<massaction name="listing_massaction">
            <action name="delete">
                <settings>
                    <confirm>
                        <message translate="true">Delete selected items?</message>
                        <title translate="true">Delete items</title>
                    </confirm>
                    <url path="*/items/MassDelete"/>
                    <type>delete</type>
                    <label translate="true">Delete</label>
                </settings>
            </action>
        </massaction>

<?php
namespace ECDownloadsControllerAdminhtmlItems;

use MagentoBackendAppAction;

/**
 * Class MassDelete
 */
class MassDelete extends MagentoBackendAppAction
{
    /**
     * @return MagentoBackendModelViewResultRedirect
     */
    public function execute()
    {
        $ids = $this->getRequest()->getParam('downloads_id');
        echo $ids;
        exit;

        if (!is_array($ids) || empty($ids)) {
            echo 'Bad';
            exit;

            $this->messageManager->addError(__('Please select Item.'));
        } else {
            echo 'Good';
            exit;

            try {
                foreach ($ids as $id) {
                    $emp = $this->_objectManager->get('ECDownloadsModelDownloads')->load($id);
                    $emp->delete();
                }
                $this->messageManager->addSuccess(
                    __('A total of %1 record(s) have been deleted.', count($ids))
                );
            } catch (Exception $e) {
                $this->messageManager->addError($e->getMessage());
            }
        }
        return $this->resultRedirectFactory->create()->setPath('downloads/index/items');
    }
}