支付宝小程序开发系列二： 获取支付宝用户user

第一步：获取授权码信息

my.getAuthCode({
                  scopes: 'auth_base',
                  success: (res) => {
                    // res.authCode
                    //发送授权码到服务后台进行解析
                  }
                });

 第二步：解析授权码（SDK：https://download.csdn.net/download/qq_36894527/12875709）

/// 

        /// 获取支付宝用户id
        /// 
        /// 小程序授权码
        /// appid
        /// 应用私钥,和应用公钥匹配 在密钥生产器中可见
        /// 支付宝公钥（区别于应用公钥），开放平台中接口加签方式中可见
        /// 
        public static string GetUserID(string auth_code, string app_id, string merchant_private_key, string alipay_public_key)
        {
            string result = "";
            
            try
            {
                IAopClient client = new DefaultAopClient("https://openapi.alipay.com/gateway.do", app_id, merchant_private_key, "json", "1.0", "RSA2", alipay_public_key, "GBK", false);
                AlipaySystemOauthTokenRequest request = new AlipaySystemOauthTokenRequest();
                request.GrantType = "authorization_code";
                request.Code = auth_code;
                request.RefreshToken = "";
                AlipaySystemOauthTokenResponse response = client.Execute(request);
                JObject jobj = (JObject)JsonConvert.DeserializeObject(response.Body);
                JObject jk = (JObject)jobj["alipay_system_oauth_token_response"];
                if (jk.Property("code") == null)
                {
                    string user_id = jobj["alipay_system_oauth_token_response"]["user_id"].ToString();
                    result = ReturnInfo.ListReturn("S", "", user_id);
                }
                else
                {
                    string msg = jobj["alipay_system_oauth_token_response"]["msg"].ToString();
                    result = ReturnInfo.ListReturn("E", msg, "");
                }
            }
            catch (Exception ex)
            {
                result = ReturnInfo.ListReturn("E", ex.Message, "");
            }
            return result;
        }