3                 using (Stream stream = HttpContext.Current.Request.InputStream)
     4                 {
     5                     Byte[] postBytes = new Byte[stream.Length];
     6                     stream.Read(postBytes, 0, (Int32)stream.Length);
     7                     postString = Encoding.UTF8.GetString(postBytes);
     8                     EventHandle(postString);
     9                 }
    10 
    11                 if (!string.IsNullOrEmpty(postString))
    12                 {
    13                     responseMsg(postString, context);//关注微信,返回消息
    14                 }
    15             }
    postString  里面 就是XML;我们只需要对 XML作相应的处理就好
       System.Xml.XmlDocument postObj = new      System.Xml.XmlDocument();
                    postObj.LoadXml(postStr);
    
           var eventList = postObj.GetElementsByTagName("Event");
        var textpl = "";
       string FromUserName = string.Empty;
    
                    for (int i = 0; i < FromUserNameList.Count; i++)
                    {
                        if (FromUserNameList[i].ChildNodes[0].NodeType == System.Xml.XmlNodeType.CDATA)
                        {
                            FromUserName = FromUserNameList[i].ChildNodes[0].Value;
                        }
                    }
       var toUsernameList = postObj.GetElementsByTagName("ToUserName");
                    string ToUserName = string.Empty;
                    for (int i = 0; i < toUsernameList.Count; i++)
                    {
                        if (toUsernameList[i].ChildNodes[0].NodeType == System.Xml.XmlNodeType.CDATA)
                        {
                            ToUserName = toUsernameList[i].ChildNodes[0].Value;
                        }
                    }
        if (toEvent == "subscribe")
                        {
                            string rebakcHtml = @"Hi,欢迎来到我爱足球社区";
                  //ReceivedText 返回文本消息的格式 textpl
    = type.ReceivedText(FromUserName, ToUserName, rebakcHtml); }

     1   /// <summary>
     2         /// 回复文本
     3         /// </summary>
     4         /// <param name="FromUserName"></param>
     5         /// <param name="ToUserName"></param>
     6         /// <param name="Content"></param>
     7         /// <returns></returns>
     8         public string ReceivedText(string FromUserName, string ToUserName, string Content)
     9         {
    10 
    11             string textpl = string.Empty;
    12             textpl = "<xml>" +
    13                      "<ToUserName><![CDATA[" + FromUserName + "]]></ToUserName>" +
    14                      "<FromUserName><![CDATA[" + ToUserName + "]]></FromUserName>" +
    15                      "<CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime>" +
    16                      "<MsgType><![CDATA[text]]></MsgType>" +
    17                      "<Content><![CDATA[" + Content + "]]></Content>" +
    18                      "<FuncFlag>0</FuncFlag>" +
    19                      "</xml>";
    20 
    21             return textpl;
    22         }
    文本消息

     System.Web.HttpContext.Current.Response.Write(textpl); 我们将文本信息 返回给微信;

    2.点击按钮

     1 #region 微信菜单点击事件
     2 
     3         /// <summary>
     4         /// 微信菜单点击事件
     5         /// </summary>
     6         /// <param name="postStr">接受消息</param>
     7         /// <returns></returns>
     8         private void EventHandle(string postStr)
     9         {
    10             string responseContent = "";
    11             try
    12             {
    13                 System.Xml.XmlDocument xmldoc = new System.Xml.XmlDocument();
    14                 xmldoc.LoadXml(postStr);
    15 
    16                 XmlNode Event = xmldoc.SelectSingleNode("/xml/Event");
    17                 XmlNode EventKey = xmldoc.SelectSingleNode("/xml/EventKey");
    18                 XmlNode ToUserName = xmldoc.SelectSingleNode("/xml/ToUserName");
    19                 XmlNode FromUserName = xmldoc.SelectSingleNode("/xml/FromUserName");
    20 
    21                 if (Event != null)
    22                 {
    23                     if (EventKey.InnerText.Equals("V1001_ORDER"))//EventKey.InnerText.Equals("V1001_ORDER") 就是创建菜单时,click按钮的唯一Key
    24                     {
    25                         responseContent = string.Format(Message_Text,
    26                              FromUserName.InnerText,
    27                              ToUserName.InnerText,
    28                              DateTime.Now.Ticks,
    29                              "您好,小萌为您服务,请回复十四位订单号,查询订单详情。");//生成文本消息
    30                     }
    31                         responseContent = type.ReceivedText(FromUserName.InnerText, ToUserName.InnerText, rebakcHtml);
    32                     }
    33                 }
    34 
    35                 LogTextHelper.WriteLogToFile(responseContent + "------------------" + postStr);
    36                 HttpContext.Current.Response.Write(responseContent);//返回给微信
    37             }
    38             catch (Exception ex)
    39             {
    40                 LogTextHelper.WriteLogToFile("微信菜单点击事件" + "||" + ex.ToString());
    41             }
    42         }
    43 
    44         /// <summary>
    45         /// 普通文本消息
    46         /// </summary>
    47         public static string Message_Text
    48         {
    49             get
    50             {
    51                 return @"<xml>                             
    52                              <ToUserName><![CDATA[{0}]]></ToUserName>                             
    53                              <FromUserName><![CDATA[{1}]]></FromUserName>
    54                              <CreateTime>{2}</CreateTime>
    55                              <MsgType><![CDATA[text]]></MsgType>
    56                              <Content><![CDATA[{3}]]></Content>
    57                              </xml>";
    58             }
    59         }
    60 
    61         #endregion

    3.接受消息:

     接受消息 跟关注微信号有点类似:

    消息内容 

    var keywordList = postObj.GetElementsByTagName("Content"); 

    string Content = string.Empty;
      for (int i = 0; i < keywordList.Count; i++)
      {
        if (keywordList[i].ChildNodes[0].NodeType == System.Xml.XmlNodeType.CDATA)
          {
            Content = keywordList[i].ChildNodes[0].Value;
          }
      }

    1 if (toMsgType == "text")//接口文本消息 toMsgType是消息类型
    2     {
          //ToDo 根据业务 处理消息内容
    3 4 else if (toMsgType == "event")//关注 5 { 6 if (toEvent == "subscribe") 7 { 8 9

    请点击我 --我爱足球

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  • 原文地址:https://www.cnblogs.com/amoshu/p/4980098.html
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