/// <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 = System.Web.HttpContext.Current.Server.MapPath("/XMLFile.xml");
string errorfilepath = System.Web.HttpContext.Current.Server.MapPath("/Error.xml");
StreamReader str = new StreamReader(filepath, System.Text.Encoding.UTF8);
XmlDocument xml = new XmlDocument();
xml.Load(str);
str.Close();
str.Dispose();
StreamReader errorstr = new StreamReader(errorfilepath, System.Text.Encoding.UTF8);
XmlDocument errorXml = new XmlDocument();
errorXml.Load(errorstr);
errorstr.Close();
errorstr.Dispose();
Token = xml.SelectSingleNode("xml").SelectSingleNode("Access_Token").InnerText;
YouXRQ = Convert.ToDateTime(xml.SelectSingleNode("xml").SelectSingleNode("Access_YouXRQ").InnerText);
errorXml.SelectSingleNode("error").SelectSingleNode("errorstr").InnerText = "date later(" + DateTime.Now.AddMinutes(-2) + ") than now(" + YouXRQ + ")";
if (DateTime.Now.AddMinutes(-2) > YouXRQ)
{
DateTime _youxrq = DateTime.Now;
Access_token mode = GetAccess_token();
//XmlElement node = errorXml.CreateElement("access_token");
//node.InnerText = mode.access_token;
//errorXml.SelectSingleNode("error").AppendChild(node);
if (!string.IsNullOrEmpty(mode.access_token))
{
xml.SelectSingleNode("xml").SelectSingleNode("Access_Token").InnerText = mode.access_token;
_youxrq = _youxrq.AddSeconds(mode.expires_in);
xml.SelectSingleNode("xml").SelectSingleNode("Access_YouXRQ").InnerText = _youxrq.ToString();
xml.Save(filepath);
Token = mode.access_token;
}
}
errorXml.Save(errorfilepath);
return(Token);
}
public static Access_token GetAccess_token()
{
Inition();
string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appId + "&secret=" + WxPayConfig.APPSECRET;
string result = HttpService.Get(url);
Access_token mode = new Access_token();
if (!string.IsNullOrEmpty(result))
{
JObject jd = (JObject)Newtonsoft.Json.JsonConvert.DeserializeObject(result);
if (jd.Property("access_token") != null)
{
mode.access_token = (string)jd["access_token"];
mode.expires_in = (int)jd["expires_in"];
}
else
{
Log.Debug("GET ACCESS_TOKEN:", result + " url:" + url);
}
}
return(mode);
}