在Magento中提交联系表单后重定向到特定页面

<?xml version="1.0"?><config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
   <module name="MyCompany_ContactFormRedirect" setup_version="1.0.0">
       <sequence>
           <module name="Magento_Contact"/>
        </sequence>
    </module>
</config>

<?php
namespace MyCompany\ContactFormRedirect\Controller;

use Magento\Framework\App\Action\Context;
use Magento\Framework\App\Action\Action;
use Magento\Framework\View\Result\PageFactory;
use Magento\Framework\App\RequestInterface;
use Magento\Contact\Model\ContactFactory;
use Magento\Contact\Model\ConfigInterface;
use Magento\Framework\Mail\Template\TransportBuilder;
use Magento\Framework\Translate\Inline\StateInterface;
use Magento\Framework\App\Action\HttpPostActionInterface;

class ContactForm extends Action implements HttpPostActionInterface
{
    protected $_contactFactory;
    protected $_config;
    protected $_transportBuilder;
    protected $_inlineTranslation;
    protected $_pageFactory;

    public function __construct(
        Context $context,
        ContactFactory $contactFactory,
        ConfigInterface $config,
        TransportBuilder $transportBuilder,
        StateInterface $inlineTranslation,
        PageFactory $pageFactory
    ) {
        $this->_contactFactory = $contactFactory;
        $this->_config = $config;
        $this->_transportBuilder = $transportBuilder;
        $this->_inlineTranslation = $inlineTranslation;
        $this->_pageFactory = $pageFactory;
        parent::__construct($context);
    }

    public function execute()
    {
        $post = $this->getRequest()->getPostValue();
        if ($post) {
            $this->_inlineTranslation->suspend();
            $contact = $this->_contactFactory->create();
            $contact->setData($post);
            $errors = $contact->validateData();
            $this->_inlineTranslation->resume();
            if (!count($errors)) {
                $contact->send();
                $this->messageManager->addSuccessMessage(__('Your inquiry was submitted and will be responded to as soon as possible. Thank you for contacting us.'));
                return $this->_redirect('contact/index', ['_fragment' => 'form']);
            } else {
                foreach ($errors as $error) {
                    $this->messageManager->addErrorMessage($error);
                }
            }
        }
        $resultPage = $this->_pageFactory->create();
        return $resultPage;
    }
}

<?xml version="1.0"?><config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:App/etc/routes.xsd">
   <router id="standard">
       <route id="contactformredirect" frontName="contactformredirect">
           <module name="MyCompany_ContactFormRedirect" />
        </route>
    </router>
</config>

<form action="<?php echo $block->getUrl('contactformredirect/contactform/index') ?>" id="contactForm" method="post">