public async Task <IActionResult> Edit(string id, [Bind("NhMa,NhNamhoc")] Namhoc namhoc)
        {
            if (id != namhoc.NhMa)
            {
                return(NotFound());
            }

            if (ModelState.IsValid)
            {
                try
                {
                    _context.Update(namhoc);
                    await _context.SaveChangesAsync();
                }
                catch (DbUpdateConcurrencyException)
                {
                    if (!NamhocExists(namhoc.NhMa))
                    {
                        return(NotFound());
                    }
                    else
                    {
                        throw;
                    }
                }
                return(RedirectToAction(nameof(Index)));
            }
            return(View(namhoc));
        }
        public IActionResult Delete(int id)
        {
            try
            {
                Namhoc nh = db.Namhoc.Find(id);

                if (nh != null)
                {
                    if (db.Congviec.Where(x => x.Manamhoc == nh.Manamhoc).Count() > 0 || db.Khenthuong.Where(a => a.Manamhoc == nh.Manamhoc).Count() > 0 || db.Danhgia.Where(y => y.Manamhoc == nh.Manamhoc).Count() > 0)
                    {
                        return(BadRequest());
                    }
                    else
                    {
                        db.Namhoc.Remove(nh);
                        db.SaveChanges();
                        return(Ok());
                    }
                }
                else
                {
                    return(BadRequest());
                }
            }
            catch
            {
                throw;
            }
        }
        public async Task <IActionResult> Create([Bind("NhMa,NhNamhoc")] Namhoc namhoc)
        {
            if (ModelState.IsValid)
            {
                _context.Add(namhoc);
                await _context.SaveChangesAsync();

                return(RedirectToAction(nameof(Index)));
            }
            return(View(namhoc));
        }
 public int Edit(Namhoc nh)
 {
     try
     {
         db.Entry(nh).State = EntityState.Modified;
         db.SaveChanges();
         return(1);
     }
     catch
     {
         throw;
     }
 }
 public int Create([FromBody] Namhoc nh)
 {
     db.Namhoc.Add(nh);
     try
     {
         if (ModelState.IsValid)
         {
             db.SaveChanges();
         }
         return(1);
     }
     catch (DbUpdateException)
     {
         throw;
     }
 }