public async Task <IActionResult> Edit(Int32?id, DoctorCreateEditViewModel model)
        {
            if (id == null)
            {
                return(NotFound());
            }
            var doctor = await this._context.Doctors.
                         SingleOrDefaultAsync(m => m.Id == id);

            if (doctor == null)
            {
                return(this.NotFound());
            }



            if (ModelState.IsValid)
            {
                doctor.Name      = model.Name;
                doctor.Specialty = model.Specialty;
                await _context.SaveChangesAsync();

                return(RedirectToAction(nameof(Index)));
            }
            return(View(doctor));
        }
        public async Task <IActionResult> Create(DoctorCreateEditViewModel model)
        {
            if (ModelState.IsValid)
            {
                var doctor = new Doctor
                {
                    Name      = model.Name,
                    Specialty = model.Specialty
                };
                _context.Add(doctor);
                await _context.SaveChangesAsync();

                return(RedirectToAction(nameof(Index)));
            }
            return(View(model));
        }
        // GET: Doctors/Edit/5
        public async Task <IActionResult> Edit(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            var doctor = await _context.Doctors.SingleOrDefaultAsync(m => m.Id == id);

            if (doctor == null)
            {
                return(NotFound());
            }
            var model = new DoctorCreateEditViewModel {
                Name      = doctor.Name,
                Specialty = doctor.Specialty
            };

            return(View(model));
        }