.NET微信公众号开发-3.0查询自定义菜单

        PRotected void Page_Load(object sender, EventArgs e)        {            var str = GetPage("https://api.weixin.QQ.com/cgi-bin/token?grant_type=client_credential&appid=wxd811f56f3&secret=76eb33f661296");            JObject jo = JObject.Parse(str);            access_token = jo["access_token"].ToString();            GetPage("https://api.weixin.qq.com/cgi-bin/menu/get?access_token=" + access_token + "");            //GetPage("https://api.weixin.qq.com/cgi-bin/menu/delete?access_token=access_token");        }

    /// <summary>    /// 微信许可令牌    /// </summary>    public class AccessToken    {        /// <summary>        /// 保存已获取到的许可令牌，键为公众号，值为公众号最后一次获取到的令牌        /// </summary>        private static ConcurrentDictionary<string, Tuple<AccessToken, DateTime>> accessTokens = new ConcurrentDictionary<string, Tuple<AccessToken, DateTime>>();        /// <summary>        /// 获取access token的地址        /// </summary>        private const string urlForGettingAccessToken = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}";        /// <summary>        /// 获取access token的http方法        /// </summary>        private const string httpMethodForGettingAccessToken = WebRequestMethods.Http.Get;        /// <summary>        /// 保存access token的最长时间（单位：秒），超过时间之后，需要重新获取        /// </summary>        private const int accessTokenSavingSeconds = 7000;        /// <summary>        /// access token        /// </summary>        public string access_token { get; set; }        /// <summary>        /// 有效时间，单位：秒        /// </summary>        public int expires_in { get; set; }        /// <summary>        /// 构造函数        /// </summary>        /// <param name="_access_token">access token</param>        /// <param name="_expires_in">有效时间</param>        internal AccessToken(string _access_token, int _expires_in)        {            access_token = _access_token;            expires_in = _expires_in;        }        /// <summary>        /// 返回AccessToken字符串        /// </summary>        /// <returns></returns>        public override string ToString()        {            return string.Format("AccessToken：{0}/r/n有效时间：{1}秒", access_token, expires_in);        }        /// <summary>        /// 从JSON字符串解析AccessToken        /// </summary>        /// <param name="json">JSON字符串</param>        /// <returns>返回AccessToken</returns>        internal static AccessToken ParseFromJson(string json)        {            var at = JsonConvert.DeserializeAnonymousType(json, new { access_token = "", expires_in = 1 });            return new AccessToken(at.access_token, at.expires_in);        }        /// <summary>        /// 尝试从JSON字符串解析AccessToken        /// </summary>        /// <param name="json">JSON字符串</param>        /// <param name="msg">如果解析成功，返回AccessToken；否则，返回null。</param>        /// <returns>返回是否解析成功</returns>        internal static bool TryParseFromJson(string json, out AccessToken token)        {            bool success = false;            token = null;            try            {                token = ParseFromJson(json);                success = true;            }            catch { }            return success;        }        /// <summary>        /// 得到access token        /// </summary>        /// <param name="userName">公众号</param>        /// <returns>返回access token</returns>        public static AccessToken Get(string userName)        {            Tuple<AccessToken, DateTime> lastToken = accessTokens.ContainsKey(userName) ? accessTokens[userName] : null;            AccessToken token = lastToken == null ? null : lastToken.Item1;            DateTime refreshTime = lastToken == null ? DateTime.MinValue : lastToken.Item2;            double ms = (DateTime.Now - refreshTime).TotalSeconds;            if (ms > accessTokenSavingSeconds || token == null)            {                //尝试从微信服务器获取2次                ErrorMessage msg;                AccessToken newToken = GetFromWeixinServer(userName, out msg);                if (newToken == null)                    newToken = GetFromWeixinServer(userName, out msg);                if (newToken != null)                {                    lastToken = new Tuple<AccessToken, DateTime>(newToken, DateTime.Now);                    accessTokens[userName] = lastToken;                    token = newToken;                }            }            return token;        }        /// <summary>        /// 从微信服务器获取access token        /// </summary>        /// <param name="userName">公众号</param>        /// <param name="msg">从服务器返回的错误信息。</param>        /// <returns>返回许可令牌；如果获取失败，返回null。</returns>        private static AccessToken GetFromWeixinServer(string userName, out ErrorMessage msg)        {            AccessToken token = null;            msg = new ErrorMessage(ErrorMessage.ExceptionCode, "");            string url = string.Format(urlForGettingAccessToken, WxPayConfig.APPID, WxPayConfig.APPSECRET);            string result;            if(!HttpHelper.Request(url, out result, httpMethodForGettingAccessToken, string.Empty))            {                msg.errmsg = "从微信服务器获取响应失败。";                return token;            }            if (ErrorMessage.IsErrorMessage(result))                msg = ErrorMessage.Parse(result);            else            {                try                {                    token = AccessToken.ParseFromJson(result);                }                catch (Exception e)                {                    msg = new ErrorMessage(e);                }            }            return token;        }    }

        protected void Page_Load(object sender, EventArgs e)        {

              string username = System.Configuration.ConfigurationManager.AppSettings["weixinid"].ToString();
              AccessToken token = AccessToken.Get(username);

            GetPage("https://api.weixin.qq.com/cgi-bin/menu/get?access_token=" + access_token + "");            //GetPage("https://api.weixin.qq.com/cgi-bin/menu/delete?access_token=access_token");        }