public async Task <string> ChangeStandard(ChangeAllViewModel change)
        {
            var list = await dataContext.Cells.AsNoTracking().Where(x => x.StandardId == change.OldId).ToListAsync();

            for (int i = 0; i < list.Count; i++)
            {
                list[i].StandardId = change.NewId;
                dataContext.Cells.Update(list[i]);
            }
            return(await SaveAsync());
        }
        public async Task <IActionResult> _ChangeStandard(ChangeAllViewModel change)
        {
            if (!ModelState.IsValid)
            {
                return(View(change));
            }

            var result = await _standartRepository.ChangeStandard(change);

            if (result != null)
            {
                ModelState.AddModelError("", result);
                return(View("_ChangeStandard", change));
            }

            return(View(nameof(GetStandart), new { id = change.OldId }));
        }