public ActionResult Register()
        {
            var hmc = hmcRepository.GetAll();
            var cities = cityRepository.GetAll();
            var streets = streetRepository.GetByCityId(1)//default city id
            var houses = new List<House>();

            var model = new RegisterModel
                {
                    CityList = new SelectList(cities, "Id", "Name"),
                    HmcList = new SelectList(hmc, "Id", "Name"),
                    StreetList = new SelectList(streets, "Id", "Name"),
                    HouseList = new SelectList(houses, "Id", "Number")
                };

            return View(model);
        }

public ActionResult GetStreets(int id)
        {
            return this.Json(streetRepository.GetByCityId(id), JsonRequestBehavior.AllowGet);
        }

        public ActionResult GetHouses(int id)
        {
            return this.Json(houseRepository.GetAllByStreetId(id), JsonRequestBehavior.AllowGet);
        }

 [HttpPost]
        public ActionResult Register(RegisterModel model)
        {
            if (ModelState.IsValid)
            {
                // Attempt to register the user
                MembershipCreateStatus createStatus;
                Membership.CreateUser(model.Email, model.Password, model.Email, null, null, true, null, out createStatus);

                if (createStatus == MembershipCreateStatus.Success)
                {
                    FormsAuthentication.SetAuthCookie(model.Email, false /* createPersistentCookie */);
                    Roles.AddUserToRole(model.Email, "customer");
                    return RedirectToAction("Index", "Home");
                }
                else
                {
                    ModelState.AddModelError("", ErrorCodeToString(createStatus));
                }
            }

            // If we got this far, something failed, redisplay form
            var hmc = hmcRepository.GetAll();
            var cities = cityRepository.GetAll();
            var streets = streetRepository.GetByCityId(Convert.ToInt32(model.SelectedCity));
            var houses = houseRepository.GetAllByStreetId(Convert.ToInt32(model.SelectedStreet));
            model = new RegisterModel
            {
                CityList = new SelectList(cities, "Id", "Name"),
                HmcList = new SelectList(hmc, "Id", "Name"),
                StreetList = new SelectList(streets, "Id", "Name"),
                HouseList = new SelectList(houses, "Id", "Number")
            };
            return View(model);
        }