How to retreive data

public ActionResult Signin([Bind(Include = "id,emailid,password")] datatable datatable)
        {   TempData["username"] = db.datatables.Where(x => x.emailid == datatable.emailid && x.password == datatable.password).Select(x =>x.name).FirstOrDefault();
                return RedirectToAction("Details");
            }
    public ActionResult Details()
        {  ViewBag.name = TempData["username"];}