/// <summary> /// 获取Access_token /// </summary> /// <param name="appid">微信公众号appid</param> /// <param name="secret">微信公众号appsecret</param> /// <returns></returns> private static Access_token GetAccess_token(string appid, string secret) { string strUrl = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appid + "&secret=" + secret; Access_token mode = new Access_token(); HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(strUrl); //用GET形式请求指定的地址 req.Method = "GET"; using (WebResponse wr = req.GetResponse()) { //HttpWebResponse myResponse = (HttpWebResponse)req.GetResponse(); StreamReader reader = new StreamReader(wr.GetResponseStream(), Encoding.UTF8); string content = reader.ReadToEnd(); reader.Close(); reader.Dispose(); //在这里对Access_token 赋值 Access_token token = new Access_token(); token = common.JsonHelper.ParseFromJson <Access_token>(content); mode.access_token = token.access_token; mode.expires_in = token.expires_in; } return(mode); }
/// <summary> /// 根据当前日期 判断Access_Token 是否超期 如果超期返回新的Access_Token 否则返回之前的Access_Token /// </summary> /// <param name="datetime"></param> /// <returns></returns> public static string IsExistAccess_Token() { string Token = string.Empty; DateTime YouXRQ; // 读取XML文件中的数据,并显示出来 ,注意文件路径 string filepath = HttpContext.Current.Server.MapPath("\\Files\\WXFiles\\AccessToken.xml"); XmlDocument xml = common.xmlHelper.getXML(filepath); Token = xml.SelectSingleNode("xml").SelectSingleNode("Access_Token").InnerText; YouXRQ = Convert.ToDateTime(xml.SelectSingleNode("xml").SelectSingleNode("Access_YouXRQ").InnerText); //TimeSpan st1 = new TimeSpan(YouXRQ.Ticks); //最后刷新的时间 //TimeSpan st2 = new TimeSpan(DateTime.Now.Ticks); //当前时间 //TimeSpan st = st2 - st1; //两者相差时间 if (DateTime.Now > YouXRQ) { DateTime _youxrq = DateTime.Now; string appid = xml.SelectSingleNode("xml").SelectSingleNode("appid").InnerText; string secret = xml.SelectSingleNode("xml").SelectSingleNode("secret").InnerText; Access_token mode = GetAccess_token(appid, secret); xml.SelectSingleNode("xml").SelectSingleNode("Access_Token").InnerText = mode.access_token; _youxrq = _youxrq.AddSeconds(int.Parse(mode.expires_in)); xml.SelectSingleNode("xml").SelectSingleNode("Access_YouXRQ").InnerText = _youxrq.ToString(); xml.Save(filepath); Token = mode.access_token; } return(Token); }