public async Task <IActionResult> EditAvailableAbsence(int id, AvailableAbsence availableAbsence)
        {
            if (id != availableAbsence.IdAvailableAbsence)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(availableAbsence);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!AvailableAbsenceExists(availableAbsence.IdAvailableAbsence))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(ListAvailableAbsence)));
            }
            return(View(availableAbsence));
        }
        public async Task <IActionResult> CreateAvailableAbsence(AvailableAbsence availableAbsence)
        {
            ViewData["IdAbsenceType"] = new SelectList(_context.AbsenceType, "IdAbsenceType", "AbsenceTypeName");
            ViewData["IdEmployee"]    = new SelectList(_context.Employee, "Id", "Email");

            var existingAvailableAbsence = await _context.AvailableAbsence
                                           .Where(a => a.IdEmployee == availableAbsence.IdEmployee)
                                           .ToListAsync();

            var availableAbsenceType = new List <int>();

            foreach (AvailableAbsence aa in existingAvailableAbsence)
            {
                availableAbsenceType.Add(aa.IdAbsenceType);
            }

            if (availableAbsenceType.Contains(availableAbsence.IdAbsenceType))
            {
                return(View("AbsenceAlreadyExists"));
            }


            if (ModelState.IsValid)
            {
                _context.Add(availableAbsence);

                await _context.SaveChangesAsync();

                return(RedirectToAction("ListAvailableAbsence"));
            }

            return(View(availableAbsence));
        }