ASP.NET 网站超时跳转到登录界面

利用actionFilter过滤器实现，超时跳转到登录界面

/// <summary>
/// 登录超时跳转至登录界面
/// </summary>
public class LoginFilter : ActionFilterAttribute, IActionFilter
{
void IActionFilter.OnActionExecuted(ActionExecutedContext filterContext)
{
if (filterContext.HttpContext.Session["timeout"] != null)
{
　　TimeSpan t;
　　t = DateTime.Now - (DateTime)filterContext.HttpContext.Session["timeout"];

// 
　　if (t.Minutes >=60 )
　　{
　　RedirectResult result = new RedirectResult("/USER/Login");
　　filterContext.Result = result;
}
else
{
　　filterContext.HttpContext.Session["timeout"] = DateTime.Now;
}
}
else
{
　　filterContext.HttpContext.RewritePath("/USER/Login");
}

}

void IActionFilter.OnActionExecuting(ActionExecutingContext filterContext)
{

}
}