public static string GetWxTokenId(){string token = "";string url = string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appid, secret);//向上面的地址发起httpget请求//这里是封装的一个http请求的类string content = HttpHelper.HttpGet(url);if (!string.IsNullOrEmpty(content)){var obj = JsonConvert.DeserializeObject<TokenResult>(content);if (!obj.errcode.HasValue){token = obj.access_token;}}return token;}

private class TokenResult{public string access_token { get; set; }public string expires_in { get; set; }public int? errcode { get; set; }public string errmsg { get; set; }}

 /// <summary>/// 获取ticket/// </summary>/// <param name="token">获取到的tokenid</param>/// <returns>strticket</returns>public static string GetTicket(string token){string getticketurl = string.Format("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token={0}&type=jsapi", token);string content = HttpHelper.HttpGet(getticketurl);JsApiTicket obj = JsonConvert.DeserializeObject<JsApiTicket>(content);return obj.ticket;}

//生成签名的随机串
string noncestr = Guid.NewGuid().ToString().Replace("-", "");

TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
string timestamp = Convert.ToInt64(ts.TotalSeconds).ToString();

string signature = MakeSha1Sign(string.Format("jsapi_ticket={0}&noncestr={1}&timestamp={2}&url={3}", jsapi_ticket, noncestr, timestamp, url));
/// <summary>/// SDK生成签名/// 注意：需要引用System.Security.dll/// </summary>/// <param name="str"></param>/// <returns>str签名</returns>public static string MakeSha1Sign(string str){byte[] StrRes = Encoding.Default.GetBytes(str);HashAlgorithm iSHA = new SHA1CryptoServiceProvider();StrRes = iSHA.ComputeHash(StrRes);StringBuilder EnText = new StringBuilder();foreach (byte iByte in StrRes){EnText.AppendFormat("{0:x2}", iByte);}return EnText.ToString();}

/// <summary>/// 获取调用微信接口用的SDKConfig/// </summary>/// <param name="url"></param>/// <returns>SDKConfig整个对象</returns>public static JsApiConfig GetJsSdkConfig(string url){//获取tokenidstring access_token = GetWxTokenId();//获取ticketstring jsapi_ticket = GetTicket(access_token);//生成签名的随机串string noncestr = Guid.NewGuid().ToString().Replace("-", "");//生成签名的时间戳TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);string timestamp = Convert.ToInt64(ts.TotalSeconds).ToString();//签名string signature = MakeSha1Sign(string.Format("jsapi_ticket={0}&noncestr={1}&timestamp={2}&url={3}", jsapi_ticket, noncestr, timestamp, url));JsApiConfig config = new JsApiConfig(){appId = appid,debug = false,nonceStr = noncestr,timestamp = timestamp,signature = signature,ticket = jsapi_ticket,//需要使用的JS接口列表jsApiList = new string[] { "chooseImage", "previewImage", "uploadImage", "downloadImage" }};return config;}

 $.post('/WapCardInfo/GetSDKConfig', { url: location.href.split('#')[0] }, function (data) {var configObj = data;wx.config({debug: false, // 开启调试模式,调用的所有api的返回值会在客户端alert出来，若要查看传入的参数，可以在pc端打开，参数信息会通过log打出，仅在pc端时才会打印。appId: configObj.appId, // 必填，公众号的唯一标识timestamp: configObj.timestamp, // 必填，生成签名的时间戳nonceStr: configObj.nonceStr, // 必填，生成签名的随机串signature: configObj.signature, // 必填，签名，见附录1
                jsApiList: ['checkJsApi','onMenuShareTimeline','onMenuShareAppMessage','onMenuShareQQ','onMenuShareWeibo','onMenuShareQZone'] // 必填，需要使用的JS接口列表，所有JS接口列表见附录2
            });
});

[HttpPost]public JsonResult GetSDKConfig(string url){try{//这里就是调用上面封装的方法JsSdkApi.jsapiConfig model = JsSdkApi.GetJsSdkConfig(url);return Json(model);}catch (Exception ex){LogHelper.Error("获取wxconfig出现异常：" + ex.Message.Replace("'", "\""));return Json(new JsSdkApi.jsapiConfig());}}