Popup close issue in Yii framework - yii

Question

How to close popup Dialog Box in "Submit" action ? Now popup gets closed but it renders to empty page,
My View Code,
<?php
echo CHtml::form('','post',array('enctype'=>'multipart/form-data'));
echo CHtml::activeFileField($model, 'name');
echo CHtml::submitButton('Submit', array('submit' => 'SaveAttachDocuments'));
echo CHtml::endForm();?>
My Controller Code,
public function actionSaveAttachDocuments()
{
$model=new DocumentAttachmentModel();
// Uncomment the following line if AJAX validation is needed
$filename =CUploadedFile::getInstance($model,'name');
echo "model -> ".$filename;
$model->type =pathinfo($filename, PATHINFO_EXTENSION);
$model->name =pathinfo($filename,PATHINFO_FILENAME);
$model->save();
echo CHtml::script("window.parent.$('#Attach-New-Documents').dialog('close'); window.parent.$.fn.yiiGridView.update('Attach-new-grid');");
Yii::app()->end();
}

Answer 1

Remove this code line,
Yii::app()->end();
and then include the view file to render. (in your case it should be the view that contains the form and grid as per your image)
$this->render("admin");
so if i put things together you code should look like,
public function actionSaveAttachDocuments()
{
$model=new DocumentAttachmentModel();
// Uncomment the following line if AJAX validation is needed
$filename =CUploadedFile::getInstance($model,'name');
echo "model -> ".$filename;
$model->type =pathinfo($filename, PATHINFO_EXTENSION);
$model->name =pathinfo($filename,PATHINFO_FILENAME);
$model->save();
echo CHtml::script("window.parent.$('#Attach-New-Documents').dialog('close'); window.parent.$.fn.yiiGridView.update('Attach-new-grid');");
$this->render("admin"); // your view file
}