public async Task <IActionResult> SuaChuDe(int id, ThemChuDeViewModel model)
        {
            var chude = await context.ChuDe.FindAsync(id);

            chude.TenChuDe = model.TenChuDe;
            context.ChuDe.Update(chude);
            await context.SaveChangesAsync();

            return(RedirectToAction(nameof(Index)));
        }
        public async Task <IActionResult> ThemChuDe(ThemChuDeViewModel model)
        {
            var chude = new ChuDe
            {
                TenChuDe = model.TenChuDe,
            };
            await context.ChuDe.AddAsync(chude);

            await context.SaveChangesAsync();

            return(RedirectToAction(nameof(Index)));
        }