add button inside custom column in sales order grid page

To extend Magento 2 answer , i added as below :

app/code/community/Raveinfosys/Deleteorder/Block/Adminhtml/Sales/Order/Grid.php : Function : _prepareColumns()

if (Mage::getSingleton('admin/session')->isAllowed('sales/order/actions/view')) { $this->addColumn('action', array( 'header' => Mage::helper('sales')->__('Action'), 'width' => '100px', 'type' => 'action', 'getter' => 'getId', 'renderer' => 'deleteorder/adminhtml_sales_order_render_delete', 'filter' => false, 'sortable' => false, 'index' => 'stores', 'is_system' => true, )); } 

app/code/community/Raveinfosys/Deleteorder/Block/Adminhtml/Sales/Order/Render - Delete.php :

class Raveinfosys_Deleteorder_Block_Adminhtml_Sales_Order_Render_Delete extends Mage_Adminhtml_Block_Widget_Grid_Column_Renderer_Abstract { public function render(Varien_Object $row) { $getData = $row->getData(); $message = Mage::helper('sales')->__('Are you sure you want to delete this order?'); $orderID = $getData['entity_id']; $view = $this->getUrl('*/sales_order/view',array('order_id' => $orderID)); $delete = $this->getUrl('*/deleteorder/delete',array('order_id' => $orderID)); $link = '<a href="'.$download.'">Download</a>&nbsp;&nbsp;&nbsp;&nbsp;<a>'; return $link; } }