How To Retian Dropdown's Selected Value After Page Post Back In Yii?

I have dropdown that is binding in modal. using the below code:

public function getYears()


{


    for ($i=date('Y');$i>=2012;$i--)


    {


			$years["{$i}"]="{$i}";


    }


   return $years;                  


}

and my view is :

 <div class="row">


 <?php echo $form->labelEx($model,'year'); ?>


 <?php echo CHtml::activedropDownList($model,'years',$model->getYears(),array('class'=>'myClass')); ?>


 <?php echo $form->error($model,'year'); ?>


  


 <?php echo $form->labelEx($model,'name'); ?>


 <?php


$this->widget('zii.widgets.jui.CJuiAutoComplete', array(


'name'=>'name',


'source'=>$this->createUrl('reports/autocompleteTest'),


'options'=>array(


		'delay'=>300,


   		'minLength'=>2,		 


		'showAnim'=>'fold',


),


));


?>


  <?php echo $form->error($model,'name'); ?> 


  


  <?php echo $form->labelEx($model,'Status'); ?>


  <?php echo $form->dropDownList($model,'is_active',array("1"=>"Active","0"=>"InActive")); ?> 


  <?php echo $form->error($model,'Status'); ?>


  


   </div>


<div class="summary_btn buttons"> <?php echo CHtml::submitButton('Search'); ?> </div>


<?php $this->endWidget(); ?>

</div>

</div>

Now when i click on a button(Search), my page is making post back. and it rebinds the dropdown list. i dont know how can i retain the selected value in dropdown after the button click. I am new to yii. Please help me.

When i click on a button (Search).