/// <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()
{
try
{
string Token = string.Empty;
DateTime YouXRQ;
//读取XML文件中的数据，并显示出来
string filepath = HttpContext.Current.Request.MapPath("~/XMLFile.xml");
StreamReader str = new StreamReader(filepath, System.Text.Encoding.UTF8);
XmlDocument xml = new XmlDocument();
xml.Load(str);
str.Close();
str.Dispose();
Token = xml.SelectSingleNode("xml").SelectSingleNode("Access_Token").InnerText;
YouXRQ = Convert.ToDateTime(xml.SelectSingleNode("xml").SelectSingleNode("Access_YouXRQ").InnerText);
if (DateTime.Now > YouXRQ)
{
DateTime _youxrq = DateTime.Now;
Access_token mode = GetAccess_Token();
xml.SelectSingleNode("xml").SelectSingleNode("Access_Token").InnerText = mode.access_token;
_youxrq = _youxrq.AddSeconds(Convert.ToInt32(mode.expires_in));
xml.SelectSingleNode("xml").SelectSingleNode("Access_YouXRQ").InnerText = _youxrq.ToString();
xml.Save(filepath);
Token = mode.access_token;
}
return(Token);
}
catch (Exception ex)
{
return("");//记录日志
}
}
public static Access_token GetAccess_Token()
{
string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + "wxcbe87bb4937385db" + "&secret=" + "1d380d569f1bb50f80b29d6ed21d4e4c";
Access_token entity = new Access_token();
try {
HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url);
req.Method = "GET";
using (WebResponse wr = req.GetResponse()) {
HttpWebResponse myResponse = (HttpWebResponse)req.GetResponse();
StreamReader reader = new StreamReader(myResponse.GetResponseStream(), System.Text.Encoding.UTF8);
string content = reader.ReadToEnd();
Access_token token = new Access_token();
token = JsonHelper.ParseFromJson <Access_token>(content);
entity.access_token = token.access_token;
entity.expires_in = token.expires_in;
}
} catch { //记录日志}
return(entity);
}
return(entity);
}