1 微信開放平臺：https://open.weixin.qq.com/
3.pc頁面顯示
4. 通過官方提供的文檔，我們可以看出一共分4個步驟
第一步：請求CODE
第二步：通過code獲取access_token
第三步：通過access_token調用接口
第4步：獲取用戶個人信息（UnionID機制）
api：核心代碼
public class weixin_helper { public weixin_helper() { } /// <summary> /// 根據AppID和AppSecret獲得access token(默認過期時間為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，成功授權后回調時會原樣帶回</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; } }控制器的核心代碼：
#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"; //開始發送 return Redirect(send_url); //跳轉到微信自己 指定的關聯登陸頁面 } /// <summary> /// 微信登錄返回action /// </summary> public ActionResult WeChatReturnUrl(string state, string code) { //取得返回參數 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();//用戶唯一標示openid //儲存獲取數據用到的信息 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據庫中 #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);//如果已過期則重新換取新的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，無法獲取授權用戶信息！/"}"; } } #endregion新聞熱點
疑難解答
