private void btnAgregar_Click(object sender, EventArgs e)
{
frmAlta alta = new frmAlta();
alta.ShowDialog();
cargar();
}
private void btnModificar_Click(object sender, EventArgs e)
{
Articulo Art;
Art = (Articulo)dgvlista.CurrentRow.DataBoundItem;
frmAlta modificar = new frmAlta(Art);
modificar.ShowDialog();
cargar();
}