微信客户端登陆

界面:

<Window x:Class="WpfApp1.weixin"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:WpfApp1"
        mc:Ignorable="d"
        Title="weixin" Height="450" Width="800">
    <Grid>
        <WebBrowser x:Name="weixinbrowser" ScrollViewer.VerticalScrollBarVisibility ="Disabled"  UseLayoutRounding="False" Grid.ColumnSpan="3" Navigating="WeChatWebBrowser_Navigating" LoadCompleted="WeChatWebBrowser_LoadCompleted" Loaded="WeChatWebBrowser_Loaded" Navigated="WeChatWebBrowser_Navigated"/>
    </Grid>
</Window>

后台:

namespace WpfApp1
{
    /// <summary>
    /// weixin.xaml 的交互逻辑
    /// </summary>
    public partial class weixin : Window
    {
        public weixin()
        {
            InitializeComponent();
            weixinbrowser.Navigate(new Uri("xxx"));
        }

        #region 属性
        public string appid = "xxx";  //公众微信平台下可以找到
        public string appsecret = "xxx";  //公众微信平台下可以找到

        #endregion

        //根据appid，secret，code获取微信openid、access token信息
        protected OAuth_Token Get_token(string Code)
        {
            //获取微信回传的openid、access token
            string Str = GetJson("https://api.weixin.qq.com/sns/oauth2/access_token?appid=" + appid + "&secret=" + appsecret + "&code=" + Code + "&grant_type=authorization_code");
            //微信回传的数据为Json格式，将Json格式转化成对象
            OAuth_Token Oauth_Token_Model = JSONHelper.ParseFromJson<OAuth_Token>(Str);
            return Oauth_Token_Model;
        }

        //刷新Token(好像这个刷新Token没有实际作用)
        protected OAuth_Token refresh_token(string REFRESH_TOKEN)
        {
            string Str = GetJson("https://api.weixin.qq.com/sns/oauth2/refresh_token?appid=" + appid + "&grant_type=refresh_token&refresh_token=" + REFRESH_TOKEN);
            OAuth_Token Oauth_Token_Model = JSONHelper.ParseFromJson<OAuth_Token>(Str);
            return Oauth_Token_Model;
        }

        //根据openid，access token获得用户信息
        protected OAuthUser Get_UserInfo(string REFRESH_TOKEN, string OPENID)
        {
            string Str = GetJson("https://api.weixin.qq.com/sns/userinfo?access_token=" + REFRESH_TOKEN + "&openid=" + OPENID);
            OAuthUser OAuthUser_Model = JSONHelper.ParseFromJson<OAuthUser>(Str);
            return OAuthUser_Model;
        }

        //访问微信url并返回微信信息
        protected string GetJson(string url)
        {
            WebClient wc = new WebClient();
            wc.Credentials = CredentialCache.DefaultCredentials;
            wc.Encoding = Encoding.UTF8;
            string returnText = wc.DownloadString(url);

            if (returnText.Contains("errcode"))
            {
                //可能发生错误
            }
            return returnText;
        }

        private void WeChatWebBrowser_Navigating(object sender, System.Windows.Navigation.NavigatingCancelEventArgs e)
        {
            SetWebBrowserSilent(sender as WebBrowser, true);
            string url = e.Uri.ToString();
            if (url.Contains("code"))
            {
                string code = "";
                int iStart = url.IndexOf("=");
                int iEnd = url.IndexOf('&', iStart);
                if (iEnd < 0)
                {
                    iEnd = url.Length - iStart;
                }
                else
                {
                    iEnd -= iStart;
                }
                code = url.Substring(iStart + 1, iEnd - 1);

                OAuth_Token model = Get_token(code);  //获取access_token
                if (string.IsNullOrEmpty(model.access_token) || string.IsNullOrEmpty(model.openid))
                {
                    return;
                }

                OAuthUser OAuthUser_Model = Get_UserInfo(model.access_token, model.openid);//获取用户信息
                return;
            }

            //不提示脚本错误
            SetWebBrowserSilent(sender as WebBrowser, true);

        }
        private void WeChatWebBrowser_LoadCompleted(object sender, System.Windows.Navigation.NavigationEventArgs e)
        {
            HTMLDocument dom = (mshtml.HTMLDocument)weixinbrowser.Document; //定义HTML
            dom.documentElement.style.overflow = "hidden";    //隐藏浏览器的滚动条
            dom.body.setAttribute("scroll", "no");            //禁用浏览器的滚动条
            SetWebBrowserSilent(sender as WebBrowser, true);
        }

        private void WeChatWebBrowser_Loaded(object sender, RoutedEventArgs e)
        {

        }

        private void WeChatWebBrowser_Navigated(object sender, System.Windows.Navigation.NavigationEventArgs e)
        {
        }
        /// <summary>
        /// 设置浏览器静默，不弹错误提示框
        /// </summary>
        /// <param name="webBrowser">要设置的WebBrowser控件浏览器</param>
        /// <param name="silent">是否静默</param>
        private void SetWebBrowserSilent(WebBrowser webBrowser, bool silent)
        {
            FieldInfo fi = typeof(WebBrowser).GetField("_axIWebBrowser2", BindingFlags.Instance | BindingFlags.NonPublic);
            if (fi != null)
            {
                object browser = fi.GetValue(webBrowser);
                if (browser != null)
                    browser.GetType().InvokeMember("Silent", BindingFlags.SetProperty, null, browser, new object[] { silent });
            }
        }

        /// <summary>
        /// TitleBar_MouseDown - Drag if single-click, resize if double-click
        /// </summary>
        private void TitleBar_MouseDown(object sender, MouseButtonEventArgs e)
        {
            if (e.ChangedButton == MouseButton.Left)
                if (e.ClickCount == 2)
                {
                    //AdjustWindowSize();
                }
                else
                {
                    this.DragMove();
                }
        }
        private void CloseButton_Click(object sender, RoutedEventArgs e)
        {
            this.Close();
        }
    }


    /// <summary>
    /// 微信Access_token类
    /// </summary>
    public class OAuth_Token
    {
        //access_token    网页授权接口调用凭证,注意：此access_token与基础支持的access_token不同
        //expires_in    access_token接口调用凭证超时时间，单位（秒）
        //refresh_token    用户刷新access_token
        //openid    用户唯一标识，请注意，在未关注公众号时，用户访问公众号的网页，也会产生一个用户和公众号唯一的OpenID
        //scope    用户授权的作用域，使用逗号（,）分隔
        public string _access_token;
        public string _expires_in;
        public string _refresh_token;
        public string _openid;
        public string _scope;
        public string access_token
        {
            set { _access_token = value; }
            get { return _access_token; }
        }
        public string expires_in
        {
            set { _expires_in = value; }
            get { return _expires_in; }
        }

        public string refresh_token
        {
            set { _refresh_token = value; }
            get { return _refresh_token; }
        }
        public string openid
        {
            set { _openid = value; }
            get { return _openid; }
        }
        public string scope
        {
            set { _scope = value; }
            get { return _scope; }
        }

    }

    /// <summary>
    /// 微信用户信息类
    /// </summary>
    public class OAuthUser
    {
        public OAuthUser()
        { }
        #region 数据库字段
        private string _openID;
        private string _searchText;
        private string _nickname;
        private string _sex;
        private string _province;
        private string _city;
        private string _country;
        private string _headimgUrl;
        private string _privilege;
        private string _unionid;

        #endregion

        #region 字段属性
        /// <summary>
        /// 用户的唯一标识
        /// </summary>
        public string openid
        {
            set { _openID = value; }
            get { return _openID; }
        }
        /// <summary>
        /// 
        /// </summary>
        public string SearchText
        {
            set { _searchText = value; }
            get { return _searchText; }
        }
        /// <summary>
        /// 用户昵称 
        /// </summary>
        public string nickname
        {
            set { _nickname = value; }
            get { return _nickname; }
        }
        /// <summary>
        /// 用户的性别，值为1时是男性，值为2时是女性，值为0时是未知 
        /// </summary>
        public string sex
        {
            set { _sex = value; }
            get { return _sex; }
        }
        /// <summary>
        /// 用户个人资料填写的省份
        /// </summary>
        public string province
        {
            set { _province = value; }
            get { return _province; }
        }
        /// <summary>
        /// 普通用户个人资料填写的城市 
        /// </summary>
        public string city
        {
            set { _city = value; }
            get { return _city; }
        }
        /// <summary>
        /// 国家，如中国为CN 
        /// </summary>
        public string country
        {
            set { _country = value; }
            get { return _country; }
        }
        /// <summary>
        /// 用户头像 
        /// </summary>
        public string headimgurl
        {
            set { _headimgUrl = value; }
            get { return _headimgUrl; }
        }
        /// <summary>
        /// 用户特权信息，json 数组，如微信沃卡用户为（chinaunicom）其实这个格式称不上JSON，只是个单纯数组
        /// </summary>
        public string privilege
        {
            set { _privilege = value; }
            get { return _privilege; }
        }
        public string unionid
        {
            set { _unionid = value; }
            get { return _unionid; }
        }
        #endregion
    }
}