为什么我的表单身份validation票证到期如此之快？

我在ASP.NET应用程序中使用表单身份validation。 我将FormsAuthenticationTicket配置为在1年后到期，但它实际上在1小时后到期。 我无法弄清楚为什么。

以下是登录过程中涉及的所有代码：

 public static bool Login(int id) { try { string securityToken = UserHelper.AuthenticateUser(id); DateTime expiryDate = DateTime.Now.AddYears(1); FormsAuthenticationTicket ticket = new FormsAuthenticationTicket( 1, id.ToString(), DateTime.Now, expiryDate, true, securityToken, FormsAuthentication.FormsCookiePath); string encryptedTicket = FormsAuthentication.Encrypt(ticket); HttpCookie cookie = new HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket); cookie.Expires = expiryDate; HttpContext.Current.Response.Cookies.Add(cookie); return true; } catch { return false; } } 

Web.config文件：

       ... 

我的方法有问题吗？ 为什么它到期如此之快？

编辑

Global.asax代码：

 protected void Application_AuthenticateRequest(object sender, EventArgs e) { if (Request.PhysicalPath.EndsWith(".aspx") || Request.PhysicalPath.EndsWith(".axd") || Request.PhysicalPath.EndsWith(".ashx")) SecurityManager.SetPrincipal(); } 

SetPrincipal代码：

 public static void SetPrincipal() { ILivrePrincipal principal = null; FormsIdentity identity; UrlParameters urlParameters = UrlParametersHelper.GetUrlParameters(HttpContext.Current.Request); if (HttpContext.Current.Request.IsAuthenticated) { identity = (FormsIdentity)HttpContext.Current.User.Identity; User userProfile; urlParameters.SecurityToken = (((FormsIdentity)identity).Ticket).UserData; try { userProfile = UserHelper.GetUser(urlParameters.SecurityToken); UserHelper.UpdateLastActiveOn(userProfile); principal = new AuthenticatedPrincipal(identity, userProfile); } catch { //TODO: Log an exception FormsAuthentication.SignOut(); principal = new AnonymousPrincipal(new GuestIdentity(), UserHelper.GetUser(null)); } } else { principal = new AnonymousPrincipal(new GuestIdentity(), UserHelper.GetUser(null)); } HttpContext.Current.User = principal; }