public ActionResult Poi(int?Id) { if (!Id.HasValue) { return(RedirectToAction("Index")); } Poi poi = bs.GetPoiById((int)Id); if (poi == null) { return(RedirectToAction("Index")); } List <Poi> pois = bs.GetPoiList(); PoiPM pm = new PoiPM() { poi = poi }; pm.Activiteiten = bs.getActiviteitenByPoiByUser50from(0, User.Identity.Name, poi.ID); ViewBag.gebruikerId = bs.GetUser(User.Identity.Name).Id; Session.Remove("stap3"); Session["stap2"] = poi.Naam; Session["url2"] = "../home/Poi?id=" + poi.ID; ViewBag.stap1 = Session["stap1"]; ViewBag.url1 = Session["url1"]; ViewBag.stap2 = Session["stap2"]; ViewBag.url2 = Session["url2"]; return(View(pm)); }