gridview data

hi i want store in a variable all data from my grid, in yii1 i did that like this


$dataProvider = $_SESSION['Anexo1']->getData();

now in yii2 how can i do that?

\Yii::$app->session->set(‘Anexo1’, $data);

$dataProvider = \Yii::$app->session->get(‘Anexo1’);

who would be the variable $data?