private void btnEliminar_Click(object sender, EventArgs e)
{
AlquilerDAO rec = new AlquilerDAO();
rec.BorrarAlquiler(a);
rec.Select("todo", dataGridView1);
btnActualizar.Enabled = false;
btnEliminar.Enabled = false;
}
private void button1_Click(object sender, EventArgs e)
{
AlquilerDAO alq = new AlquilerDAO();
alq.Select(txtConsulta.Text, dataGridView1);
}