WinForm微信扫码登录

源码还需优化，不喜勿喷。

微信官方文档 : https://developers.weixin.qq.com/doc/oplatform/Website_App/WeChat_Login/Wechat_Login.html

前期准备：

1.微信开放平台开发者资质认证  https://open.weixin.qq.com/   费用300 大概1-2天时间

 

2.创建网站应用，需要已备案域名、logo等资料 大概1-2天

 

3.通过以后获取AppID、AppSecret

 

 

  

 

 

 

 winform 窗体 控件 ： webBrowser（加载微信接口,样式太难调了，设置隐藏即可，用pictureBox盖住就好） 、pictureBox（zhexiubu 加载二维码图片）

回调函数需格式化一下urlencode，微信要求的 地址：   >//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;