WinForm微信扫码登录

//Form窗体加载
private void LoginForm_Load(object sender, EventArgs e) { webBrowser1.Navigate("https://open.weixin.qq.com/connect/qrconnect?appid=微信开放平台申请的appid&redirect_uri=授权回调域&response_type=code&scope=snsapi_login&state=200");  }

//Form窗体

ArrayList addressList = new ArrayList();         string url = "";         private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)         {             if (url != "")             {                 string tempCode = "";                  if (addressList.Count == 1)                 {                     foreach (HtmlElement he in webBrowser1.Document.GetElementsByTagName("img"))                     {                         string str = he.GetAttribute("className");                         if (str == "qrcode lightBorder")                         {                             pictureBox1.ImageLocation = he.GetAttribute("src"); //获取微信生成的二维码图片,那个网页中只有两个图片,且二维码是第二张图片.                          }                     }                     return;                 }                 else if (addressList.Count > 1)                 {                     tempCode = addressList[1].ToString();                     addressList = new ArrayList();                 }                  //微信最终获得的code                 string code = "";                 if (tempCode.Contains("code"))                 {                     int iStart = tempCode.IndexOf("=");                     int iEnd = tempCode.IndexOf('&', iStart);                     if (iEnd < 0)                     {                         iEnd = tempCode.Length - iStart;                     }                     else                     {                         iEnd -= iStart;                     }                     code = tempCode.Substring(iStart + 1, iEnd - 1);                 }                 else                 {                     return;                 }                   if (string.IsNullOrEmpty(code))                     return;                 OAuth_Token token = new OAuth_Token();                 OAuth_Token Model = token.Get_token(code);  //获取access_token                 OAuthUser OAuthUser_Model = token.Get_UserInfo(Model.access_token, Model.openid);//获取用户信息                      if (OAuthUser_Model.openid != null)                 {
　　　　　　　　　　　　//通过openID 查询用户表 新增 修改 （openID是用户微信唯一ID 可做关联）                     Dao dao = new Dao();                     string res = dao.AddWeChatUser(OAuthUser_Model);                     if (res == "1")                     {                         //跳转主页                     }                     else if (res == "2")                     {                        //跳转注册页面完善信息                     }                 }             }         }

//Form窗体

private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)         {             url = e.Url.ToString();             //微信每次跳转的页面放到list中，第一个是包含code的网址             addressList.Add(url);         }

using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Runtime.Serialization.Json; using System.Text; using System.Threading.Tasks;  namespace XXXX {     public class JsonHelper     {         public static T ParseFromJson<T>(string szJson)         {             T obj = Activator.CreateInstance<T>();             using (MemoryStream ms =             new MemoryStream(Encoding.UTF8.GetBytes(szJson)))             {                 DataContractJsonSerializer serializer =                 new DataContractJsonSerializer(obj.GetType());                 return (T)serializer.ReadObject(ms);             }         }     } }

using System.Net; using System.Text;  namespace XXXXX {     public class OAuth_Token     {         public OAuth_Token()         {              //             //TODO: 在此处添加构造函数逻辑             //         }         //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>           /// 生成Json格式           /// </summary>           /// <typeparam name="T"></typeparam>           /// <param name="obj"></param>           /// <returns></returns>           public 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;         }         /// <summary>           /// json转实体           /// </summary>           /// <typeparam name="T"></typeparam>           /// <param name="szJson"></param>           /// <returns></returns>           public OAuth_Token Get_token(string Code)         {             string appid = "申请的appid";             string appsecret = "申请的appsecret";             //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;         }         /// <summary>           /// 通过access_token和openid获取用户信息           /// </summary>           /// <returns></returns>           public OAuthUser Get_UserInfo(string access_token, string openid)         {             //获取微信回传的openid、access token             string Str = GetJson("https://api.weixin.qq.com/sns/userinfo?access_token=" + access_token + "&openid=" + openid + "&lang=zh_CN");             //微信回传的数据为Json格式，将Json格式转化成对象             OAuthUser userinfo = JsonHelper.ParseFromJson<OAuthUser>(Str);             return userinfo;         }     } }

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;  namespace XXXXX {     /// <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;         private DateTime _CreateDateTime;          #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，最后一个数值代表正方形头像大小（有0、46、64、96、132数值可选，0代表640*640正方形头像），用户没有头像时该项为空         /// </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; }         }         public DateTime CreateDateTime         {             set { _CreateDateTime = value; }             get { return _CreateDateTime; }         }         #endregion     } }