private void btaddDriver_Click(object sender, EventArgs e) { MethodsManager m = new MethodsManager(this); try { if ((tbdrivername.Text != "") && (tbdriversecond.Text != "") && (tbdriverthird.Text != "") && (tbpasspot.Text != "") && (tbidentity.Text != "") && (tbidentity.Text != "")) { m.AddDriver(); } else { MessageBox.Show("Введите данные"); } dgvman.Rows.Clear(); dgvman.Rows.Clear(); m.LoadDrivers(); m.ShowDrivers(); } catch (Exception ex) { MessageBox.Show("ИНН равен 10 символов"); } }