1 微信开放平台：https://open.weixin.qq.com/ 2 微信官方教程：https://open.weixin.qq.com/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public class weixin_helper{public weixin_helper(){}/// /// 根据AppID和AppSecret获得access token(默认过期时间为2小时)/// /// Dictionarypublic static Dictionary get_access_token(){//获得配置信息oauth_config config = oauth_helper.get_config(2);string send_url = "https://api.weixin.qq.com/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 dic = JsonConvert.DeserializeObject>(result);return dic;}catch{return null;}} /// /// 取得临时的Access Token(默认过期时间为2小时)/// /// 临时Authorization Code/// 防止CSRF攻击，成功授权后回调时会原样带回/// Dictionarypublic static Dictionary 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.com/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 dic = JsonConvert.DeserializeObject>(result);return dic;}catch{return null;}}/// /// 根据access_token判断access_token是否过期/// /// /// true表示未失效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.com/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 dic = JsonConvert.DeserializeObject>(result);if (dic.ContainsKey("errmsg")){if (dic["errmsg"].ToString()=="ok"){return true;}else{return false;}}return false;}catch{return false;}}/// /// 若fresh_token已过期则根据refresh_token取得新的refresh_token/// /// refresh_token/// Dictionarypublic static Dictionary 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.com/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 dic = JsonConvert.DeserializeObject>(result);return dic;}catch{return null;}}/// /// 获取登录用户自己的基本资料/// /// 临时的Access Token/// 用户openid/// Dictionarypublic static Dictionary 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.com/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 dic = JsonHelper.DataRowFromJSON(result);return dic;}}
控制器的核心代码：
#region 微信登录/// /// 微信登录/// 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.com/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}/// /// 微信登录返回action/// 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 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 dic2 = weixin_helper.get_user_info(access_token,openid);//第三步：跳转到指定页面return Content(WeChatResultJson());}/// /// 微信登录返回action, 处理用户信息/// 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 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 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您可能感兴趣的文章:微信公众平台网页授权获取用户基本信息中授权回调域名设置的变动解析微信JS-SDK配置授权，实现分享接口微信开发 微信授权详解微信公众号-获取用户信息（网页授权获取）实现步骤php版微信公众平台之微信网页登陆授权示例MVC微信网页授权获取用户OpenId微信网页授权(OAuth2.0) PHP 源码简单实现ASP.NET实现QQ、微信、新浪微博OAuth2.0授权登录PHP实现微信网页授权开发教程微信开发之网页授权获取用户信息(二) weiphp微信公众平台授权设置解决微信授权回调页面域名只能设置一个的问题
