C# 微信公众平台开发（2）-- 微信菜单

上一篇了解微信开发者中心 URL的配置验证；

1. 验证成功后，就可以对获取的接口权限进行操作

自定义菜单接口可实现多种类型按钮，用的比较多的是

1.click：点击推事件

　　　用户点击click类型按钮后，微信服务器会通过消息接口推送消息类型为event 的结构给开发者（参考消息接口指南），并且带上按钮中开发者填写的key值，开发者可以通过自定义的key值与用户进行交互；

2、view：跳转URL

　　用户点击view类型按钮后，微信客户端将会打开开发者在按钮中填写的网页URL，可与网页授权获取用户基本信息接口结合，获得用户基本信息。

自定义菜单接口调用：

　　http请求方式：POST（请使用https协议） https://api.weixin.qq.com/cgi-bin/menu/create?access_token=ACCESS_TOKEN

　　ACCESS_TOKEN 需要通过接口获取

由于ACCESS_TOKEN 一天只能调用 2000，可以将ACCESS_TOKEN  保存起来，有效时间内不需要重新调用接口

  /// <summary>
        /// 获取凭证接口
        /// </summary>
        /// <param name="grant_type">获取access_token填写client_credential</param>
        /// <param name="appid">第三方用户唯一凭证</param>
        /// <param name="secret">第三方用户唯一凭证密钥，既appsecret</param>
        /// <returns></returns>
        public static string GetAccessToken(string appid, string secret)
        {
            string token = OperationXml.GetXMLToken();
            if (token == "")
            {
                string strJson = RequestUrl(string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appid, secret));
                token = GetJsonValue(strJson, "access_token");
                OperationXml.UpdateXMLToken(token, DateTime.Now);
            }

            return token;
        }
 public static string RequestUrl(string strUrl)
        {
            // 设置参数
            HttpWebRequest request = WebRequest.Create(strUrl) as HttpWebRequest;
            CookieContainer cookieContainer = new CookieContainer();
            request.CookieContainer = cookieContainer;
            request.AllowAutoRedirect = true;
            request.Method = "POST";
            request.ContentType = "text/html";
            request.Headers.Add("charset", "utf-8");

            //发送请求并获取相应回应数据
            HttpWebResponse response = request.GetResponse() as HttpWebResponse;
            //直到request.GetResponse()程序才开始向目标网页发送Post请求
            Stream responseStream = response.GetResponseStream();
            StreamReader sr = new StreamReader(responseStream, Encoding.UTF8);
            //返回结果网页（html）代码
            string content = sr.ReadToEnd();
            return content;
        }

#region 获取Json字符串某节点的值

        /// <summary>
        /// 获取Json字符串某节点的值
        /// </summary>
        public static string GetJsonValue(string jsonStr, string key)
        {
            string result = string.Empty;
            if (!string.IsNullOrEmpty(jsonStr))
            {
                key = "\"" + key.Trim('"') + "\"";
                int index = jsonStr.IndexOf(key) + key.Length + ;
                if (index > key.Length + )
                {
                    //先截逗号，若是最后一个，截“｝”号，取最小值
                    int end = jsonStr.IndexOf(',', index);
                    if (end == -)
                    {
                        end = jsonStr.IndexOf('}', index);
                    }

                    result = jsonStr.Substring(index, end - index);
                    result = result.Trim(new char[] { '"', ' ', '\'' }); //过滤引号或空格
                }
            }
            return result;
        }

        #endregion

  /// <summary>
        /// 获取XML文件路径
        /// </summary>
        public static string xmlName = AppDomain.CurrentDomain.BaseDirectory + @"\AccessToken.xml";

        /// <summary>
        /// 读取XML  Token
        /// </summary>
        /// <param name="xmlUrl"></param>
        /// <returns></returns>
        public static string GetXMLToken()
        {
            try
            {
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(xmlName);

                XmlNode xn = xmlDoc.SelectSingleNode("ACCESS_TOKEN");
                XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型
                string Token = "";
                string CreateTime = "";
                foreach (XmlNode xn1 in xe)//遍历
                {
                    XmlElement xe2 = (XmlElement)xn1;//转换类型
                    if (xe2.Name == "Token")//如果找到
                    {
                        Token = xe2.InnerText;//则修改
                    }
                    if (xe2.Name == "CreateTime")//如果找到
                    {
                        CreateTime = xe2.InnerText;//则修改
                    }
                }

                int seconds = ;

                if (CreateTime.Trim() != "")
                {
                    DateTime ct = Convert.ToDateTime(CreateTime);
                    TimeSpan ts = (DateTime.Now - ct);
                    seconds = ts.Milliseconds;
                }
                LogTextHelper.WriteLogToFile("Token：" + Token);
                if (seconds >  || seconds == )
                {
                    return "";
                }
                else
                {
                    return Token;
                }
            }
            catch (Exception ex)
            {
                LogTextHelper.WriteLogToFile("异常：" + ex.ToString());
                return "";
            }
        }

        /// <summary>
        /// 修改Token
        /// </summary>
        /// <param name="token"></param>
        /// <param name="createTime"></param>
        public static void UpdateXMLToken(string token, DateTime createTime)
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlName);

            XmlNode xn = xmlDoc.SelectSingleNode("ACCESS_TOKEN");
            XmlElement xe = (XmlElement)xn;//将子节点类型转换为XmlElement类型 

            foreach (XmlNode xn1 in xe)//遍历
            {
                XmlElement xe2 = (XmlElement)xn1;//转换类型
                if (xe2.Name == "Token")//如果找到
                {
                    xe2.InnerText = token;//则修改
                }
                if (xe2.Name == "CreateTime")//如果找到
                {
                    xe2.InnerText = createTime.ToString();//则修改
                }
            }
            xmlDoc.Save(xmlName);

        }

获取Token

   #region 创建菜单

         public string CreateMenuPage(string posturl, string postData)
         {
             Stream outstream = null;
             Stream instream = null;
             StreamReader sr = null;
             HttpWebResponse response = null;
             HttpWebRequest request = null;
             Encoding encoding = Encoding.UTF8;
             byte[] data = encoding.GetBytes(postData);
             // 准备请求...
             try
             {
                 // 设置参数
                 request = WebRequest.Create(posturl) as HttpWebRequest;
                 CookieContainer cookieContainer = new CookieContainer();
                 request.CookieContainer = cookieContainer;
                 request.AllowAutoRedirect = true;
                 request.Method = "POST";
                 request.ContentType = "application/x-www-form-urlencoded";
                 request.ContentLength = data.Length;
                 outstream = request.GetRequestStream();
                 outstream.Write(data, , data.Length);
                 outstream.Close();
                 //发送请求并获取相应回应数据
                 response = request.GetResponse() as HttpWebResponse;
                 //直到request.GetResponse()程序才开始向目标网页发送Post请求
                 instream = response.GetResponseStream();
                 sr = new StreamReader(instream, encoding);
                 //返回结果网页（html）代码
                 string content = sr.ReadToEnd();
                 string err = string.Empty;
                 Response.Write(content);
                 return content;
             }
             catch (Exception ex)
             {
                 string err = ex.Message;
                 return string.Empty;
             }
         }

         #endregion

         #region 删除菜单

         public JsonResult DelMenu()
         {
             string postUrl = "https://api.weixin.qq.com/cgi-bin/menu/delete?access_token={0}";
             postUrl = string.Format(postUrl, CommonApi.GetAccessToken(strAppID, strAppSecret));
             string menuInfo = getMenuInfo();
             string result = CommonApi.PostWebRequest(postUrl, menuInfo);

             return Json(result, JsonRequestBehavior.AllowGet);
         }

         #endregion

         #region 获取菜单

         public string GetMenuList(string posturl)
         {
             Stream instream = null;
             StreamReader sr = null;
             HttpWebResponse response = null;
             HttpWebRequest request = null;
             Encoding encoding = Encoding.UTF8;
             // 准备请求...
             try
             {
                 // 设置参数
                 request = WebRequest.Create(posturl) as HttpWebRequest;
                 CookieContainer cookieContainer = new CookieContainer();
                 request.CookieContainer = cookieContainer;
                 request.AllowAutoRedirect = true;
                 request.Method = "GET";
                 request.ContentType = "application/x-www-form-urlencoded";
                 //发送请求并获取相应回应数据
                 response = request.GetResponse() as HttpWebResponse;
                 //直到request.GetResponse()程序才开始向目标网页发送Post请求
                 instream = response.GetResponseStream();
                 sr = new StreamReader(instream, encoding);
                 //返回结果网页（html）代码
                 string content = sr.ReadToEnd();
                 string err = string.Empty;
                 Response.Write(content);
                 return content;
             }
             catch (Exception ex)
             {
                 string err = ex.Message;
                 return string.Empty;
             }
         }

         #endregion

  private string getMenuInfo()
         {
  {
      "button":[
      {
           "type":"click",
           "name":"今日歌曲",
           "key":"V1001_TODAY_MUSIC"
       },
       {
            "name":"菜单",
            "sub_button":[
            {
                "type":"view",
                "name":"搜索",
                "url":"http://www.soso.com/"
             },
             {
                "type":"view",
                "name":"视频",
                "url":"http://v.qq.com/"
             },
             {
                "type":"click",
                "name":"赞一下我们",
                "key":"V1001_GOOD"
             }]
        }]
  }
        ｝    

菜单操作

发布服务器，执行下，在微信公众号上就可以看到自己定义的菜单了

请点击我 --我爱足球

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