private void Ok_AddTrainess_Click(object sender, EventArgs e) { if (nud_AddTrainess_class.Value.ToString().Length > 0 && tb_AddTrainess_fam.Text.Length > 0 && tb_AddTrainess_name.Text.Length > 0 && tb_AddTrainess_middle.Text.Length > 0) { if (TrainessEdited == null) { DataTrainess.TrainessAdd(Convert.ToInt32(nud_AddTrainess_class.Value), tb_AddTrainess_fam.Text, tb_AddTrainess_name.Text, tb_AddTrainess_middle.Text); } else { TrainessEdited.TrainessEdit(Convert.ToInt32(nud_AddTrainess_class.Value), tb_AddTrainess_fam.Text, tb_AddTrainess_name.Text, tb_AddTrainess_middle.Text); } Close(); } else { MessageBox.Show("Пожалуйства, заполните все данные!"); } }