private void btnUpdateMarca_Click(object sender, EventArgs e)
{
int id = int.Parse(dgvMarca.Rows[dgvMarca.CurrentRow.Index].Cells[0].Value.ToString());
brandForm = new BrandControlForm(id);
brandForm.ShowDialog();
}
private void btnAddMarca_Click(object sender, EventArgs e)
{
brandForm = new BrandControlForm();
brandForm.ShowDialog();
}