/// <summary>
/// 得到access_token
/// </summary>
/// <returns></returns>
public static string GetAccessToken()
{
//判断当前cookie是否存在
HttpCookie accessTokenCookie = HttpContext.Current.Request.Cookies["access_token"];
if (accessTokenCookie == null || string.IsNullOrEmpty(accessTokenCookie.Value))
{
AccessTokenJson token = GetWeChatToken();
if (token != null)
{
accessTokenCookie = new HttpCookie("access_token", token.access_token);
accessTokenCookie.Expires = DateTime.Now.AddSeconds(token.expires_in);
HttpContext.Current.Response.Cookies.Set(accessTokenCookie);
return(token.access_token);
}
else
{
return("");
}
}
else
{
return(accessTokenCookie.Value);
}
}
/// <summary>
/// 请求微信服务器得到access_token
/// </summary>
/// <returns></returns>
private static AccessTokenJson GetWeChatToken()
{
try
{
string appId = ConfigurationManager.AppSettings["appid"];
string secret = ConfigurationManager.AppSettings["appsecret"];
string url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appId + "&secret=" + secret + "";
string result = GetRespone(url);
AccessTokenJson json = result.DeserializeJson <AccessTokenJson>();
if (json == null)
{
return(null);
}
else
{
return(json);
}
}
catch (Exception ex)
{
return(null);
}
}
