#region 验证Token

        /// <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 static bool CheckSignature(string Token, string signature, string timestamp, string nonce)

        {

            string[] arrTmp = { Token, timestamp, nonce };

            Array.Sort(arrTmp);

            string tmpStr = string.Join("", arrTmp);

            tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");

            if (tmpStr != null)

            {

                tmpStr = tmpStr.ToLower();

                return tmpStr == signature;

            }

            return false;

        }

        #endregion

 public ActionResult TestToken()

        {

            #region 验证Token

            string echoStr = Request.QueryString["echoStr"];

            string signature = Request.QueryString["signature"];

            string timestamp = Request.QueryString["timestamp"];

            string nonce = Request.QueryString["nonce"];

            if (AdminUtil.CheckSignature("微信公众号基本配置中的Token（令牌）", signature, timestamp, nonce) && !string.IsNullOrEmpty(echoStr))

            {

                Response.Write(echoStr);

                Response.End();

            }

            #endregion

            return View();

        }