// Edit
public ActionResult Edit(long id)
{
BatchViewModel model = new BatchViewModel();
model = BatchRepo.ById(id);
ViewBag.tanggalmulai = model.periodFrom?.ToString("yyyy'-'MM'-'dd");
ViewBag.tanggalselesai = model.periodTo?.ToString("yyyy'-'MM'-'dd");
ViewBag.roomList = new SelectList(RoomRepo.All(), "id", "name");
ViewBag.BootcampTypeList = new SelectList(BootcampTypeRepo.All(), "id", "name");
ViewBag.technologyList = new SelectList(TechnologyRepo.All(), "id", "name");
ViewBag.TerainerList = new SelectList(TrainerRepo.ByTechnology(model.technologyId), "id", "name"); // Mencari Berdasarkan Technologi
return(PartialView("_Edit", model));
}