/// <summary>
/// 获取Access_token
/// </summary>
/// <returns></returns>
private static Access_token GetAccess_token()
{
try
{
string appid = ConfigurationManager.AppSettings["AppId"]; //微信公众号appid
string secret = ConfigurationManager.AppSettings["Secret"]; //微信公众号appsecret
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 = JsonConvert.DeserializeObject <Access_token>(content);
mode.access_token = token.access_token;
mode.expires_in = token.expires_in;
}
return(mode);
}
catch (Exception e)
{
WriteLogs("获取Access_token", "GetAccess_token", e.Message);
throw;
}
}
/// <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("./") + "\\Access_token.xml";
StreamReader str = new StreamReader(filepath, 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);
//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;
Access_token mode = GetAccess_token();
if (mode == null)
{
return(null);
}
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;
}
GetUser.access_token = Token;
return(Token);
}
