Prado\Web\UI\WebControls\TDataList::getSelectedDataKey PHP Méthode

    public function getSelectedDataKey()
    {
        if ($this->getDataKeyField() === '') {
            throw new TInvalidOperationException('datalist_datakeyfield_required');
        }
        $index = $this->getSelectedItemIndex();
        $dataKeys = $this->getDataKeys();
        if ($index >= 0 && $index < $dataKeys->getCount()) {
            return $dataKeys->itemAt($index);
        } else {
            return null;
        }
    }