我为自己的笑话网开发了一个微信公众平台的接口，在这里分享给大家，希望能对朋友们有帮助，如果有什么地方写的不好，好请大家指点！

首先是要进行认证，认证的时候，只需要在Page_Load事件里面单独去执行 认证的方法就可以了，具体代码见下面的RenZheng()

认证通过之后就可以对网友的消息进行处理，可以根据微信平台推送过来的数据进行分析！我相信大家在看到这篇文章的时候，在此之前肯定对平台都有所了解了，所以，废话不多说，直接上代码！ 如果有什么疑问的欢迎加群：242384606 进行讨论！

    protected void Page_Load(object sender, EventArgs e)        {            wxmessage wx = GetWxMessage();            string res = "";            //新用户添加            if (!string.IsNullOrEmpty(wx.EventName) && wx.EventName.Trim() == "subscribe")            {                string content = "";                content = "/:rose欢迎关注52冷笑话/:rose\n看笑话请直接回复“x”\n无聊时候还可以找我聊聊天哦！";                res = sendTextMessage(wx, content);            }            else            {                bool sendJoke = false;                //看笑话                List<string> xhList = new List<string>() { "x", "笑话", "笑話" };                foreach (string item in xhList)                {                    if (wx.Content.Trim().ToLower().Contains(item))                    {                        sendJoke = true;                        break;                    }                }                if (sendJoke)                {                    JokeDemo joke = GetJoke(wx.FromUserName);                    if (string.IsNullOrEmpty(joke.Img))                    {                        string title = string.Format("编号{0}:{1}\n-----------------\n", joke.ID, joke.Title);                        string content = joke.Content;                        if (content.Length > 300)                        {                            content = GetSubString(content, 300) + "\n-----------------\n点击连接阅读全文：URL"                        }                        res = sendTextMessage(wx, title + content);                    }                    else                    {                        res = sendPictureMessage(wx, joke);                    }                }                //智能学聊天                if (res == "" && Regex.IsMatch(wx.Content, "问(:|：)(.+?)答(:|：)(.+?)", RegexOptions.IgnoreCase))                {                    string content = "";                    string key = Regex.Match(wx.Content, "问(:|：)(.+?)答(:|：)(.+?)", RegexOptions.IgnoreCase).Groups[2].Value.Trim();                    int startIndex = wx.Content.IndexOf("答:") + 2;                    if (startIndex < 3)                    {                        startIndex = wx.Content.IndexOf("答：") + 2;                    }                    string rep = wx.Content.Substring(startIndex, wx.Content.Length - startIndex).Trim();            // Regex.Match(wx.Content, "问(:|：)(.+?)答(:|：)(.+?)", RegexOptions.IgnoreCase).Groups[4].Value;                    if ((new ChatBLL()).isExists(key))                    {                        content = "/::)O啦！学会啦\n不信你问问！";                    }                    else                    {                        if ((new ChatBLL()).Add(key, rep) > 0)                        {                            content = "好啦，这个问题我学会啦！\n你现在提问我吧！/::P";                        }                        else                        {                            content = "糟糕了，系统出了点儿小意外！\n麻烦你再试一次！";                        }                    }                    res = sendTextMessage(wx, content);                }                //未知情况                if (res == "")                {                    string content = (new ChatBLL()).GetReplyByKey(wx.Content.Trim());                    if (content == "")                    {                        content = "/:,@-D啊哦，你在说什么？\n你可以按照下面的格式告诉我：\n问：你说的话 答：你想让我说什么\n看笑话请直接回复“x”！";                    }                    res = sendTextMessage(wx, content);                }            }            Response.Write(res);        }        /// <summary>        /// 发送文字消息        /// </summary>        /// <param name="wx">获取的收发者信息</param>        /// <param name="content">笑话内容</param>        /// <returns></returns>        private string sendTextMessage(wxmessage wx, string content)        {            string res = string.Format("<xml><ToUserName><![CDATA[{0}]]></ToUserName><FromUserName><![CDATA[{1}]]></FromUserName><CreateTime>{2}</CreateTime><MsgType><![CDATA[text]]></MsgType> <Content><![CDATA[{3}]]></Content> <FuncFlag>0</FuncFlag></xml> ",                wx.FromUserName, wx.ToUserName, DateTime.Now, 内容);            return res;        }        /// <summary>        /// 发送图文消息        /// </summary>        /// <param name="wx">获取的收发者信息</param>        /// <param name="joke">笑话信息</param>        /// <returns></returns>        private string sendPictureMessage(wxmessage wx, JokeDemo joke)        {            StringBuilder sb = new StringBuilder();            sb.AppendFormat("<xml><ToUserName><![CDATA[{0}]]></ToUserName>", wx.FromUserName);            sb.AppendFormat("<FromUserName><![CDATA[{0}]]></FromUserName>", wx.ToUserName);            sb.AppendFormat("<CreateTime>{0}</CreateTime>", DateTime.Now);            sb.AppendFormat("<MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content>");            sb.AppendFormat("<ArticleCount>1</ArticleCount>");            sb.AppendFormat("<Articles><item>");            sb.AppendFormat("<Title><![CDATA[{0}]]></Title>", 标题);            sb.AppendFormat("<Description><![CDATA[{0}]]></Description>", 说明文字);            sb.AppendFormat("<PicUrl><![CDATA[{0}]]></PicUrl>", 图片地址);            sb.AppendFormat("<Url><![CDATA[{0}]]></Url>", 连接地址);            sb.AppendFormat("</item></Articles><FuncFlag>0</FuncFlag></xml>");            return sb.ToString();        }        /// <summary>        /// 获取请求过来的微信信息        /// </summary>        /// <returns></returns>        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;            }            return wx;        }        /// <summary>        /// 微信认证        /// </summary>        private void RenZheng()        {            #region 微信认证            //string res = "";            //string token = "52lxh";            //string signature = Request["signature"];            //string timestamp = Request["timestamp"];            //string nonce = Request["nonce"];            //string echostr = Request["echostr"];            //if (string.IsNullOrEmpty(token) || string.IsNullOrEmpty(signature) || string.IsNullOrEmpty(timestamp) || string.IsNullOrEmpty(nonce) || string.IsNullOrEmpty(echostr))            //{            //    using (StreamWriter sw = new StreamWriter(Server.MapPath("wx.txt")))            //    {            //        sw.Write("参数错误" + Request.Url);            //    }            //}            //else            //{            //    ArrayList arr = new ArrayList() { token, timestamp, nonce };            //    arr.Sort();            //    string signature1 = GetSHA1(arr[0].ToString() + arr[1].ToString() + arr[2].ToString());            //    if (signature == signature1.ToLower())            //    {            //        res = echostr;            //    }            //    else            //    {            //        res = "error";            //    }            //    Response.Write(res);            //}            #endregion        }        /// <summary>        /// 加密字符串        /// </summary>        /// <param name="password"></param>        /// <returns></returns>        private string GetSHA1(string password)        {            string shh1string = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(password, "SHA1");            return shh1string;        }        /// <summary>        /// 截取字符串        /// </summary>        /// <param name="content"></param>        /// <param name="length"></param>        /// <returns></returns>        private string GetSubString(string content, int length)        {            if (content.Length >= length)            {                return content.Substring(0, length);            }            else            {                return content;            }        }        //自定义一个微信消息实体类        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; }        }

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微信公众平台接口，asp.net实现