Magento – Add mass action in order grid to export

So what happens when the order csv is run is the following.

1. The action Mage_Adminhtml_Sales_OrderController::exportCsvAction is called,
2. This creates a grid block with $this->getLayout()->createBlock('adminhtml/sales_order_grid');,
3. This grid is then used to fill the csv in Mage_Adminhtml_Block_Widget_Grid::_exportIterateCollection

What you could do is rewrite the admin controller or make your own controller and then use this in the admin section. Then instead of simply getting a complete sales order grid you can build the grid with the correct collection including the filters selected by the user.

You've done what you need to up to wiring in your controller.

First you need to declare a route for your controller(s) in the module config XML:

...
<admin>
    ...
    <routers>
        <masscustomstatusses>
            <use>admin</use>
            <args>
                <module>VivasIndustries_MassCustomStatusses</module>
                <frontName>masscustomstatusses</frontName>
            </args>
        </masscustomstatusses>
    </routers>
    ...
</admin>
...

Then build the controller:

<?php

class VivasIndustries_MassCustomStatusses_ControllerController
    extends Mage_Adminhtml_Controller_Action
{

    public function actionAction()
    {
        // Update status here
        // Can fetch selected items with $this->getRequest()->getParam()

        die('Looks like it works');
    }

}

I've used your naming convention exactly as you have described, though I doubt that's what you really want. Better to use standard Magento convention, with controller named IndexController and base action named indexAction. But you should get the idea.

Clear cache and try to run that mass action. The die statement should run, and fill in the blanks from there.

NOTE: I should point out that you're doing the same thing twice. You are both extending the sales order grid to add a mass action AND injecting it via event observer. As the article you reference points out, those are 2 different ways to do the same thing. You should choose one of those methods, only.