public ActionResult Edit(Guid?id)
 {
     try
     {
         var pianoType = Db.PianoTypes.FirstOrDefault(x => x.Id == id);
         var model     = new NewPianoTypeVm()
         {
             Id   = pianoType.Id,
             Code = pianoType.Code,
             Type = pianoType.Type,
         };
         return(PartialView("~/Views/PianoTypes/Add.cshtml", model));
     }
     catch (Exception ex)
     {
         return(Json(new JsonResponse()
         {
             IsSucess = false, ErrorMessage = ex.Message
         }, JsonRequestBehavior.AllowGet));
     }
 }
        public ActionResult Save(NewPianoTypeVm vm)
        {
            try
            {
                if (vm.Id == null)
                {
                    PianoType pianoType = new PianoType()
                    {
                        Id        = Guid.NewGuid(),
                        Code      = vm.Code,
                        Type      = vm.Type,
                        CreatedAt = DateTime.Now,
                        CreatedBy = LoggedInUser?.UserName
                    };
                    Db.PianoTypes.Add(pianoType);
                }
                else
                {
                    var pianoType = Db.PianoTypes.FirstOrDefault(x => x.Id == vm.Id);
                    pianoType.Code = vm.Code;
                    pianoType.Type = vm.Type;
                }
                Db.SaveChanges();

                return(Json(new JsonResponse()
                {
                    IsSucess = true
                }, JsonRequestBehavior.AllowGet));
            }
            catch (Exception ex)
            {
                return(Json(new JsonResponse()
                {
                    IsSucess = false, ErrorMessage = ex.Message
                }, JsonRequestBehavior.AllowGet));
            }
        }