Yii Class CActiveDataProvider not found

[Raafat]

 

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I'm new to Yii, and I'm getting this error "Class 'app\controllers\CActiveDataProvider' not found" while running a widget.

This is my code:

models/industrial.php:

<?php

namespace app\models;

use yii\db\ActiveRecord;

class Industrial extends ActiveRecord
{
}

 

 

 

 

controllers/IndustrialController.php:

<?php

namespace app\controllers;

use yii\web\Controller;
use yii\data\Pagination;
use app\models\industrial;


class IndustrialController extends Controller
{


public function actionIndex()
{
$dataProvider=new CActiveDataProvider('Industrial', array(

'pagination'=>array(
'pageSize'=>20,
),
));
$query = industrial::find();

$pagination = new Pagination([
'defaultPageSize' => 20,
'totalCount' => $query->count(),
]);

$industrials = $query->orderBy('Company_Name')
->offset($pagination->offset)
->limit($pagination->limit)
->all();




return $this->render('index', [
'industrials' => $industrials,
'pagination' => $pagination,
'dataProvider'=>$dataProvider,
]);



}
}

 

 

 

 

views/industrial/index.php:

<?php
use yii\helpers\Html;
use yii\widgets\LinkPager;
?>
<h1>Industrial Companies</h1>
<ul>
<?php

use kartik\export\ExportMenu;

use kartik\grid\GridView;

$gridColumns = [
['class' => 'yii\grid\SerialColumn'],
'id',
'name',
[
'attribute'=>'Name',
'label'=>'Name',
'vAlign'=>'middle',
'width'=>'190px',
'value'=>function ($model, $key, $index, $widget) {
return Html::a($model->Name, '#', []);
},
'format'=>'raw'
],
'Name',
'Location',
'Telephone',

];
echo ExportMenu::widget([
'dataProvider' => $dataProvider,
'columns' => $gridColumns,
'fontAwesome' => true,
'dropdownOptions' => [
'label' => 'Export All',
'class' => 'btn btn-default'
]
]) . "<hr>\n".
GridView::widget([
'dataProvider' => $dataProvider,
'columns' => $gridColumns,
'export' => [
'fontAwesome' => true,
]
]);



$array = (array) $industrials;



function build_table($array){

// start table

$html = '<table class="altrowstable" id="alternatecolor">';

// header row

$html .= '<tr>';

foreach($array[0] as $key=>$value){

$html .= '<th>' . $key . '</th>';

}

$html .= '</tr>';

// data rows

foreach( $array as $key=>$value){

$html .= '<tr>';

foreach($value as $key2=>$value2){

$html .= '<td>' . $value2 . '</td>';

}

$html .= '</tr>';

}

// finish table and return it

$html .= '</table>';

return $html;

}



echo build_table($array);

?>


<?= LinkPager::widget(['pagination' => $pagination]) ?>

 

I'm getting this error in IndustrialController at  $dataProvider=new CActiveDataProvider('Industrial', array( 'pagination'=>array( 'pageSize'=>20, ), ));

 

What is the problem here? Could you please help me?