Keep Zend From Looking for a View File

I was working with PHPExcel in a Zend Framework and didn't want to have to create an empty view file for an action that's always going to create an Excel file. I looked it up and you can disable Zend looking for a view file using the code below.

public function downloadAction(){
    $this->_helper->viewRenderer->setNoRender(true);
    // output binary data here
}