public async Task <IActionResult> OnPostAsync() { if (!ModelState.IsValid) { return(Page()); } dbContext.Attach(Note).State = EntityState.Modified; try { await dbContext.SaveChangesAsync(); } catch (DbUpdateConcurrencyException ex) { throw new Exception($"Note: '{Note.Id}' could not be edited", ex); } return(RedirectToPage("/Notes")); }