public async Task <IActionResult> Edit(int id, [Bind("MachineMaintenanceId,MachineId,MaintenanceId,MaintenanceTime,MaintenanceCost")] MachineMaintenance machineMaintenance)
        {
            if (id != machineMaintenance.MachineMaintenanceId)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(machineMaintenance);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!MachineMaintenanceExists(machineMaintenance.MachineMaintenanceId))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction("Index"));
            }
            ViewData["MachineId"]     = new SelectList(_context.Machines, "MachineId", "MachineName", machineMaintenance.MachineId);
            ViewData["MaintenanceId"] = new SelectList(_context.Maintenances, "MaintenanceId", "MaintenanceType", machineMaintenance.MaintenanceId);
            return(View(machineMaintenance));
        }
        public async Task <IActionResult> Create(int?id, [Bind("MachineMaintenanceId,MachineId,MaintenanceId,MaintenanceTime,MaintenanceCost")] MachineMaintenance machineMaintenance)
        {
            if (ModelState.IsValid)
            {
                if (id.HasValue)
                {
                    machineMaintenance.MachineId = id.Value;
                }
                _context.Add(machineMaintenance);
                await _context.SaveChangesAsync();

                return(RedirectToAction("Details", "Machines", new { id }));
            }
            if (id == null)
            {
                ViewData["MachineId"] = new SelectList(_context.Machines, "MachineId", "MachineName", machineMaintenance.MachineId);
            }
            else
            {
                ViewData["MachineId"] = id;
            }
            ViewData["MaintenanceId"] = new SelectList(_context.Maintenances, "MaintenanceId", "MaintenanceType", machineMaintenance.MaintenanceId);
            return(PartialView(machineMaintenance));
        }