C#.net 微信公众账号接口开发

 更新时间:2016年05月04日 10:27:21   作者:陌上幽兰   我要评论
这篇文章主要介绍了C#.net 微信公众账号接口开发,需要的朋友可以参考下

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:

weixin _wx = new weixin();
        string postStr = "";
        if (Request.HttpMethod.ToLower() == "post")
        {
          Stream s = System.Web.HttpContext.Current.Request.InputStream;
          byte[] b = new byte[s.Length];
          s.Read(b, 0, (int)s.Length);
          postStr = Encoding.UTF8.GetString(b);

          if (!string.IsNullOrEmpty(postStr)) //请求处理
          {
            _wx.Handle(postStr); 
          }
        }
        else
        {
          _wx.Auth();
        }

微信处理类:
public class weixin
  {
    private string Token = "weixin_token"; //换成自己的token
     
    public void Auth()
    {
      string echoStr = System.Web.HttpContext.Current.Request.QueryString["echoStr"];
      if (CheckSignature())
      {
        if (!string.IsNullOrEmpty(echoStr))
        {
          System.Web.HttpContext.Current.Response.Write(echoStr);
          System.Web.HttpContext.Current.Response.End();
        }
      }
    }

    public void Handle(string postStr)
    {
      //封装请求类
      XmlDocument doc = new XmlDocument();
      doc.LoadXml(postStr);
      XmlElement rootElement = doc.DocumentElement;

      XmlNode MsgType = rootElement.SelectSingleNode("MsgType");

      RequestXML requestXML = new RequestXML();
      requestXML.ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText;
      requestXML.FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText;
      requestXML.CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText;
      requestXML.MsgType = MsgType.InnerText;

      if (requestXML.MsgType == "text")
      {
        requestXML.Content = rootElement.SelectSingleNode("Content").InnerText;
      }
      else if (requestXML.MsgType == "location")
      {
        requestXML.Location_X = rootElement.SelectSingleNode("Location_X").InnerText;
        requestXML.Location_Y = rootElement.SelectSingleNode("Location_Y").InnerText;
        requestXML.Scale = rootElement.SelectSingleNode("Scale").InnerText;
        requestXML.Label = rootElement.SelectSingleNode("Label").InnerText;
      }
      else if (requestXML.MsgType == "image")
      {
        requestXML.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText;
      }

      //回复消息
      ResponseMsg(requestXML);
    }

    /// <summary>
    /// 验证微信签名
    /// </summary>
    /// * 将token、timestamp、nonce三个参数进行字典序排序
    /// * 将三个参数字符串拼接成一个字符串进行sha1加密
    /// * 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。
    /// <returns></returns>
    private bool CheckSignature()
    {
      string signature = System.Web.HttpContext.Current.Request.QueryString["signature"];
      string timestamp = System.Web.HttpContext.Current.Request.QueryString["timestamp"];
      string nonce = System.Web.HttpContext.Current.Request.QueryString["nonce"];
      string[] ArrTmp = { Token, timestamp, nonce };
      Array.Sort(ArrTmp);   //字典排序
      string tmpStr = string.Join("", ArrTmp);
      tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
      tmpStr = tmpStr.ToLower();
      if (tmpStr == signature)
      {
        return true;
      }
      else
      {
        return false;
      }
    }
    
    /// <summary>
    /// 回复消息(微信信息返回)
    /// </summary>
    /// <param name="weixinXML"></param>
    private void ResponseMsg(RequestXML requestXML)
    {
      try
      {
        string resxml = "";
        mijiya mi = new mijiya(requestXML.Content,requestXML.FromUserName);

        if (requestXML.MsgType == "text")
        {
          //在这里执行一系列操作,从而实现自动回复内容. 
          string _reMsg = mi.GetReMsg();
          if (mi.msgType == 1)
          {
            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>";
            resxml += mi.GetRePic(requestXML.FromUserName);
            resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";
          }
          else
          {
            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>";
          }
        }
        else if (requestXML.MsgType == "location")
        {
          string city = GetMapInfo(requestXML.Location_X, requestXML.Location_Y);
          if (city == "0")
          {
            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>";
          }
          else
          {
            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>";
          }
        }
        else if (requestXML.MsgType == "image")
        {
          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>";
          //返回10以内条
          //int size = 10;
          //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>";
          //List<string> list = new List<string>();
          ////假如有20条查询的返回结果
          //for (int i = 0; i < 20; i++)
          //{
          //  list.Add("1");
          //}
          //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" };

          //for (int i = 0; i < size && i < list.Count; i++)
          //{
          //  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>";
          //}
          //resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";
        }
        else if (wx_tmsg.GetMsgCount(requestXML.FromUserName) == 0)
        {
          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>";
          
        }
        else
        {
          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>";
          
        }
        //WriteTxt(resxml);
        System.Web.HttpContext.Current.Response.Write(resxml);

        WriteToDB(requestXML, resxml,mi.pid);
      }
      catch (Exception ex)
      {
        //WriteTxt("异常:" + ex.Message + "Struck:" + ex.StackTrace.ToString());
        wx_logs.MyInsert("异常:" + ex.Message + "Struck:" + ex.StackTrace.ToString());
      }
    }
     
    /// <summary>
    /// unix时间转换为datetime
    /// </summary>
    /// <param name="timeStamp"></param>
    /// <returns></returns>
    private DateTime UnixTimeToTime(string timeStamp)
    {
      DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
      long lTime = long.Parse(timeStamp + "0000000");
      TimeSpan toNow = new TimeSpan(lTime);
      return dtStart.Add(toNow);
    }

    /// <summary>
    /// datetime转换为unixtime
    /// </summary>
    /// <param name="time"></param>
    /// <returns></returns>
    private int ConvertDateTimeInt(System.DateTime time)
    {
      System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
      return (int)(time - startTime).TotalSeconds;
    }

    /// <summary>
    /// 调用百度地图,返回坐标信息
    /// </summary>
    /// <param name="y">经度</param>
    /// <param name="x">纬度</param>
    /// <returns></returns>
    public string GetMapInfo(string x, string y)
    {
      try
      {
        string res = string.Empty;
        string parame = string.Empty;
        string url ="";
        parame = "latlng=" + x + "," + y + "&language=zh-CN&sensor=false";//此key为个人申请
        res = webRequestPost(url, parame);

        XmlDocument doc = new XmlDocument();

        doc.LoadXml(res);
        XmlElement rootElement = doc.DocumentElement;
        string Status = rootElement.SelectSingleNode("status").InnerText;
        if (Status == "OK")
        {
          //仅获取城市
          XmlNodeList xmlResults = rootElement.SelectSingleNode("/GeocodeResponse").ChildNodes;
          for (int i = 0; i < xmlResults.Count; i++)
          {
            XmlNode childNode = xmlResults[i];
            if (childNode.Name == "status")
            {
              continue;
            }

            string city = "0";
            for (int w = 0; w < childNode.ChildNodes.Count; w++)
            {
              for (int q = 0; q < childNode.ChildNodes[w].ChildNodes.Count; q++)
              {
                XmlNode childeTwo = childNode.ChildNodes[w].ChildNodes[q];

                if (childeTwo.Name == "long_name")
                {
                  city = childeTwo.InnerText;
                }
                else if (childeTwo.InnerText == "locality")
                {
                  return city;
                }
              }
            }
            return city;
          }
        }
      }
      catch (Exception ex)
      {
        //WriteTxt("map异常:" + ex.Message.ToString() + "Struck:" + ex.StackTrace.ToString());
        return "0";
      }

      return "0";
    }

    /// <summary>
    /// Post 提交调用抓取
    /// </summary>
    /// <param name="url">提交地址</param>
    /// <param name="param">参数</param>
    /// <returns>string</returns>
    public string webRequestPost(string url, string param)
    {
      byte[] bs = System.Text.Encoding.UTF8.GetBytes(param);

      HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url + "?" + param);
      req.Method = "Post";
      req.Timeout = 120 * 1000;
      req.ContentType = "application/x-www-form-urlencoded;";
      req.ContentLength = bs.Length;

      using (Stream reqStream = req.GetRequestStream())
      {
        reqStream.Write(bs, 0, bs.Length);
        reqStream.Flush();
      }
      using (WebResponse wr = req.GetResponse())
      {
        //在这里对接收到的页面内容进行处理 

        Stream strm = wr.GetResponseStream();

        StreamReader sr = new StreamReader(strm, System.Text.Encoding.UTF8);

        string line;

        System.Text.StringBuilder sb = new System.Text.StringBuilder();

        while ((line = sr.ReadLine()) != null)
        {
          sb.Append(line + System.Environment.NewLine);
        }
        sr.Close();
        strm.Close();
        return sb.ToString();
      }
    }

    private void WriteToDB(RequestXML requestXML,string _xml,int _pid)
    {
      wx_tmsg wx = new wx_tmsg();
      wx.AddNew();
      wx.FromUserName = requestXML.FromUserName;
      wx.ToUserName = requestXML.ToUserName;
      wx.MsgType = requestXML.MsgType;
      wx.Msg = requestXML.Content;
      wx.Creatime = requestXML.CreateTime;
      wx.Location_X = requestXML.Location_X;
      wx.Location_Y = requestXML.Location_Y;
      wx.Label = requestXML.Label;
      wx.Scale = requestXML.Scale;
      wx.PicUrl = requestXML.PicUrl;
      wx.reply = _xml;
      wx.pid = _pid;
      try
      {
        wx.Update();
      }
      catch (Exception ex)
      {
        wx_logs.MyInsert(ex.Message);
        //ex.message;
      }

    }
  }

  //微信请求类
  public class RequestXML
  {
    private string toUserName="";
    /// <summary>
    /// 消息接收方微信号,一般为公众平台账号微信号
    /// </summary>
    public string ToUserName
    {
      get { return toUserName; }
      set { toUserName = value; }
    }

    private string fromUserName = "";
    /// <summary>
    /// 消息发送方微信号
    /// </summary>
    public string FromUserName
    {
      get { return fromUserName; }
      set { fromUserName = value; }
    }

    private string createTime = "";
    /// <summary>
    /// 创建时间
    /// </summary>
    public string CreateTime
    {
      get { return createTime; }
      set { createTime = value; }
    }

    private string msgType = "";
    /// <summary>
    /// 信息类型 地理位置:location,文本消息:text,消息类型:image
    /// </summary>
    public string MsgType
    {
      get { return msgType; }
      set { msgType = value; }
    }

    private string content = "";
    /// <summary>
    /// 信息内容
    /// </summary>
    public string Content
    {
      get { return content; }
      set { content = value; }
    }

    private string location_X = "";
    /// <summary>
    /// 地理位置纬度
    /// </summary>
    public string Location_X
    {
      get { return location_X; }
      set { location_X = value; }
    }

    private string location_Y = "";
    /// <summary>
    /// 地理位置经度
    /// </summary>
    public string Location_Y
    {
      get { return location_Y; }
      set { location_Y = value; }
    }

    private string scale = "";
    /// <summary>
    /// 地图缩放大小
    /// </summary>
    public string Scale
    {
      get { return scale; }
      set { scale = value; }
    }

    private string label = "";
    /// <summary>
    /// 地理位置信息
    /// </summary>
    public string Label
    {
      get { return label; }
      set { label = value; }
    }

    private string picUrl = "";
    /// <summary>
    /// 图片链接,开发者可以用HTTP GET获取
    /// </summary>
    public string PicUrl
    {
      get { return picUrl; }
      set { picUrl = value; }
    }
}

说明: 其中用到的mijiya类,主要是调用金沙国际官网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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