public class weixin_helper {  public weixin_helper()  {  }  /// <summary>  /// 根據(jù)AppID和AppSecret獲得access token(默認(rèn)過期時間為2小時)  /// </summary>  /// <returns>Dictionary</returns>  public static Dictionary<string, object> get_access_token()  {   //獲得配置信息   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 + "";   //發(fā)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>  /// 取得臨時的Access Token(默認(rèn)過期時間為2小時)  /// </summary>  /// <param name="code">臨時Authorization Code</param>  /// <param name="state">防止CSRF攻擊，成功授權(quán)后回調(diào)時會原樣帶回</param>  /// <returns>Dictionary</returns>  public static Dictionary<string, object> get_access_token(string code, string state)  {   //獲得配置信息   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";   //發(fā)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>  /// 根據(jù)access_token判斷access_token是否過期  /// </summary>  /// <param name="access_token"></param>  /// <returns>true表示未失效</returns>  public static bool check_access_token(string access_token)  {   //獲得配置信息   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;   //發(fā)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已過期則根據(jù)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)  {   //獲得配置信息   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;   //發(fā)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>  /// 獲取登錄用戶自己的基本資料  /// </summary>  /// <param name="access_token">臨時的Access Token</param>  /// <param name="open_id">用戶openid</param>  /// <returns>Dictionary</returns>  public static Dictionary<string, object> get_user_info(string access_token, string open_id)  {   //獲得配置信息   oauth_config config = oauth_helper.get_config(2);   //發(fā)送并接受返回值    string send_url = "https://api.weixin.qq.com/sns/userinfo?access_token="+access_token+"&openid="+open_id;   //發(fā)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;  } }

#region 微信登錄  /// <summary>  /// 微信登錄  /// </summary>  public ActionResult WeChat()  {   //獲得配置信息   oauth_config config = oauth_helper.get_config(2); //主鍵id   if (config == null)   {    return Content("出錯了，您尚未配置微信相關(guān)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";   //開始發(fā)送   return Redirect(send_url); //跳轉(zhuǎn)到微信自己 指定的關(guān)聯(lián)登陸頁面  }  /// <summary>  /// 微信登錄返回action  /// </summary>  public ActionResult WeChatReturnUrl(string state, string code)  {   //取得返回參數(shù)   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))//若返回參數(shù)中未包含code或者state沒有通過驗證則提示出錯   {    return Content("出錯啦，state未初始化！");   }   //第一步：通過code來獲取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("錯誤代碼：，無法獲取Access Token，請檢查App Key是否正確！");   }   if (dic1 == null || !dic1.ContainsKey("openid"))   {    if (dic1.ContainsKey("errmsg"))    {     return Content("errcode：" + dic1["errcode"] + ",errmsg：" + dic1["errmsg"]);    }    else    {     return Content("出錯啦，無法獲取用戶授權(quán)Openid！");    }   }   access_token = dic1["access_token"].ToString();//獲取access_token   expires_in = dic1["expires_in"].ToString();//獲取過期時間   refresh_token = dic1["refresh_token"].ToString();//獲取用于重新刷新access_token的憑證   openid = dic1["openid"].ToString();//用戶唯一標(biāo)示openid   //儲存獲取數(shù)據(jù)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 將獲取到的用戶信息保存到數(shù)據(jù)庫中   #endregion   //第二步：通過Access Token以及openid來獲取用戶的基本信息   //Dictionary<string, object> dic2 = weixin_helper.get_user_info(access_token,openid);   //第三步：跳轉(zhuǎn)到指定頁面   return Content(WeChatResultJson());  }  /// <summary>  /// 微信登錄返回action, 處理用戶信息  /// </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/":/"出錯啦，Access Token已過期或不存在！/"}";   }   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)) //調(diào)用access_token前需判斷是否過期   {    Dictionary<string, object> dic1 = weixin_helper.get_refresh_token(oauth_refresh_token);//如果已過期則重新?lián)Q取新的access_token    if (dic1 == null || !dic1.ContainsKey("access_token"))    {     return "{/"openid/":/"0/", /"msg/":/"出錯啦，無法獲取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/":/"出錯啦，無法獲取授權(quán)用戶信息！/"}";   }   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/":/"出錯啦，無法獲取授權(quán)用戶信息！/"}";   }  }  #endregion