如何使Yii2处理数据提供者的两个不同实例

这是siteController index.php。在这里，我想在同一页上显示来自不同表格的两个列表。但它只显示两个div的一个表数据。当我在两个div小部件上都只设置$dataProvider时，如果我设置了在actionIndex（）中创建的$dataProvider2，则会出现错误$dataProvider2。

                        <?= GridView::widget([
                        'dataProvider' => $dataProvider,
                        'columns' => [
                            ['class' => 'yii'grid'SerialColumn'],
                       [
                           'attribute'=>'practiceCode',
                           'format' => 'raw',
                           'value'=>function ($model, $index, $widget) {
                       },
                    ],
                    'firstName',
                        ],
              ]); ?>
            </div>
            <div class="col-lg-6" style="border:solid 1px;">
                <h2>Member</h2>
                <?= GridView::widget([
                        'dataProvider2' => $dataProvider2,//Error $dataProvider2 not found
                        'columns' => [
                            ['class' => 'yii'grid'SerialColumn'],
                       [
                           'attribute'=>'memberCode',
                           'format' => 'raw',
                           'value'=>function ($model, $index, $widget) {
                       },
                    ],
                    'firstName',
              ]); ?>    
            </div>

这是actionIndex（），我在这里写了两个dataProvider（$dataProvider，$dataProvider2），但我无法在index.php小部件中设置此dataProvider

public function actionIndex()
    {
        $query = new 'yii'db'Query;
        $query->select('*')
              ->from('practice');
        $query->createCommand();
        $dataProvider = new ActiveDataProvider([
            'query' => $query,
            'pagination' => [
            'pageSize' => 10,
             ],
        ]);
        $query = new 'yii'db'Query;
        $query->select('*')
              ->from('member');
        $query->createCommand();
        $dataProvider2 = new ActiveDataProvider([
            'query' => $query,
            'pagination' => [
            'pageSize' => 10,
             ],
]);
        return $this->render('index', [
            'dataProvider' => $dataProvider,'dataprovider2'=>$dataProvider2 ]);
}