WxPayAPI.JsApiPay.GetOpenidAndAccessToken C# (CSharp) Method

        public void GetOpenidAndAccessToken()
        {
            if (!string.IsNullOrEmpty(page.Request.QueryString["code"]))
            {
                //获取code码，以获取openid和access_token
                string code = page.Request.QueryString["code"];
                GetOpenidAndAccessTokenFromCode(code);
            }
            else
            {
                //构造网页授权获取code的URL
                string host = page.Request.Url.Host;
                string path = page.Request.Path;
                string redirect_uri = HttpUtility.UrlEncode("http://" + host + path);
                WxPayData data = new WxPayData();
                data.SetValue("appid", 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();
                try
                {
                    //触发微信返回code码
                    page.Response.Redirect(url);//Redirect函数会抛出ThreadAbortException异常，不用处理这个异常
                }
                catch(System.Threading.ThreadAbortException ex)
                {
                }
            }
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            Log.Info(this.GetType().ToString(), "page load");
            if (!IsPostBack)
            {
                JsApiPay jsApiPay = new JsApiPay(this);
                try
                {
                    //调用【网页授权获取用户信息】接口获取用户的openid和access_token
                    jsApiPay.GetOpenidAndAccessToken();

                    //获取收货地址js函数入口参数
                    wxEditAddrParam     = jsApiPay.GetEditAddressParameters();
                    ViewState["openid"] = jsApiPay.openid;
                }
                catch (Exception ex)
                {
                    Response.Write("<span style='color:#FF0000;font-size:20px'>" + "页面加载出错，请重试" + "</span>");
                    Button1.Visible = false;
                    Button2.Visible = false;
                    Label1.Visible  = false;
                    Label2.Visible  = false;
                }
            }
        }