/// <summary>

        /// 获取微信凭证 signature

        /// </summary>

        protected void GetAccessSignature()

        {

            string s = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";

            string r = string.Empty;

            Random random = new Random();

            Enumerable.Repeat<int>(0, 16).ToList().ForEach(x => r += s[random.Next(s.Length)]);

            string noncestr = r;

            string jsapi_ticket = GetAccessTicket();

            int timestamp = Int32.Parse(((DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000).ToString());

            string url = "http://wechat.xxxx.com/list.aspx";

            string queryString = "jsapi_ticket=" + jsapi_ticket + "&noncestr=" + noncestr + "&timestamp=" + timestamp + "&url=" + url;

            string signature = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(queryString, "SHA1");



            Msignature mC = new Msignature();

            mC.appid = ConfigurationManager.AppSettings["Appid"].ToString();

            mC.noncestr = noncestr;

            mC.timestamp = timestamp;

            mC.signature = signature.ToLower();

            Response.Write(JsonConvert.SerializeObject(mC));

        }

                    _appid = wC[0].appid;

                    _timestamp = wC[0].timestamp;

                    _nonceStr = wC[0].noncestr;

                    _signature = wC[0].signature;

                    //alert(_signature);

                    wx.config({

                        debug: false,

                        appId: _appid,

                        timestamp: _timestamp,

                        nonceStr: _nonceStr,

                        signature: _signature,

                        jsApiList: ['checkJsApi', 'onMenuShareTimeline', 'onMenuShareAppMessage']

                    });

                    //alert(location.href.split('#')[0]);

                    wx.ready(function () {

                        wx.onMenuShareTimeline({

                            title: '测试',

                            link: 'http://wechat.xxxx.com',

                            imgUrl: 'http://www.tyninfo.com/data/upload/shop/editor/web-122-122-1.jpg?488',

                            success: function () {

                                alert("分享成功");

                            },

                            cancel: function () {

                                alert("您取消了分享");

                            }

                        });