Filter search and pjax not working in yii2 gridview -

i used crud generator in yii2 generate codes, want make sorting, filter search , pjax working on gridview, sorting working perfectly, filter search , pjax not working.. below code.. controller.. actionindex

$searchmodel = new productsearch(); $dataprovider = $searchmodel->search(yii::$app->request->queryparams);      return $this->render('index', [     'searchmodel' => $searchmodel,      'dataprovider' => $dataprovider, 

my view file index.php

<?php echo $this->render('_search', ['model' => $searchmodel]); ?>   <?php pjax::begin(); ?> <?= gridview::widget([     'dataprovider' => $dataprovider,    'filtermodel' => $searchmodel,     'pager' => [     'firstpagelabel' => 'first',     'lastpagelabel' => 'last',     'prevpagelabel' => '<span class="glyphicon glyphicon-chevron-left"></span>',     'nextpagelabel' => '<span class="glyphicon glyphicon-chevron-right"></span>',     'maxbuttoncount' => 5,      // customzing css class navigating link     'prevpagecssclass' => 'mypre',     'nextpagecssclass' => 'mynext',     'firstpagecssclass' => 'myfirst',     'lastpagecssclass' => 'mylast',   ],       'columns' => [         ['class' => 'yii\grid\serialcolumn'],         // 'product_id',         'type_name',         'name',         'descr',         'price',         [          'attribute'=>'image',         'label'=>'image',         'format'=>'html',         'value' => function ($data) {                 $url = $data['image'];                 $alt = $data['name'];                 return html::img($url, ['alt'=>$alt,'title'=>$alt,'width'=>'70','height'=>'50' ]);          }        ],         // 'added_at','         // 'updated_at',         'views',        'status',         // 'reviews',           ['class' => 'yii\grid\actioncolumn'],     ],     'tableoptions' =>['class' => 'table table-striped table-bordered'], ]); ?> <?php pjax::end(); ?> 

if render _search.php file in index page in below code search working not working in filtersearch

<?php echo $this->render('_search', ['model' => $searchmodel]); ?> 

below search models

 public function search($params) {     $query = products::find();      $dataprovider = new activedataprovider([         'query' => $query,         'pagination'=> ['defaultpagesize' => 5],     ]);      $this->load($params);      if (!$this->validate()) {         // uncomment following line if not want return records when validation fails         // $query->where('0=1');         return $dataprovider;     }      $query->andfilterwhere([         'product_id' => $this->product_id,         'type_id' => $this->type_id,         'status' => $this->status,         'price' => $this->price,         'added_at' => $this->added_at,         'updated_at' => $this->updated_at,         'views' => $this->views,     ]);      $query->andfilterwhere(['like', 'type_name', $this->type_name])         ->andfilterwhere(['like', 'name', $this->name])         ->andfilterwhere(['like', 'descr', $this->descr])         ->andfilterwhere(['like', 'image', $this->image])         ->andfilterwhere(['like', 'reviews', $this->reviews]);      return $dataprovider; 

any on how make filtersearch work , make pjax work correcly.. thanks