ASP.NET Automatic logout

Question

I am doing a group project with 4 other people. We are designing a job kiosk in ASP.NET in MVC4 with embedded c#.

I am working on having the system log the user out

Answer 1

Here is how I do it if you are using FormsAuthentication:

Controller Action:

public ActionResult CheckLogin()
{
    if (Request.Cookies["CookieName"] == null) return Json(0, JsonRequestBehavior.AllowGet);
    var cookie = Request.Cookies["CookieName"].Value;
    var ticket = FormsAuthentication.Decrypt(cookie);
    var secondsRemaining = Math.Round((ticket.Expiration - DateTime.Now).TotalSeconds, 0);
    return Json(secondsRemaining, JsonRequestBehavior.AllowGet);
}

Jquery on each page or on layout page: