private void CbProvincia_SelectionChangeCommitted(object sender, EventArgs e)
{
CbComuna.DisplayMember = "Nombre";
CbComuna.ValueMember = "ID";
CbComuna.DataSource = NObras.CbComuna(Convert.ToInt16(CbProvincia.SelectedValue));
CbComuna.SelectedItem = null;
CbITO.DisplayMember = "Nombre";
CbITO.ValueMember = "ID";
CbITO.DataSource = NObras.CbITO(Convert.ToInt16(CbProvincia.SelectedValue));
CbITO.SelectedItem = null;
}
