BULK Update in YII using CGRIDVIEW

A Description of the action of UpdateALL button
<b>
<font color="red"> Bulk Update: </font>
Select same file number in the office list by clicking the check boxes beside the file numbers
and then click new button "Update ALL", then provide all the required fields and click save. This saves all the files.
</b>

<div class="row buttons">
<center>
      <table border='0'>
      <tr>
      <td> <img src="<?php echo $imgpath ?>" />
      </td>
      <td><?php echo CHtml::button('Update ALL',array('name'=>'btnupdateall','class'=>'updateall-button')); ?>
      </td>
      </tr>
      </table>
        </center>
</div>