Kartik export widget not export search result Yii2 - widget

Question

Fighting form last 3 days not able to find what exactly problem is. When after search I export data it export all data, expected to export search result.Please help!
My Controller
public function actionAdvancesearch()
{
$searchModel = new CandidateSearch();
$model = new Candidate();
$dataProvider1 = $searchModel->search(Yii::$app->request->queryParams);
if(Yii::$app->request->post()){
$postedData=Yii::$app->request->post();
$searchModel = new CandidateSearch();
$dataProvider1 = $searchModel->searchAdvanced();
return $this->render('candidateAdvSearch', ['dataProvider1' => $dataProvider1,
'model' => $model ,
'searchModel' => $searchModel,
'posted'=>"posted",
'postedData'=>$postedData]);
}else{
return $this->render('candidateAdvSearch', ['searchModel' => $searchModel, 'model' => $model, 'dataProvider1' => $dataProvider1]);
}
}
View
Pjax::begin();
if($dataProvider1){
$gridColumns = [
[
'attribute'=>'HRMS_candidateID',
'label'=>'Candidate ID',
'vAlign'=>'middle',
'width'=>'190px',
'value'=>function ($model, $key, $index, $widget) {
return $model->HRMS_candidateID;
},
'format'=>'raw'
],
[
'attribute'=>'HRMS_candidateFirstName',
'label'=>'Candidate FirstName',
'vAlign'=>'middle',
'width'=>'190px',
'value'=>function ($model, $key, $index, $widget) {
return $model->HRMS_candidateFirstName;
},
'format'=>'raw'
],
[
'attribute'=>'HRMS_candidateLastName',
'label'=>'Candidate LastName',
'vAlign'=>'middle',
'width'=>'190px',
'value'=>function ($model, $key, $index, $widget) {
return $model->HRMS_candidateLastName; },
'format'=>'raw'
],
];
$fullExportMenu = ExportMenu::widget([
'dataProvider' => $dataProvider1,
'columns' => $gridColumns,
'target' => ExportMenu::TARGET_POPUP,
'fontAwesome' => true,
'pjaxContainerId' => 'kv-pjax-container',
'dropdownOptions' => [
'label' => 'Full',
'class' => 'btn btn-default',
'itemsBefore' => [
'<li class="dropdown-header">Export All Data</li>',
],
],
]);
// Generate a bootstrap responsive striped table with row highlighted on hover
echo GridView::widget([
'dataProvider' => $dataProvider1,
'columns' => $gridColumns,
'pjax' => true,
'pjaxSettings' => ['options' => ['id' => 'kv-pjax-container']],
'panel' => [
'type' => GridView::TYPE_PRIMARY,
'heading' => '<h3 class="panel-title"><i class="glyphicon glyphicon-book"></i> Candidate Advanced Search</h3>',
],
'toolbar' => [
$fullExportMenu,
],
'striped'=>true,
'hover'=>true,
'responsive'=>true,
'hover'=>true,
'resizableColumns'=>true,
'persistResize'=>false,
'columns' => $gridColumns,
]);
}
Pjax::end();