微信公众号开发之网页授权获取用户基本信息

 目录

（一）微信公众号开发之VS远程调试

（二）微信公众号开发之基础梳理

（三）微信公众号开发之自动消息回复和自定义菜单

（四）微信公众号开发之网页授权获取用户基本信息

（五）微信公众号开发之网页中及时获取当前用户Openid及注意事项

（六）微信公众号开发之扫码支付

（七）微信公众号开发之公众号支付

（八）微信公众号开发之现金红包

（九）微信公众号开发之回复图文消息(被动)

前言

 如果用户在微信客户端中访问第三方网页，公众号可以通过微信网页授权机制，来获取用户基本信息，进而实现业务逻辑。

 

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

　　　　　/// <summary>
        /// 用户关注
        /// </summary>
        /// <param name="em"></param>
        /// <returns></returns>
        public string SubscribeEventHandler(EventMessage em)
        {
            //回复欢迎消息
            WeChat.Messages.TextMessage tm = new WeChat.Messages.TextMessage();
            tm.ToUserName = em.FromUserName;//OpenId
            tm.FromUserName = em.ToUserName;//公众号原始Id
            tm.CreateTime = Common.GetNowTime();
            tm.Content = "欢迎您关注****，我是服务小二，有事就问我～\n\n";
            tm.GenerateContent();
            //如有业务需要，可在此处先判断该用户是否已关注
　　　　　　　//此处得到OpenId
　　　　　　　show.ShowUserInfo(em.FromUserName,em.ToUserName);

 　　　　　　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，一分钟。获取时间消耗
                if (DateTime.Now > GetAccessToken_Time.AddSeconds(Expires_Period).AddSeconds(-60))
                {
                    return true;
                }
            }
            return false;
        }

GetData的实现

　　　　 public static string GetData(string url)
        {
            return SendGetHttpRequest(url, "application/x-www-form-urlencoded");
        }

ParseJson的实现

　　　　　public static XDocument ParseJson(string json, string rootName)
        {
            return JsonConvert.DeserializeXNode(json, rootName);
        }

关于第三步的 HttpUtility类中还有一些其他公用帮助方法，在这里一并放出，调用即可

/// <summary>
        /// 发送请求
        /// </summary>
        /// <param name="url">Url地址</param>
        /// <param name="data">数据</param>
        public static string SendHttpRequest(string url, string data)
        {
            return SendPostHttpRequest(url, "application/x-www-form-urlencoded", data);
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        public static string GetData(string url)
        {
            return SendGetHttpRequest(url, "application/x-www-form-urlencoded");
        }

        /// <summary>
        /// 发送请求
        /// </summary>
        /// <param name="url">Url地址</param>
        /// <param name="method">方法（post或get）</param>
        /// <param name="method">数据类型</param>
        /// <param name="requestData">数据</param>
        public static string SendPostHttpRequest(string url, string contentType, string requestData)
        {
            WebRequest request = (WebRequest)HttpWebRequest.Create(url);
            request.Method = "POST";
            byte[] postBytes = null;
            request.ContentType = contentType;
            postBytes = Encoding.UTF8.GetBytes(requestData);
            request.ContentLength = postBytes.Length;
            using (Stream outstream = request.GetRequestStream())
            {
                outstream.Write(postBytes, 0, postBytes.Length);
            }
            string result = string.Empty;
            using (WebResponse response = request.GetResponse())
            {
                if (response != null)
                {
                    using (Stream stream = response.GetResponseStream())
                    {
                        using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
                        {
                            result = reader.ReadToEnd();
                        }
                    }

                }
            }
            return result;
        }

        /// <summary>
        /// 发送请求
        /// </summary>
        /// <param name="url">Url地址</param>
        /// <param name="method">方法（post或get）</param>
        /// <param name="method">数据类型</param>
        /// <param name="requestData">数据</param>
        public static string SendGetHttpRequest(string url, string contentType)
        {
            WebRequest request = (WebRequest)HttpWebRequest.Create(url);
            request.Method = "GET";
            request.ContentType = contentType;
            string result = string.Empty;
            using (WebResponse response = request.GetResponse())
            {
                if (response != null)
                {
                    using (Stream stream = response.GetResponseStream())
                    {
                        using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
                        {
                            result = reader.ReadToEnd();
                        }
                    }
                }
            }
            return result;
        }

顺便提下上文中用到的User类如下

public class Users
    {
        /// <summary>
        /// 全局凭证唯一Id
        /// </summary>
        public string OpenID { get; set; }

        /// <summary>
        /// 公众号Id
        /// </summary>
        public string PublicId { get; set; }
        /// <summary>
        /// 用户Id
        /// </summary>
        public string UserID { get; set; }
        /// <summary>
        /// 昵称
        /// </summary>
        public string NickName { get; set; }

        /// <summary>
        /// 性别 1是男 0是女
        /// </summary>
        public int Sex { get; set; }

        /// <summary>
        /// 是否关注 1是关注 
        /// </summary>
        public int Subscribe { get; set; }
        /// <summary>
        /// 国家
        /// </summary>
        public string Country { get; set; }

        /// <summary>
        /// 地区
        /// </summary>
        public string Province { get; set; }
        /// <summary>
        /// 城市
        /// </summary>
        public string City { get; set; }
        /// <summary>
        /// 关注时间
        /// </summary>
        public DateTime CreateDate { get; set; }
        /// <summary>
        /// 用户头像
        /// </summary>
        public string HeadimgUrl { get; set; }
        /// <summary>
        /// 第三方平台Id，可为空
        /// </summary>
        public string UnionID { get; set; }
        /// <summary>
        /// 用户取消关注时间
        /// </summary>
        public DateTime Un_Subscribe_Time { get; set; }
    }

演示效果

数据库中此时是存在10条数据的，当点击关注此公众号的时候，就将此用户的基本信息存入数据库了，数据库刷新后变成11条数据

 

网页授权流程

具体介绍依然可参考官网文档：网页授权

第一步，判断该用户是否获取授权，若没有授权，则跳转至授权页面，若授权，则获取基本信息

核心代码

        /// <summary>
        /// 获取授权用户的基本信息,包括头像，姓名，等等(推荐方法）
        /// </summary>
        /// <param name="accessToken">用户授权之后的accessToken</param>
        /// <param name="openid">用户授权之后的openid</param>
        /// <returns></returns>
        public static ShouQuanWeiXinUserInfo GetShouQuanMessage()
        {
            //先判断是否有获取到用户授权的Code,HttpContext.Current.Session["ShouquanCode"]
            if (HttpContext.Current.Session["ShouquanCode"] == null|| HttpContext.Current.Session["ShouquanCode"].ToString()=="")
            {
                HttpContext.Current.Session["ShouquanCode"] = "123";
                //用户授权的Code
                GetShouQuanCodeUrl(HttpContext.Current.Request.Url.AbsoluteUri);
            }
            else if(HttpContext.Current.Request.QueryString["code"] == null || HttpContext.Current.Request.QueryString["code"] == "")
            {
                //用户授权的Code
                GetShouQuanCodeUrl(HttpContext.Current.Request.Url.AbsoluteUri);
            }
            else
            {
                var model = ShouQuanAccessToken(HttpContext.Current.Request.QueryString["code"]);
                var url =
                    $"https://api.weixin.qq.com/sns/userinfo?access_token={model.access_token}&openid={model.openid}&lang=zh_CN";
                string gethtml = MyHttpHelper.HttpGet(url);
                var ac = JsonHelpers.ToObject<ShouQuanWeiXinUserInfo>(gethtml);
                return ac;
            }
            return null;
        }

其中，用户授权的code方法如下：

 /// <summary>
        /// 重新获取用户授权的Code,可以获取用户的基本信息（头像，姓名，等等）(推荐用的方法）
        /// </summary>
        /// <param name="url">目标Url</param>
        /// <returns></returns>
        public static void GetShouQuanCodeUrl(string url)
        {
            string CodeUrl = "";
            //加密过的url
            string value = HttpUtility.UrlEncode(url);
            //用户授权后的Code
            CodeUrl = $"https://open.weixin.qq.com/connect/oauth2/authorize?appid={Appid}&redirect_uri={value}&response_type=code&scope=snsapi_userinfo&state=STATE#wechat_redirect";
            System.Web.HttpContext.Current.Response.Redirect(CodeUrl);//先跳转到微信的服务器，取得code后会跳回来这页面的

        }

其中ShouQuanAccessToken方法

 /// <summary>
        //用户授权之后，获取授权的Access_Token与基本的Access_Token是不同的(推荐方法）
        /// </summary>
        /// <param name="code">用户授权之后的Code</param>
        /// <returns></returns>
        public static OauthAccessToken ShouQuanAccessToken(string code)
        {
            var url = $"https://api.weixin.qq.com/sns/oauth2/access_token?appid={Appid}&secret={Secret}&code={code}&grant_type=authorization_code";
            string gethtml = MyHttpHelper.HttpGet(url);
            OauthAccessToken ac = new OauthAccessToken();
            ac = JsonHelpers.ToObject<OauthAccessToken>(gethtml);
            return ac;
        }

用户实体

public class OauthAccessToken
        {
            public string access_token { get; set; }
            public string expires_in { get; set; }
            public string refresh_token { get; set; }
            public string openid { get; set; }
            public string scope { get; set; }
        }

其中用到的MyHttpHelper公众类如下

 /// <summary>
    /// Http连接操作帮助类
    /// </summary>
    public class HttpHelpers
    {
        #region 预定义方法或者变更
        //默认的编码
        private Encoding encoding = Encoding.Default;
        //Post数据编码
        private Encoding postencoding = Encoding.Default;
        //HttpWebRequest对象用来发起请求
        private HttpWebRequest request = null;
        //获取影响流的数据对象
        private HttpWebResponse response = null;
        /// <summary>
        /// 根据相传入的数据，得到相应页面数据
        /// </summary>
        /// <param name="item">参数类对象</param>
        /// <returns>返回HttpResult类型</returns>
        public HttpResult GetHtml(HttpItem item)
        {
            //返回参数
            HttpResult result = new HttpResult();
            try
            {
                //准备参数
                SetRequest(item);
            }
            catch (Exception ex)
            {
                return new HttpResult() { Cookie = string.Empty, Header = null, Html = ex.Message, StatusDescription = "配置参数时出错：" + ex.Message };
            }
            try
            {
                #region 得到请求的response
                using (response = (HttpWebResponse)request.GetResponse())
                {
                    result.StatusCode = response.StatusCode;
                    result.StatusDescription = response.StatusDescription;
                    result.Header = response.Headers;
                    if (response.Cookies != null) result.CookieCollection = response.Cookies;
                    if (response.Headers["set-cookie"] != null) result.Cookie = response.Headers["set-cookie"];
                    byte[] ResponseByte = null;
                    using (MemoryStream _stream = new MemoryStream())
                    {
                        //GZIIP处理
                        if (response.ContentEncoding != null && response.ContentEncoding.Equals("gzip", StringComparison.InvariantCultureIgnoreCase))
                        {
                            //开始读取流并设置编码方式
                            new GZipStream(response.GetResponseStream(), CompressionMode.Decompress).CopyTo(_stream, 10240);
                        }
                        else
                        {
                            //开始读取流并设置编码方式
                            response.GetResponseStream().CopyTo(_stream, 10240);
                        }
                        //获取Byte
                        ResponseByte = _stream.ToArray();
                    }
                    if (ResponseByte != null & ResponseByte.Length > 0)
                    {
                        //是否返回Byte类型数据
                        if (item.ResultType == ResultType.Byte) result.ResultByte = ResponseByte;
                        //从这里开始我们要无视编码了
                        if (encoding == null)
                        {
                            Match meta = Regex.Match(Encoding.Default.GetString(ResponseByte), "<meta([^<]*)charset=([^<]*)[\"']", RegexOptions.IgnoreCase);
                            string c = (meta.Groups.Count > 1) ? meta.Groups[2].Value.ToLower().Trim() : string.Empty;
                            if (c.Length > 2)
                            {
                                try
                                {
                                    if (c.IndexOf(" ") > 0) c = c.Substring(0, c.IndexOf(" "));
                                    encoding = Encoding.GetEncoding(c.Replace("\"", "").Replace("'", "").Replace(";", "").Replace("iso-8859-1", "gbk").Trim());
                                }
                                catch
                                {
                                    if (string.IsNullOrEmpty(response.CharacterSet)) encoding = Encoding.UTF8;
                                    else encoding = Encoding.GetEncoding(response.CharacterSet);
                                }
                            }
                            else
                            {
                                if (string.IsNullOrEmpty(response.CharacterSet)) encoding = Encoding.UTF8;
                                else encoding = Encoding.GetEncoding(response.CharacterSet);
                            }
                        }
                        //得到返回的HTML
                        result.Html = encoding.GetString(ResponseByte);
                    }
                    else
                    {
                        //得到返回的HTML
                        //result.Html = "本次请求并未返回任何数据";
                        result.Html = "";
                    }
                }
                #endregion
            }
            catch (WebException ex)
            {
                //这里是在发生异常时返回的错误信息
                response = (HttpWebResponse)ex.Response;
                result.Html = ex.Message;
                if (response != null)
                {
                    result.StatusCode = response.StatusCode;
                    result.StatusDescription = response.StatusDescription;
                }
            }
            catch (Exception ex)
            {
                result.Html = ex.Message;
            }
            if (item.IsToLower) result.Html = result.Html.ToLower();
            return result;
        }

        /// <summary>
        /// 为请求准备参数
        /// </summary>
        ///<param name="item">参数列表</param>
        private void SetRequest(HttpItem item)
        {
            // 验证证书
            SetCer(item);
            //设置Header参数
            if (item.Header != null && item.Header.Count > 0) foreach (string key in item.Header.AllKeys)
                {
                    request.Headers.Add(key, item.Header[key]);
                }

            // 设置代理 
            //SetProxy(item);

            if (item.ProtocolVersion != null) request.ProtocolVersion = item.ProtocolVersion;
            request.ServicePoint.Expect100Continue = item.Expect100Continue;
            //请求方式Get或者Post
            request.Method = item.Method;
            request.Timeout = item.Timeout;
            request.KeepAlive = item.KeepAlive;
            request.ReadWriteTimeout = item.ReadWriteTimeout;
            if (!string.IsNullOrWhiteSpace(item.Host))
            {
                request.Host = item.Host;
            }
            //Accept
            request.Accept = item.Accept;
            //ContentType返回类型
            request.ContentType = item.ContentType;
            //UserAgent客户端的访问类型，包括浏览器版本和操作系统信息
            request.UserAgent = item.UserAgent;
            // 编码
            encoding = item.Encoding;
            //设置安全凭证
            request.Credentials = item.ICredentials;
            //设置Cookie
            SetCookie(item);
            //来源地址
            request.Referer = item.Referer;
            //是否执行跳转功能
            request.AllowAutoRedirect = item.Allowautoredirect;
            //设置Post数据
            SetPostData(item);
            //设置最大连接
            if (item.Connectionlimit > 0) request.ServicePoint.ConnectionLimit = item.Connectionlimit;
        }

        /// <summary>
        /// 设置证书
        /// </summary>
        /// <param name="item"></param>
        private void SetCer(HttpItem item)
        {
            if (!string.IsNullOrWhiteSpace(item.CerPath))
            {
                //这一句一定要写在创建连接的前面。使用回调的方法进行证书验证。
                ServicePointManager.ServerCertificateValidationCallback = new System.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
                //初始化对像，并设置请求的URL地址
                request = (HttpWebRequest)WebRequest.Create(item.URL);
                SetCerList(item);
                //将证书添加到请求里
                request.ClientCertificates.Add(new X509Certificate(item.CerPath));
            }
            else
            {
                //初始化对像，并设置请求的URL地址
                request = (HttpWebRequest)WebRequest.Create(item.URL);
                SetCerList(item);
            }
        }

        /// <summary>
        /// 设置多个证书
        /// </summary>
        /// <param name="item"></param>
        private void SetCerList(HttpItem item)
        {
            if (item.ClentCertificates != null && item.ClentCertificates.Count > 0)
            {
                foreach (X509Certificate c in item.ClentCertificates)
                {
                    request.ClientCertificates.Add(c);
                }
            }
        }

        /// <summary>
        /// 设置Cookie
        /// </summary>
        /// <param name="item">Http参数</param>
        private void SetCookie(HttpItem item)
        {
            if (!string.IsNullOrEmpty(item.Cookie)) request.Headers[HttpRequestHeader.Cookie] = item.Cookie;
            //设置CookieCollection
            if (item.ResultCookieType == ResultCookieType.CookieCollection)
            {
                request.CookieContainer = new CookieContainer();
                if (item.CookieCollection != null && item.CookieCollection.Count > 0)
                    request.CookieContainer.Add(item.CookieCollection);
            }
        }

        /// <summary>
        /// 设置Post数据
        /// </summary>
        /// <param name="item">Http参数</param>
        private void SetPostData(HttpItem item)
        {
            //验证在得到结果时是否有传入数据
            if (request.Method.Trim().ToLower().Contains("post"))
            {
                if (item.PostEncoding != null)
                {
                    postencoding = item.PostEncoding;
                }
                byte[] buffer = null;
                //写入Byte类型
                if (item.PostDataType == PostDataType.Byte && item.PostdataByte != null && item.PostdataByte.Length > 0)
                {
                    //验证在得到结果时是否有传入数据
                    buffer = item.PostdataByte;
                }//写入文件
                else if (item.PostDataType == PostDataType.FilePath && !string.IsNullOrWhiteSpace(item.Postdata))
                {
                    StreamReader r = new StreamReader(item.Postdata, postencoding);
                    buffer = postencoding.GetBytes(r.ReadToEnd());
                    r.Close();
                } //写入字符串
                else if (!string.IsNullOrWhiteSpace(item.Postdata))
                {
                    buffer = postencoding.GetBytes(item.Postdata);
                }
                if (buffer != null)
                {
                    request.ContentLength = buffer.Length;
                    request.GetRequestStream().Write(buffer, 0, buffer.Length);
                }
            }
        }

        /// <summary>
        /// 设置代理
        /// </summary>
        /// <param name="item">参数对象</param>
        private void SetProxy(HttpItem item)
        {
            bool isIeProxy = item.ProxyIp.ToLower().Contains("ieproxy");
            if (!string.IsNullOrWhiteSpace(item.ProxyIp) && !isIeProxy)
            {
                //设置代理服务器
                if (item.ProxyIp.Contains(":"))
                {
                    string[] plist = item.ProxyIp.Split(':');
                    WebProxy myProxy = new WebProxy(plist[0].Trim(), Convert.ToInt32(plist[1].Trim()));
                    //建议连接
                    myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd);
                    //给当前请求对象
                    request.Proxy = myProxy;
                }
                else
                {
                    WebProxy myProxy = new WebProxy(item.ProxyIp, false);
                    //建议连接
                    myProxy.Credentials = new NetworkCredential(item.ProxyUserName, item.ProxyPwd);
                    //给当前请求对象
                    request.Proxy = myProxy;
                }
            }
            else if (isIeProxy)
            {
                //设置为IE代理
            }
            else
            {
                request.Proxy = item.WebProxy;
            }
        }
        /// <summary>
        /// 回调验证证书问题
        /// </summary>
        /// <param name="sender">流对象</param>
        /// <param name="certificate">证书</param>
        /// <param name="chain">X509Chain</param>
        /// <param name="errors">SslPolicyErrors</param>
        /// <returns>bool</returns>
        public bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors) { return true; }
        #endregion
    }

    /// <summary>
    /// Http请求参考类
    /// </summary>
    public class HttpItem
    {
        /// <summary>
        /// 请求URL必须填写
        /// </summary>
        public string URL { get; set; }
        string _Method = "GET";
        /// <summary>
        /// 请求方式默认为GET方式,当为POST方式时必须设置Postdata的值
        /// </summary>
        public string Method
        {
            get { return _Method; }
            set { _Method = value; }
        }
        int _Timeout = 100000;
        /// <summary>
        /// 默认请求超时时间
        /// </summary>
        public int Timeout
        {
            get { return _Timeout; }
            set { _Timeout = value; }
        }
        int _ReadWriteTimeout = 30000;
        /// <summary>
        /// 默认写入Post数据超时间
        /// </summary>
        public int ReadWriteTimeout
        {
            get { return _ReadWriteTimeout; }
            set { _ReadWriteTimeout = value; }
        }
        /// <summary>
        /// 设置Host的标头信息
        /// </summary>
        public string Host { get; set; }
        Boolean _KeepAlive = true;
        /// <summary>
        ///  获取或设置一个值，该值指示是否与 Internet 资源建立持久性连接默认为true。
        /// </summary>
        public Boolean KeepAlive
        {
            get { return _KeepAlive; }
            set { _KeepAlive = value; }
        }
        string _Accept = "text/html, application/xhtml+xml, */*";
        /// <summary>
        /// 请求标头值 默认为text/html, application/xhtml+xml, */*
        /// </summary>
        public string Accept
        {
            get { return _Accept; }
            set { _Accept = value; }
        }
        string _ContentType = "text/html";
        /// <summary>
        /// 请求返回类型默认 text/html
        /// </summary>
        public string ContentType
        {
            get { return _ContentType; }
            set { _ContentType = value; }
        }
        string _UserAgent = "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)";
        /// <summary>
        /// 客户端访问信息默认Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)
        /// </summary>
        public string UserAgent
        {
            get { return _UserAgent; }
            set { _UserAgent = value; }
        }
        /// <summary>
        /// 返回数据编码默认为NUll,可以自动识别,一般为utf-8,gbk,gb2312
        /// </summary>
        public Encoding Encoding { get; set; }
        private PostDataType _PostDataType = PostDataType.String;
        /// <summary>
        /// Post的数据类型
        /// </summary>
        public PostDataType PostDataType
        {
            get { return _PostDataType; }
            set { _PostDataType = value; }
        }
        /// <summary>
        /// Post请求时要发送的字符串Post数据
        /// </summary>
        public string Postdata { get; set; }
        /// <summary>
        /// Post请求时要发送的Byte类型的Post数据
        /// </summary>
        public byte[] PostdataByte { get; set; }
        /// <summary>
        /// Cookie对象集合
        /// </summary>
        public CookieCollection CookieCollection { get; set; }
        /// <summary>
        /// 请求时的Cookie
        /// </summary>
        public string Cookie { get; set; }
        /// <summary>
        /// 来源地址，上次访问地址
        /// </summary>
        public string Referer { get; set; }
        /// <summary>
        /// 证书绝对路径
        /// </summary>
        public string CerPath { get; set; }
        /// <summary>
        /// 设置代理对象，不想使用IE默认配置就设置为Null，而且不要设置ProxyIp
        /// </summary>
        public WebProxy WebProxy { get; set; }
        private Boolean isToLower = false;
        /// <summary>
        /// 是否设置为全文小写，默认为不转化
        /// </summary>
        public Boolean IsToLower
        {
            get { return isToLower; }
            set { isToLower = value; }
        }
        private Boolean allowautoredirect = false;
        /// <summary>
        /// 支持跳转页面，查询结果将是跳转后的页面，默认是不跳转
        /// </summary>
        public Boolean Allowautoredirect
        {
            get { return allowautoredirect; }
            set { allowautoredirect = value; }
        }
        private int connectionlimit = 1024;
        /// <summary>
        /// 最大连接数
        /// </summary>
        public int Connectionlimit
        {
            get { return connectionlimit; }
            set { connectionlimit = value; }
        }
        /// <summary>
        /// 代理Proxy 服务器用户名
        /// </summary>
        public string ProxyUserName { get; set; }
        /// <summary>
        /// 代理 服务器密码
        /// </summary>
        public string ProxyPwd { get; set; }
        /// <summary>
        /// 代理 服务IP,如果要使用IE代理就设置为ieproxy
        /// </summary>
        public string ProxyIp { get; set; }
        private ResultType resulttype = ResultType.String;
        /// <summary>
        /// 设置返回类型String和Byte
        /// </summary>
        public ResultType ResultType
        {
            get { return resulttype; }
            set { resulttype = value; }
        }
        private WebHeaderCollection header = new WebHeaderCollection();
        /// <summary>
        /// header对象
        /// </summary>
        public WebHeaderCollection Header
        {
            get { return header; }
            set { header = value; }
        }
        /// <summary>
        //     获取或设置用于请求的 HTTP 版本。返回结果:用于请求的 HTTP 版本。默认为 System.Net.HttpVersion.Version11。
        /// </summary>
        public Version ProtocolVersion { get; set; }
        private Boolean _expect100continue = true;
        /// <summary>
        ///  获取或设置一个 System.Boolean 值，该值确定是否使用 100-Continue 行为。如果 POST 请求需要 100-Continue 响应，则为 true；否则为 false。默认值为 true。
        /// </summary>
        public Boolean Expect100Continue
        {
            get { return _expect100continue; }
            set { _expect100continue = value; }
        }
        /// <summary>
        /// 设置509证书集合
        /// </summary>
        public X509CertificateCollection ClentCertificates { get; set; }
        /// <summary>
        /// 设置或获取Post参数编码,默认的为Default编码
        /// </summary>
        public Encoding PostEncoding { get; set; }
        private ResultCookieType _ResultCookieType = ResultCookieType.String;
        /// <summary>
        /// Cookie返回类型,默认的是只返回字符串类型
        /// </summary>
        public ResultCookieType ResultCookieType
        {
            get { return _ResultCookieType; }
            set { _ResultCookieType = value; }
        }
        private ICredentials _ICredentials = CredentialCache.DefaultCredentials;
        /// <summary>
        /// 获取或设置请求的身份验证信息。
        /// </summary>
        public ICredentials ICredentials
        {
            get { return _ICredentials; }
            set { _ICredentials = value; }
        }
    }
    /// <summary>
    /// Http返回参数类
    /// </summary>
    public class HttpResult
    {
        /// <summary>
        /// Http请求返回的Cookie
        /// </summary>
        public string Cookie { get; set; }
        /// <summary>
        /// Cookie对象集合
        /// </summary>
        public CookieCollection CookieCollection { get; set; }
        /// <summary>
        /// 返回的String类型数据 只有ResultType.String时才返回数据，其它情况为空
        /// </summary>
        public string Html { get; set; }
        /// <summary>
        /// 返回的Byte数组 只有ResultType.Byte时才返回数据，其它情况为空
        /// </summary>
        public byte[] ResultByte { get; set; }
        /// <summary>
        /// header对象
        /// </summary>
        public WebHeaderCollection Header { get; set; }
        /// <summary>
        /// 返回状态说明
        /// </summary>
        public string StatusDescription { get; set; }
        /// <summary>
        /// 返回状态码,默认为OK
        /// </summary>
        public HttpStatusCode StatusCode { get; set; }
    }
    /// <summary>
    /// 返回类型
    /// </summary>
    public enum ResultType
    {
        /// <summary>
        /// 表示只返回字符串 只有Html有数据
        /// </summary>
        String,
        /// <summary>
        /// 表示返回字符串和字节流 ResultByte和Html都有数据返回
        /// </summary>
        Byte
    }
    /// <summary>
    /// Post的数据格式默认为string
    /// </summary>
    public enum PostDataType
    {
        /// <summary>
        /// 字符串类型，这时编码Encoding可不设置
        /// </summary>
        String,
        /// <summary>
        /// Byte类型，需要设置PostdataByte参数的值编码Encoding可设置为空
        /// </summary>
        Byte,
        /// <summary>
        /// 传文件，Postdata必须设置为文件的绝对路径，必须设置Encoding的值
        /// </summary>
        FilePath
    }
    /// <summary>
    /// Cookie返回类型
    /// </summary>
    public enum ResultCookieType
    {
        /// <summary>
        /// 只返回字符串类型的Cookie
        /// </summary>
        String,
        /// <summary>
        /// CookieCollection格式的Cookie集合同时也返回String类型的cookie
        /// </summary>
        CookieCollection
    }

    /// <summary>HttpHelper的2次封装函数 作者：
    /// </summary>
    public class MyHttpHelper
    {
        #region 公共函数
        /// <summary>返回 HTML 字符串的编码结果</summary>
        /// <param name="str">字符串</param>
        /// <returns>编码结果</returns>
        public static string HtmlEncode(string str)
        {
            if (string.IsNullOrEmpty(str))
            {
                return "";
            }

            return str.Length > 0 ? HttpUtility.HtmlEncode(str) : "";
        }

        /// <summary>返回 HTML 字符串的解码结果</summary>
        /// <param name="str">字符串</param>
        /// <returns>解码结果</returns>
        public static string HtmlDecode(string str)
        {
            if (string.IsNullOrEmpty(str))
            {
                return "";
            }

            return str.Length > 0 ? HttpUtility.HtmlDecode(str) : "";
        }

        /// <summary>
        /// 根据指定的编码对RUl进行解码
        /// </summary>
        /// <param name="str">要解码的字符串</param>
        /// <param name="encoding">要进行解码的编码方式</param>
        /// <returns></returns>
        public static string UrlDecode(string str, Encoding encoding = null)
        {
            if (string.IsNullOrEmpty(str))
            {
                return "";
            }

            if (str.Length == 0)
            {
                return "";
            }

            if (encoding == null)
            {
                return HttpUtility.UrlDecode(str);
            }
            else
            {
                return HttpUtility.UrlDecode(str, encoding);
            }
        }

        /// <summary>根据指定的编码对URL进行编码</summary>
        /// <param name="str">要编码的URL</param>
        /// <param name="encoding">要进行编码的编码方式</param>
        /// <returns></returns>
        public static string UrlEncode(string str, Encoding encoding = null)
        {
            if (string.IsNullOrEmpty(str))
            {
                return "";
            }

            if (str.Length == 0)
            {
                return "";
            }

            if (encoding == null)
            {
                return HttpUtility.UrlEncode(str);
            }
            else
            {
                return HttpUtility.UrlEncode(str, encoding);
            }
        }

        /// <summary>
        /// 根据 charSet 返回 Encoding
        /// </summary>
        /// <param name="charSet">"gb2312" or "utf-8",默认: "" ==  "utf-8"</param>
        /// <returns></returns>
        public static Encoding GetEncoding(string charSet)
        {
            Encoding en = Encoding.Default;

            if (charSet == "gb2312")
            {
                en = Encoding.GetEncoding("gb2312");
            }
            else if (charSet == "utf-8")
            {
                en = Encoding.UTF8;
            }
            return en;
        }


        #endregion

        #region Post

        /// <summary>HTTP Get方式请求数据</summary>
        /// <param name="url">URL</param>
        /// <param name="param">user=123123 & pwd=1231313"</param>
        /// <param name="charSet">"gb2312" or "utf-8",默认: "" ==  "utf-8"</param>
        /// <returns></returns>
        public static string HttpPost(string url, string param, string charSet = "utf-8")
        {
            HttpHelpers http = new HttpHelpers();
            HttpItem item = new HttpItem()
            {
                URL = url,
                Encoding = GetEncoding(charSet),//编码格式（utf-8,gb2312,gbk）     可选项 默认类会自动识别
                Method = "post",//URL     可选项 默认为Get
                Postdata = param
            };


            //得到HTML代码
            HttpResult result = http.GetHtml(item);

            //取出返回的Cookie
            //string cookie = result.Cookie;

            //返回的Html内容
            string html = result.Html;
            if (result.StatusCode == System.Net.HttpStatusCode.OK)
            {
                return html;
            }

            //string statusCodeDescription = result.StatusDescription;
            return "";
        }
        #endregion

        #region Get
        /// <summary>HTTP Get方式请求数据</summary>
        /// <param name="url">URL</param>
        /// <param name="charSet">"gb2312" or "utf-8",默认: "" ==  "utf-8"</param>
        /// <returns></returns>
        public static string HttpGet(string url, string charSet = "utf-8")
        {
            HttpHelpers http = new HttpHelpers();
            HttpItem item = new HttpItem()
            {
                URL = url,
                Encoding = GetEncoding(charSet),
                Method = "get"
            };


            //得到HTML代码
            HttpResult result = http.GetHtml(item);

            //取出返回的Cookie
            //string cookie = result.Cookie;

            //返回的Html内容
            string html = result.Html;
            if (result.StatusCode == System.Net.HttpStatusCode.OK)
            {
                return html;
            }
            //string statusCodeDescription = result.StatusDescription;
            return "";
        }
        /// <summary>POST客服消息/summary>
        /// <param name="url">URL</param>
        /// <param name="postData">内容</param>
        /// <returns>消息状态</returns>
        public static string GetPage(string posturl, string postData)
        {
            Stream outstream = null;
            Stream instream = null;
            StreamReader sr = null;
            HttpWebResponse response = null;
            HttpWebRequest request = null;
            Encoding encoding = Encoding.UTF8;
            byte[] data = encoding.GetBytes(postData);
            // 准备请求...  
            try
            {
                // 设置参数  
                request = WebRequest.Create(posturl) as HttpWebRequest;
                CookieContainer cookieContainer = new CookieContainer();
                request.CookieContainer = cookieContainer;
                request.AllowAutoRedirect = true;
                request.Method = "POST";
                request.ContentType = "application/x-www-form-urlencoded";
                request.ContentLength = data.Length;
                outstream = request.GetRequestStream();
                outstream.Write(data, 0, data.Length);
                outstream.Close();
                //发送请求并获取相应回应数据  
                response = request.GetResponse() as HttpWebResponse;
                //直到request.GetResponse()程序才开始向目标网页发送Post请求  
                instream = response.GetResponseStream();
                sr = new StreamReader(instream, encoding);
                //返回结果网页（html）代码  
                string content = sr.ReadToEnd();
                string err = string.Empty;
                return content;
            }
            catch (Exception ex)
            {
                string err = ex.Message;
                return err;
            }
        }
        #endregion

    }

封装的JsonHelpers类如下

 #region 通用

        /// <summary>检查字符串是否json格式</summary>
        /// <param name="jText"></param>
        /// <returns></returns>
        public static bool IsJson(string jText)
        {
            if (string.IsNullOrEmpty(jText) || jText.Length < 3)
            {
                return false;
            }

            if (jText.Substring(0, 2) == "{\"" || jText.Substring(0, 3) == "[{\"")
            {
                return true;
            }
            return false;
        }

        /// <summary>检查字符串是否json格式数组</summary>
        /// <param name="jText"></param>
        /// <returns></returns>
        public static bool IsJsonRs(string jText)
        {
            if (string.IsNullOrEmpty(jText) || jText.Length < 3)
            {
                return false;
            }

            if (jText.Substring(0, 3) == "[{\"")
            {
                return true;
            }
            return false;
        }

        /// <summary>格式化 json</summary>
        /// <param name="jText"></param>
        /// <returns></returns>
        public static string Fmt_Null(string jText)
        {
            return StringHelper.ReplaceString(jText, ":null,", ":\"\",", true);
        }

        /// <summary>格式化 json ，删除左右二边的[]</summary>
        /// <param name="jText"></param>
        /// <returns></returns>
        public static string Fmt_Rs(string jText)
        {
            jText = jText.Trim();
            jText = jText.Trim('[');
            jText = jText.Trim(']');
            return jText;
        }

        #endregion

        #region Json序列化

        /// <summary>序列化</summary>
        /// <param name="obj">object </param>
        /// <returns></returns>
        public static string ToJson(object obj)
        {
            var idtc = new Newtonsoft.Json.Converters.IsoDateTimeConverter { DateTimeFormat = "yyyy-MM-dd hh:mm:ss" };

            return JsonConvert.SerializeObject(obj, idtc);
        }


        /// <summary>序列化--sql</summary>
        /// <param name="dt">DataTable</param>
        /// <returns></returns>   
        public static string ToJson_FromSQL(DataTable dt)
        {
            string ss = ToJson(dt);
            dt.Dispose();
            return ss;
        }

        #endregion

        #region Json反序列化

        /// <summary>反序列化</summary>
        /// <param name="jText"></param>
        /// <returns></returns>      
        public static DataTable ToDataTable(string jText)
        {
            if (string.IsNullOrEmpty(jText))
            {
                return null;
            }
            else
            {
                try
                {
                    return JsonConvert.DeserializeObject<DataTable>(jText);
                }
                catch
                {
                    return null;
                }
            }
        }

        /// <summary>反序列化</summary>
        /// <typeparam name="T">类型</typeparam>
        /// <param name="jText">json字符串</param>
        /// <returns>类型数据</returns>
        public static T ToObject<T>(string jText)
        {
            return (T)JsonConvert.DeserializeObject(jText, typeof(T));
        }

        #endregion

其中，如果是VS2015以下的，可以将url字符串改成string.format("")方式

调用取值的方式

效果展示

点击公众号链接效果如下：

 

未完待续，持续填坑中。。。