if (Request.QueryString["code"] == null || Request.QueryString["code"] == "")
            {
                string host = Request.Url.Host;
                string path = Request.Path;
                string redirect_uri = HttpUtility.UrlEncode("http://" + host + path);
                Log.Debug(this.GetType().ToString(), "Current page URL : " + redirect_uri);
                WxPayData data = new WxPayData();
                data.SetValue("appid", WxPayConfig.APPID);
                data.SetValue("redirect_uri", redirect_uri);
                data.SetValue("response_type", "code");
                data.SetValue("scope", "snsapi_base");
                data.SetValue("state", "STATE" + "#wechat_redirect");
                string url = "https://open.weixin.qq.com/connect/oauth2/authorize?" + data.ToUrl();
                Log.Debug(this.GetType().ToString(), "Will Redirect to URL : " + url);

                

                Response.Redirect(url);

                //System.Environment.Exit(0);
                Response.End();
                Log.Debug(this.GetType().ToString(), "If print this sentence, it is error!!!");
            }
            else
            {
                string code = Request.QueryString["code"];
                Log.Debug(this.GetType().ToString(), "Get code : " + code);
                //构造获取openid及access_token的url
                WxPayData data3 = new WxPayData();
                data3.SetValue("appid", WxPayConfig.APPID);
                data3.SetValue("secret", WxPayConfig.APPSECRET);
                data3.SetValue("code", code);
                data3.SetValue("grant_type", "authorization_code");
                string url3 = "https://api.weixin.qq.com/sns/oauth2/access_token?" + data3.ToUrl();
                //请求url以获取数据
                HttpWebRequest objRequest = (HttpWebRequest)WebRequest.Create(url3);
                objRequest.Method = "GET";
                WebProxy proxy = new WebProxy();                          //定义一个网关对象
                proxy.Address = new Uri("http://10.152.18.220:8080");              //网关服务器端口:端口
                objRequest.Proxy = proxy;
                string result = "";
                HttpWebResponse objResponse = (HttpWebResponse)objRequest.GetResponse();
                using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
                {
                    result = sr.ReadToEnd();
                    sr.Close();
                }
                Log.Debug(this.GetType().ToString(), "Get access_token : " + result);
                //保存access_token，用于收货地址获取
                JsonData jd = JsonMapper.ToObject(result);
                string access_token = (string)jd["access_token"];
                string openid = (string)jd["openid"];
                Log.Debug(this.GetType().ToString(), "Get openid : " + openid);

                //统一下单
                WxPayData data2 = new WxPayData();
                data2.SetValue("body", "test");//
                data2.SetValue("attach", "test");
                data2.SetValue("out_trade_no", WxPayApi.GenerateOutTradeNo());
                data2.SetValue("total_fee", 1);
                data2.SetValue("time_start", DateTime.Now.ToString("yyyyMMddHHmmss"));
                data2.SetValue("time_expire", DateTime.Now.AddMinutes(10).ToString("yyyyMMddHHmmss"));
                data2.SetValue("goods_tag", "test");
                data2.SetValue("trade_type", "JSAPI");
                data2.SetValue("openid", openid);
                WxPayData result2 = WxPayApi.UnifiedOrder(data2);
                if (!result2.IsSet("appid") || !result2.IsSet("prepay_id") || result2.GetValue("prepay_id").ToString() == "")
                {
                    Log.Error(this.GetType().ToString(), "UnifiedOrder response error!");
                    throw new WxPayException("UnifiedOrder response error!");
                }


                WxPayData jsApiParam = new WxPayData();
                jsApiParam.SetValue("appId", result2.GetValue("appid"));
                jsApiParam.SetValue("timeStamp", WxPayApi.GenerateTimeStamp());
                jsApiParam.SetValue("nonceStr", WxPayApi.GenerateNonceStr());
                jsApiParam.SetValue("package", "prepay_id=" + result2.GetValue("prepay_id"));
                jsApiParam.SetValue("signType", "MD5");
                jsApiParam.SetValue("paySign", jsApiParam.MakeSign());
                string parameters = jsApiParam.ToJson();
                Log.Info(this.GetType().ToString(), "Get jsApiParam : " + parameters);
                wxJsApiParam = parameters;

                //获取收货地址
                string parameter2 = null;
                try
                {
                    WxPayData signData = new WxPayData();
                    signData.SetValue("appid", WxPayConfig.APPID);
                    signData.SetValue("url", Request.Url.ToString());
                    signData.SetValue("timestamp", WxPayApi.GenerateTimeStamp());
                    signData.SetValue("nonce_str", WxPayApi.GenerateNonceStr());
                    signData.SetValue("accesstoken", access_token);
                    string param = signData.ToUrl();

                    Log.Info(this.GetType().ToString(), "GetEditAddressParam param : " + param);

                    string addrSign = FormsAuthentication.HashPasswordForStoringInConfigFile(param, "SHA1");

                    WxPayData afterData = new WxPayData();
                    afterData.SetValue("appId", WxPayConfig.APPID);
                    afterData.SetValue("scope", "jsapi_address");
                    afterData.SetValue("signType", "sha1");
                    afterData.SetValue("addrSign", addrSign);
                    afterData.SetValue("timeStamp", signData.GetValue("timestamp"));
                    afterData.SetValue("nonceStr", signData.GetValue("nonce_str"));

                    parameter2 = afterData.ToJson();
                }
                catch (Exception ex)
                {
                    Log.Error(this.GetType().ToString(), ex.ToString());
                }

                Log.Info(this.GetType().ToString(), "Get EditAddressParam : " + parameter2);
                wxEditAddrParam = parameter2;
            }