c# 微信公众号开发（一）服务器配置，验证token

新建一个一般处理程序，WechartInterface.ashx

程序代码

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            string token = "与网页填写的token保持一致";
            if (string.IsNullOrEmpty(token))
            {
                return;
            }
            string echoString = HttpContext.Current.Request.QueryString["echoStr"];
            string signature = HttpContext.Current.Request.QueryString["signature"];
            string timestamp = HttpContext.Current.Request.QueryString["timestamp"];
            string nonce = HttpContext.Current.Request.QueryString["nonce"];
            if (CheckSignature(token, signature, timestamp, nonce))
            {
                if (!string.IsNullOrEmpty(echoString))
                {
                    HttpContext.Current.Response.Write(echoString);
                    HttpContext.Current.Response.End();
                }
            }
        }
        /// 

        /// 验证微信签名
        /// 
        public static bool CheckSignature(string token, string signature, string timestamp, string nonce)
        {
            string[] ArrTmp = { token, timestamp, nonce };
            //字典排序
            Array.Sort(ArrTmp);
            //拼接
            string tmpStr = string.Join("", ArrTmp);
            //sha1验证
            tmpStr = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
            //tmpStr = Membership.CreateUser(tmpStr, "SHA1");
            tmpStr = tmpStr.ToLower();
            if (tmpStr == signature)
            {
                return true;
            }
            else
            {
                return false;
            }
        }