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本文通过实现的微信开放平台之网站授权微信登录功能,需要的小伙伴一起看看吧  

1 微信开放平台:https://open.weixin.qq/

2 微信官方教程:https://open.weixin.qq/cgi-bin/showdocument?action=dir_list&t=resource/res_list&verify=1&id=open1419316505&token=&lang=zh_CN

3.pc页面显示

4. 通过官方提供的文档,我们可以看出一共分4个步骤

第一步:请求CODE

第二步:通过code获取access_token

第三步:通过access_token调用接口

第4步:获取用户个人信息(UnionID机制)

api:核心代码

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 public class weixin_helper   {    public weixin_helper()    {    }    /// <summary>    /// 根据AppID和AppSecret获得access token(默认过期时间为2小时)    /// </summary>    /// <returns>Dictionary</returns>    public static Dictionary< string , object > get_access_token()    {     //获得配置信息     oauth_config config = oauth_helper.get_config(2);     string send_url = "https://api.weixin.qq/cgi-bin/token?grant_type=client_credential&appid=" +          config.oauth_app_id + "&secret=" + config.oauth_app_key + "" ;     //发送并接受返回值     string result = Utils.HttpGet(send_url);     if (result.Contains( "errmsg" ))     {      return null ;     }     try     {      Dictionary< string , object > dic = JsonConvert.DeserializeObject<Dictionary< string , object >>(result);      return dic;     }     catch     {      return null ;     }    } /// <summary>    /// 取得临时的Access Token(默认过期时间为2小时)    /// </summary>    /// <param name="code">临时Authorization Code</param>    /// <param name="state">防止CSRF攻击,成功授权后回调时会原样带回</param>    /// <returns>Dictionary</returns>    public static Dictionary< string , object > get_access_token( string code, string state)    {     //获得配置信息     oauth_config config = oauth_helper.get_config(2);     string send_url = "https://api.weixin.qq/sns/oauth2/access_token?appid=" +          config.oauth_app_id + "&secret=" + config.oauth_app_key + "&code=" +code+ "&grant_type=authorization_code" ;     //发送并接受返回值     string result = Utils.HttpGet(send_url);     if (result.Contains( "errmsg" ))     {      return null ;     }     try     {      Dictionary< string , object > dic = JsonConvert.DeserializeObject<Dictionary< string , object >>(result);      return dic;     }     catch     {      return null ;     }    }    /// <summary>    /// 根据access_token判断access_token是否过期    /// </summary>    /// <param name="access_token"></param>    /// <returns>true表示未失效</returns>    public static bool check_access_token( string access_token)    {     //获得配置信息     oauth_config config = oauth_helper.get_config(2);     string send_url = "https://api.weixin.qq/sns/auth?access_token=" + access_token + "&openid=" + config.oauth_app_id;     //发送并接受返回值     string result = Utils.HttpGet(send_url);     try     {      Dictionary< string , object > dic = JsonConvert.DeserializeObject<Dictionary< string , object >>(result);      if (dic.ContainsKey( "errmsg" ))      {       if (dic[ "errmsg" ].ToString()== "ok" )       {        return true ;       }       else       {        return false ;       }      }      return false ;     }     catch     {      return false ;     }    }    /// <summary>    /// 若fresh_token已过期则根据refresh_token取得新的refresh_token    /// </summary>    /// <param name="refresh_token">refresh_token</param>    /// <returns>Dictionary</returns>    public static Dictionary< string , object > get_refresh_token( string refresh_token)    {     //获得配置信息     oauth_config config = oauth_helper.get_config(2);     string send_url =      "https://api.weixin.qq/sns/oauth2/refresh_token?appid=" +          config.oauth_app_id + "&grant_type=refresh_token&refresh_token=" + refresh_token;     //发送并接受返回值     string result = Utils.HttpGet(send_url);     if (result.Contains( "errmsg" ))     {      return null ;     }     try     {      Dictionary< string , object > dic = JsonConvert.DeserializeObject<Dictionary< string , object >>(result);      return dic;     }     catch     {      return null ;     }    }    /// <summary>    /// 获取登录用户自己的基本资料    /// </summary>    /// <param name="access_token">临时的Access Token</param>    /// <param name="open_id">用户openid</param>    /// <returns>Dictionary</returns>    public static Dictionary< string , object > get_user_info( string access_token, string open_id)    {     //获得配置信息     oauth_config config = oauth_helper.get_config(2);     //发送并接受返回值     string send_url = "https://api.weixin.qq/sns/userinfo?access_token=" +access_token+ "&openid=" +open_id;     //发送并接受返回值     string result = Utils.HttpGet(send_url);     if (result.Contains( "errmsg" ))     {      return null ;     }     //反序列化JSON     Dictionary< string , object > dic = JsonHelper.DataRowFromJSON(result);     return dic;    }   }

控制器的核心代码:

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 #region 微信登录    /// <summary>    /// 微信登录    /// </summary>    public ActionResult WeChat()    {     //获得配置信息     oauth_config config = oauth_helper.get_config(2); //主键id     if (config == null )     {      return Content( "出错了,您尚未配置微信相关的API信息!" );     }     string state = Guid.NewGuid().ToString().Replace( "-" , "" );     Session[ "oauth_state" ] = state;     string send_url =      "https://open.weixin.qq/connect/qrconnect?appid=" + config.oauth_app_id +          "&redirect_uri=" + Utils.UrlEncode(config.return_uri.ToLower()) +          "&response_type=code&scope=snsapi_login&state=" + state +          "#wechat_redirect" ;     //开始发送     return Redirect(send_url); //跳转到微信自己 指定的关联登陆页面    }    /// <summary>    /// 微信登录返回action    /// </summary>    public ActionResult WeChatReturnUrl( string state, string code)    {     //取得返回参数     string access_token = string .Empty;     string expires_in = string .Empty;     string client_id = string .Empty;     string openid = string .Empty;     string refresh_token = string .Empty;     if (Session[ "oauth_state" ] == null || Session[ "oauth_state" ].ToString() == "" ||      state != Session[ "oauth_state" ].ToString() || string .IsNullOrEmpty(code)) //若返回参数中未包含code或者state没有通过验证则提示出错     {      return Content( "出错啦,state未初始化!" );     }     //第一步:通过code来获取Access Token以及openid     Dictionary< string , object > dic1 = weixin_helper.get_access_token(code, state);     if (dic1 == null || !dic1.ContainsKey( "access_token" ))     {      return Content( "错误代码:,无法获取Access Token,请检查App Key是否正确!" );     }     if (dic1 == null || !dic1.ContainsKey( "openid" ))     {      if (dic1.ContainsKey( "errmsg" ))      {       return Content( "errcode:" + dic1[ "errcode" ] + ",errmsg:" + dic1[ "errmsg" ]);      }      else      {       return Content( "出错啦,无法获取用户授权Openid!" );      }     }     access_token = dic1[ "access_token" ].ToString(); //获取access_token     expires_in = dic1[ "expires_in" ].ToString(); //获取过期时间     refresh_token = dic1[ "refresh_token" ].ToString(); //获取用于重新刷新access_token的凭证     openid = dic1[ "openid" ].ToString(); //用户唯一标示openid     //储存获取数据用到的信息     Session[ "oauth_name" ] = "webchat" ;     Session[ "oauth_access_token" ] = access_token;     Session[ "oauth_openid" ] = openid;     Session[ "oauth_refresh_token" ] = refresh_token;     #region todo 将获取到的用户信息保存到数据库中     #endregion     //第二步:通过Access Token以及openid来获取用户的基本信息     //Dictionary<string, object> dic2 = weixin_helper.get_user_info(access_token,openid);     //第三步:跳转到指定页面     return Content(WeChatResultJson());    }    /// <summary>    /// 微信登录返回action, 处理用户信息    /// </summary>    public string WeChatResultJson()    {     string oauth_access_token = string .Empty;     string oauth_openid = string .Empty;     string oauth_name = string .Empty;     string oauth_refresh_token = string .Empty;     if (Session[ "oauth_name" ] == null || Session[ "oauth_access_token" ] == null ||      Session[ "oauth_openid" ] == null )     {      return "{\"ret\":\"1\", \"msg\":\"出错啦,Access Token已过期或不存在!\"}" ;     }     oauth_name = Session[ "oauth_name" ].ToString();     oauth_access_token = Session[ "oauth_access_token" ].ToString();     oauth_openid = Session[ "oauth_openid" ].ToString();     oauth_refresh_token = Session[ "oauth_refresh_token" ].ToString();     if (!weixin_helper.check_access_token(oauth_access_token)) //调用access_token前需判断是否过期     {      Dictionary< string , object > dic1 = weixin_helper.get_refresh_token(oauth_refresh_token); //如果已过期则重新换取新的access_token      if (dic1 == null || !dic1.ContainsKey( "access_token" ))      {       return "{\"openid\":\"0\", \"msg\":\"出错啦,无法获取access_token!\"}" ;      }      oauth_access_token = dic1[ "access_token" ].ToString();     }     Dictionary< string , object > dic = weixin_helper.get_user_info(oauth_access_token, oauth_openid);     if (dic == null )     {      return "{\"openid\":\"0\", \"msg\":\"出错啦,无法获取授权用户信息!\"}" ;     }     try     {      StringBuilder str = new StringBuilder();      str.Append( "{" );      str.Append( "\"openid\": \"" + dic[ "openid" ].ToString() + "\", " );      str.Append( "\"nickname\": \"" + dic[ "nickname" ].ToString() + "\", " );      str.Append( "\"sex\": \"" + dic[ "sex" ].ToString() + "\", " );      str.Append( "\"province\": \"" + dic[ "province" ].ToString() + "\", " );      str.Append( "\"city\": \"" + dic[ "city" ].ToString() + "\", " );      str.Append( "\"country\": \"" + dic[ "country" ].ToString() + "\", " );      str.Append( "\"headimgurl\": \"" + dic[ "headimgurl" ].ToString() + "\", " );      str.Append( "\"privilege\": \"" + dic[ "privilege" ].ToString() + "\", " );      str.Append( "\"unionid\": \"" + dic[ "unionid" ].ToString() + "\"" );      str.Append( "\"oauth_name\": \"" + oauth_name + "\"" );      str.Append( "\"oauth_access_token\": \"" + oauth_access_token + "\"" );      str.Append( "\"oauth_openid\": \"" + oauth_openid + "\"" );      str.Append( "}" );      return str.ToString();     }     catch     {      return "{\"ret\":\"0\", \"msg\":\"出错啦,无法获取授权用户信息!\"}" ;     }    }    #endregion

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