微信公众号开发网页授权获取用户基本信息

注意：网页授权两种方式

更多网页授权请查阅官网文档：网页授权

静默授权

静默授权即可以在用户关注的的时候，获取用户基本信息，此过程用户无感知。

第一步，通过工厂类 转发请求

 /// <returns></returns>
        public string HandleRequest()
        {
            string response = string.Empty;
            EventMessage em = EventMessage.LoadFromXml(RequestXml);
            if (em != null)
            {
                switch (em.Event.ToLower())
                {
                    case ("subscribe"):
                        response = SubscribeEventHandler(em);//通过工厂类分发过来的请求，匹配到关注事件
                        break;
                    case ("unsubscribe"):
                        response = Un_SubscribeEventHandler(em);
                        break;
                    case "click":
                        response = ClickEventHandler(em);
                        break;
                }
            }
            return response;
        }

第二步，写用户关注事件

 
         
         
         
         
            WeChat.Messages.TextMessage tm = = em.FromUserName;
            tm.FromUserName = em.ToUserName;
            tm.CreateTime ==

 　　　　　　return tm.GenerateContent();
 }

第三步，根据得到的OpenId及accesstoken，即可获取用户基本信息（此处演示是将该用户存入数据库中）

/// <summary>
        /// 根据OpenId将此条粉丝记录插入数据库中
        /// </summary>
        /// <param name="FromUserName"></param>
        /// <param name="ToUserName"></param>
        public void ShowUserInfo(string FromUserName, string ToUserName)
        {
            try
            {
                Models.Users user = new Models.Users();
                DAL.User userInfo = new DAL.User();
                //获取accesstoken，获取用户基本信息需要Openid和accesstoken即可
　　　　　　　　 accesstoken = Utility.Context.AccessToken;
　　　　　　　　 string url = string.Format("https://api.weixin.qq.com/cgi-bin/user/info?access_token={0}&openid={1}&lang=zh_CN", accesstoken, FromUserName);
               string result = HttpUtility.GetData(url);
               XDocument doc = XmlUtility.ParseJson(result, "root");
               XElement root = doc.Root;
               if (root != null)
               {
                    #region 取值/存值
                    
                    subscribe = root.Element("subscribe").Value;//是否关注 1 是关注 
                    nickname = root.Element("nickname").Value; //昵称
                    sex = root.Element("sex").Value; //性别什么
                    headimgurl = root.Element("headimgurl").Value; //头像url
                    province = root.Element("province").Value;//地区 
                    country = root.Element("country").Value;
                    language = root.Element("language").Value;
                    subscribe_time = root.Element("subscribe_time").Value;
                    DateTime create_time = Common.GetTime(subscribe_time);//将时间戳转换为当前时间
                    city = root.Element("city").Value;
                    user.OpenID = FromUserName;//OpenID即粉丝ID
                    user.PublicId = ToUserName;
                    user.UserID = FromUserName;
                    user.NickName = nickname;
                    user.Sex = int.Parse(sex);
                    user.Subscribe = int.Parse(subscribe);
                    user.Country = country;
                    user.Province = province;
                    user.City = city;
                    user.CreateDate = create_time;
                    user.HeadimgUrl = headimgurl;
                    //将user实体存入数据库中
                    bool show = _user.Add(user);
                    #endregion
                }
            }
            catch
            {
                throw (new ArgumentNullException());
            }

        }

上面代码中 AccessToken的实现，新建一个Context类即可

private static DateTime GetAccessToken_Time;
        /// <summary>
        /// 过期时间为7200秒
        /// </summary>
        private static int Expires_Period = 7200;
        /// <summary>
        /// 
        /// </summary>
        private static string mAccessToken;

        public static string AppID = "换成相应公众号的即可";
        public static string AppSecret = "换成相应公众号的即可";
        /// <summary>
        /// 调用获取ACCESS_TOKEN,包含判断是否过期
        /// </summary>
        public static string AccessToken
        {
            get
            {
                //如果为空，或者过期，需要重新获取
                if (string.IsNullOrEmpty(mAccessToken) || HasExpired())
                {
                    //获取access_token
                    mAccessToken = GetAccessToken(AppID, AppSecret);
                }

                return mAccessToken;
            }
        }
        /// <summary>
        /// 获取ACCESS_TOKEN方法
        /// </summary>
        /// <param name="appId"></param>
        /// <param name="appSecret"></param>
        /// <returns></returns>
        private static string GetAccessToken(string appId, string appSecret)
        {
            string url = string.Format("https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}", appId, appSecret);
            string result = HttpUtility.GetData(url);

            XDocument doc = XmlUtility.ParseJson(result, "root");
            XElement root = doc.Root;
            if (root != null)
            {
                XElement access_token = root.Element("access_token");
                if (access_token != null)
                {
                    GetAccessToken_Time = DateTime.Now;
                    if (root.Element("expires_in") != null)
                    {
                        Expires_Period = int.Parse(root.Element("expires_in").Value);
                    }
                    return access_token.Value;
                }
                else
                {
                    GetAccessToken_Time = DateTime.MinValue;
                }
            }

            return null;
        }
        /// <summary>
        /// 判断Access_token是否过期
        /// </summary>
        /// <returns>bool</returns>
        private static bool HasExpired()
        {
            if (GetAccessToken_Time != null)
            {
                //过期时间，允许有一定的误差，一分