private void FormModelOnBeforeAddToIndex(FormModel sender, FormEditorCancelEventArgs formEditorCancelEventArgs) { if(sender.AllValueFields().Any(f => f.HasSubmittedValue && f.SubmittedValue.Equals("bad", StringComparison.InvariantCultureIgnoreCase))) { formEditorCancelEventArgs.Cancel = true; formEditorCancelEventArgs.ErrorMessage = "Bad values are not accepted."; } }