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C#.net 微信公众账号接口开发

时间：2021-07-01 10:21:17 帮助过：12人阅读

微信越来越火，微信公众平台成为开发成新宠，本文用C#.net开发微信公众信号接口。

微信接口地址代码:

  1. weixin _wx = new weixin();
  2.         string postStr = "";
  3.         if (Request.HttpMethod.ToLower() == "post")
  4.         {
  5.           Stream s = System.Web.HttpContext.Current.Request.InputStream;
  6.           byte[] b = new byte[s.Length];
  7.           s.Read(b, 0, (int)s.Length);
  8.           postStr = Encoding.UTF8.GetString(b);
  9.           if (!string.IsNullOrEmpty(postStr)) //请求处理
  10.           {
  11.             _wx.Handle(postStr); 
  12.           }
  13.         }
  14.         else
  15.         {
  16.           _wx.Auth();
  17.         }
  18. 微信处理类：
  19. public class weixin
  20.   {
  21.     private string Token = "weixin_token"; //换成自己的token
  22.      
  23.     public void Auth()
  24.     {
  25.       string echoStr = System.Web.HttpContext.Current.Request.QueryString["echoStr"];
  26.       if (CheckSignature())
  27.       {
  28.         if (!string.IsNullOrEmpty(echoStr))
  29.         {
  30.           System.Web.HttpContext.Current.Response.Write(echoStr);
  31.           System.Web.HttpContext.Current.Response.End();
  32.         }
  33.       }
  34.     }
  35.     public void Handle(string postStr)
  36.     {
  37.       //封装请求类
  38.       XmlDocument doc = new XmlDocument();
  39.       doc.LoadXml(postStr);
  40.       XmlElement rootElement = doc.DocumentElement;
  41.       XmlNode MsgType = rootElement.SelectSingleNode("MsgType");
  42.       RequestXML requestXML = new RequestXML();
  43.       requestXML.ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText;
  44.       requestXML.FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText;
  45.       requestXML.CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText;
  46.       requestXML.MsgType = MsgType.InnerText;
  47.       if (requestXML.MsgType == "text")
  48.       {
  49.         requestXML.Content = rootElement.SelectSingleNode("Content").InnerText;
  50.       }
  51.       else if (requestXML.MsgType == "location")
  52.       {
  53.         requestXML.Location_X = rootElement.SelectSingleNode("Location_X").InnerText;
  54.         requestXML.Location_Y = rootElement.SelectSingleNode("Location_Y").InnerText;
  55.         requestXML.Scale = rootElement.SelectSingleNode("Scale").InnerText;
  56.         requestXML.Label = rootElement.SelectSingleNode("Label").InnerText;
  57.       }
  58.       else if (requestXML.MsgType == "image")
  59.       {
  60.         requestXML.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText;
  61.       }
  62.       //回复消息
  63.       ResponseMsg(requestXML);
  64.     }
  65.     /// <summary>
  66.     /// 验证微信签名
  67.     /// </summary>
  68.     /// * 将token、timestamp、nonce三个参数进行字典序排序
  69.     /// * 将三个参数字符串拼接成一个字符串进行sha1加密
  70.     /// * 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信。
  71.     /// <returns></returns>
  72.     private bool CheckSignature()
  73.     {
  74.       string signature = System.Web.HttpContext.Current.Request.QueryString["signature"];
  75.       string timestamp = System.Web.HttpContext.Current.Request.QueryString["timestamp"];
  76.       string nonce = System.Web.HttpContext.Current.Request.QueryString["nonce"];
  77.       string[] ArrTmp = { Token, timestamp, nonce };
  78.       Array.Sort(ArrTmp);   //字典排序
  79.       string tmpStr = string.Join("", ArrTmp);
  80.       tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
  81.       tmpStr = tmpStr.ToLower();
  82.       if (tmpStr == signature)
  83.       {
  84.         return true;
  85.       }
  86.       else
  87.       {
  88.         return false;
  89.       }
  90.     }
  91.     
  92.     /// <summary>
  93.     /// 回复消息(微信信息返回)
  94.     /// </summary>
  95.     /// <param name="weixinXML"></param>
  96.     private void ResponseMsg(RequestXML requestXML)
  97.     {
  98.       try
  99.       {
  100.         string resxml = "";
  101.         mijiya mi = new mijiya(requestXML.Content,requestXML.FromUserName);
  102.         if (requestXML.MsgType == "text")
  103.         {
  104.           //在这里执行一系列操作，从而实现自动回复内容. 
  105.           string _reMsg = mi.GetReMsg();
  106.           if (mi.msgType == 1)
  107.           {
  108.             resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content><ArticleCount>2</ArticleCount><Articles>";
  109.             resxml += mi.GetRePic(requestXML.FromUserName);
  110.             resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";
  111.           }
  112.           else
  113.           {
  114.             resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[" + _reMsg + "]]></Content><FuncFlag>1</FuncFlag></xml>";
  115.           }
  116.         }
  117.         else if (requestXML.MsgType == "location")
  118.         {
  119.           string city = GetMapInfo(requestXML.Location_X, requestXML.Location_Y);
  120.           if (city == "0")
  121.           {
  122.             resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[好啦，我们知道您的位置啦。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";
  123.           }
  124.           else
  125.           {
  126.             resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[好啦，我们知道您的位置啦。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";
  127.           }
  128.         }
  129.         else if (requestXML.MsgType == "image")
  130.         {
  131.           resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[亲,我没有看懂你的意思。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";
  132.           //返回10以内条
  133.           //int size = 10;
  134.           //resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content><ArticleCount>" + size + "</ArticleCount><Articles>";
  135.           //List<string> list = new List<string>();
  136.           ////假如有20条查询的返回结果
  137.           //for (int i = 0; i < 20; i++)
  138.           //{
  139.           //  list.Add("1");
  140.           //}
  141.           //string[] piclist = new string[] { "/Abstract_Pencil_Scribble_Background_Vector_main.jpg", "/balloon_tree.jpg", "/bloom.jpg", "/colorful_flowers.jpg", "/colorful_summer_flower.jpg", "/fall.jpg", "/fall_tree.jpg", "/growing_flowers.jpg", "/shoes_illustration.jpg", "/splashed_tree.jpg" };
  142.           //for (int i = 0; i < size && i < list.Count; i++)
  143.           //{
  144.           //  resxml += "<item><Title><![CDATA[沈阳-黑龙江]]></Title><Description><![CDATA[元旦特价：￥300 市场价：￥400]]></Description><PicUrl><![CDATA[" + "http://www.hougelou.com" + piclist[i] + "]]></PicUrl><Url><![CDATA[http://www.hougelou.com]]></Url></item>";
  145.           //}
  146.           //resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";
  147.         }
  148.         else if (wx_tmsg.GetMsgCount(requestXML.FromUserName) == 0)
  149.         {
  150.           resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[" + mi.GetFirst() + "]]></Content><FuncFlag>1</FuncFlag></xml>";
  151.           
  152.         }
  153.         else
  154.         {
  155.           resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[亲,我没有看懂你的意思。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";
  156.           
  157.         }
  158.         //WriteTxt(resxml);
  159.         System.Web.HttpContext.Current.Response.Write(resxml);
  160.         WriteToDB(requestXML, resxml,mi.pid);
  161.       }
  162.       catch (Exception ex)
  163.       {
  164.         //WriteTxt("异常：" + ex.Message + "Struck:" + ex.StackTrace.ToString());
  165.         wx_logs.MyInsert("异常：" + ex.Message + "Struck:" + ex.StackTrace.ToString());
  166.       }
  167.     }
  168.      
  169.     /// <summary>
  170.     /// unix时间转换为datetime
  171.     /// </summary>
  172.     /// <param name="timeStamp"></param>
  173.     /// <returns></returns>
  174.     private DateTime UnixTimeToTime(string timeStamp)
  175.     {
  176.       DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
  177.       long lTime = long.Parse(timeStamp + "0000000");
  178.       TimeSpan toNow = new TimeSpan(lTime);
  179.       return dtStart.Add(toNow);
  180.     }
  181.     /// <summary>
  182.     /// datetime转换为unixtime
  183.     /// </summary>
  184.     /// <param name="time"></param>
  185.     /// <returns></returns>
  186.     private int ConvertDateTimeInt(System.DateTime time)
  187.     {
  188.       System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
  189.       return (int)(time - startTime).TotalSeconds;
  190.     }
  191.     /// <summary>
  192.     /// 调用百度地图，返回坐标信息
  193.     /// </summary>
  194.     /// <param name="y">经度</param>
  195.     /// <param name="x">纬度</param>
  196.     /// <returns></returns>
  197.     public string GetMapInfo(string x, string y)
  198.     {
  199.       try
  200.       {
  201.         string res = string.Empty;
  202.         string parame = string.Empty;
  203.         string url = "http://maps.googleapis.com/maps/api/geocode/xml";
  204.         parame = "latlng=" + x + "," + y + "&language=zh-CN&sensor=false";//此key为个人申请
  205.         res = webRequestPost(url, parame);
  206.         XmlDocument doc = new XmlDocument();
  207.         doc.LoadXml(res);
  208.         XmlElement rootElement = doc.DocumentElement;
  209.         string Status = rootElement.SelectSingleNode("status").InnerText;
  210.         if (Status == "OK")
  211.         {
  212.           //仅获取城市
  213.           XmlNodeList xmlResults = rootElement.SelectSingleNode("/GeocodeResponse").ChildNodes;
  214.           for (int i = 0; i < xmlResults.Count; i++)
  215.           {
  216.             XmlNode childNode = xmlResults[i];
  217.             if (childNode.Name == "status")
  218.             {
  219.               continue;
  220.             }
  221.             string city = "0";
  222.             for (int w = 0; w < childNode.ChildNodes.Count; w++)
  223.             {
  224.               for (int q = 0; q < childNode.ChildNodes[w].ChildNodes.Count; q++)
  225.               {
  226.                 XmlNode childeTwo = childNode.ChildNodes[w].ChildNodes[q];
  227.                 if (childeTwo.Name == "long_name")
  228.                 {
  229.                   city = childeTwo.InnerText;
  230.                 }
  231.                 else if (childeTwo.InnerText == "locality")
  232.                 {
  233.                   return city;
  234.                 }
  235.               }
  236.             }
  237.             return city;
  238.           }
  239.         }
  240.       }
  241.       catch (Exception ex)
  242.       {
  243.         //WriteTxt("map异常:" + ex.Message.ToString() + "Struck:" + ex.StackTrace.ToString());
  244.         return "0";
  245.       }
  246.       return "0";
  247.     }
  248.     /// <summary>
  249.     /// Post 提交调用抓取
  250.     /// </summary>
  251.     /// <param name="url">提交地址</param>
  252.     /// <param name="param">参数</param>
  253.     /// <returns>string</returns>
  254.     public string webRequestPost(string url, string param)
  255.     {
  256.       byte[] bs = System.Text.Encoding.UTF8.GetBytes(param);
  257.       HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url + "?" + param);
  258.       req.Method = "Post";
  259.       req.Timeout = 120 * 1000;
  260.       req.ContentType = "application/x-www-form-urlencoded;";
  261.       req.ContentLength = bs.Length;
  262.       using (Stream reqStream = req.GetRequestStream())
  263.       {
  264.         reqStream.Write(bs, 0, bs.Length);
  265.         reqStream.Flush();
  266.       }
  267.       using (WebResponse wr = req.GetResponse())
  268.       {
  269.         //在这里对接收到的页面内容进行处理 
  270.         Stream strm = wr.GetResponseStream();
  271.         StreamReader sr = new StreamReader(strm, System.Text.Encoding.UTF8);
  272.         string line;
  273.         System.Text.StringBuilder sb = new System.Text.StringBuilder();
  274.         while ((line = sr.ReadLine()) != null)
  275.         {
  276.           sb.Append(line + System.Environment.NewLine);
  277.         }
  278.         sr.Close();
  279.         strm.Close();
  280.         return sb.ToString();
  281.       }
  282.     }
  283.     private void WriteToDB(RequestXML requestXML,string _xml,int _pid)
  284.     {
  285.       wx_tmsg wx = new wx_tmsg();
  286.       wx.AddNew();
  287.       wx.FromUserName = requestXML.FromUserName;
  288.       wx.ToUserName = requestXML.ToUserName;
  289.       wx.MsgType = requestXML.MsgType;
  290.       wx.Msg = requestXML.Content;
  291.       wx.Creatime = requestXML.CreateTime;
  292.       wx.Location_X = requestXML.Location_X;
  293.       wx.Location_Y = requestXML.Location_Y;
  294.       wx.Label = requestXML.Label;
  295.       wx.Scale = requestXML.Scale;
  296.       wx.PicUrl = requestXML.PicUrl;
  297.       wx.reply = _xml;
  298.       wx.pid = _pid;
  299.       try
  300.       {
  301.         wx.Update();
  302.       }
  303.       catch (Exception ex)
  304.       {
  305.         wx_logs.MyInsert(ex.Message);
  306.         //ex.message;
  307.       }
  308.     }
  309.   }
  310.   //微信请求类
  311.   public class RequestXML
  312.   {
  313.     private string toUserName="";
  314.     /// <summary>
  315.     /// 消息接收方微信号，一般为公众平台账号微信号
  316.     /// </summary>
  317.     public string ToUserName
  318.     {
  319.       get { return toUserName; }
  320.       set { toUserName = value; }
  321.     }
  322.     private string fromUserName = "";
  323.     /// <summary>
  324.     /// 消息发送方微信号
  325.     /// </summary>
  326.     public string FromUserName
  327.     {
  328.       get { return fromUserName; }
  329.       set { fromUserName = value; }
  330.     }
  331.     private string createTime = "";
  332.     /// <summary>
  333.     /// 创建时间
  334.     /// </summary>
  335.     public string CreateTime
  336.     {
  337.       get { return createTime; }
  338.       set { createTime = value; }
  339.     }
  340.     private string msgType = "";
  341.     /// <summary>
  342.     /// 信息类型 地理位置:location,文本消息:text,消息类型:image
  343.     /// </summary>
  344.     public string MsgType
  345.     {
  346.       get { return msgType; }
  347.       set { msgType = value; }
  348.     }
  349.     private string content = "";
  350.     /// <summary>
  351.     /// 信息内容
  352.     /// </summary>
  353.     public string Content
  354.     {
  355.       get { return content; }
  356.       set { content = value; }
  357.     }
  358.     private string location_X = "";
  359.     /// <summary>
  360.     /// 地理位置纬度
  361.     /// </summary>
  362.     public string Location_X
  363.     {
  364.       get { return location_X; }
  365.       set { location_X = value; }
  366.     }
  367.     private string location_Y = "";
  368.     /// <summary>
  369.     /// 地理位置经度
  370.     /// </summary>
  371.     public string Location_Y
  372.     {
  373.       get { return location_Y; }
  374.       set { location_Y = value; }
  375.     }
  376.     private string scale = "";
  377.     /// <summary>
  378.     /// 地图缩放大小
  379.     /// </summary>
  380.     public string Scale
  381.     {
  382.       get { return scale; }
  383.       set { scale = value; }
  384.     }
  385.     private string label = "";
  386.     /// <summary>
  387.     /// 地理位置信息
  388.     /// </summary>
  389.     public string Label
  390.     {
  391.       get { return label; }
  392.       set { label = value; }
  393.     }
  394.     private string picUrl = "";
  395.     /// <summary>
  396.     /// 图片链接，开发者可以用HTTP GET获取
  397.     /// </summary>
  398.     public string PicUrl
  399.     {
  400.       get { return picUrl; }
  401.       set { picUrl = value; }
  402.     }
  403. }

说明： 其中用到的mijiya类，主要是调用数据库进行关键词匹配自动回复内容，可以根据自己的业务情况编写。

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