public async Task <IActionResult> OnPostAsync()
        {
            if (!ModelState.IsValid)
            {
                return(Page());
            }

            _context.Attach(Alunos).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!AlunosExists(Alunos.id))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(RedirectToPage("./Index"));
        }
        public async Task <IActionResult> OnPostAsync()
        {
            if (!ModelState.IsValid)
            {
                return(Page());
            }

            _context.Alunos.Add(Alunos);
            await _context.SaveChangesAsync();

            return(RedirectToPage("./Index"));
        }
        public async Task <IActionResult> OnPostAsync(int?id)
        {
            if (id == null)
            {
                return(NotFound());
            }

            Alunos = await _context.Alunos.FindAsync(id);

            if (Alunos != null)
            {
                _context.Alunos.Remove(Alunos);
                await _context.SaveChangesAsync();
            }

            return(RedirectToPage("./Index"));
        }