Hey I'm beginner at Magento 2, and i don't know to much about UI component...

I'm creating a register form, and i want to pass Data of a UI Component Form to a Controller.

So i have a Form and i got a Button that i want to use it to get value from a dropdown field(combobox) of the Form.

I made the Block and the Controller, ok, the Block is calling the Controller right. But i don't know how to pass a specific value of the form to the controller. How can i do this?

I tried to use this command: $this->getRequest()->getParams(); but only returns ID and KEY.

And when i tried this command: $this->getRequest()->getPostValue(); it just returns an empty array...

Any help is appreciated !

DeleteHeader.php (Controller):

 public function execute()
    $resultRedirect = $this->resultRedirectFactory->create();

    $id = $this->getRequest()->getParam('id');


    $txt = 'DELETE HEADER : ' .  $id;
    $this->logger->log('DEBUG', $txt);

    return $resultRedirect->setPath('api/data/edit/id/' . $id);

DeleteHeader Block (Button):

public function getButtonData()
    $url = $this->getUrl("api/data/deleteheader", ['id' => $this->getDataId()]);
    return [
        'label' => __('Delete Header'),
        'class' => 'custom-button-class',
        'data_attribute' => [
            'mage-init' => [
                'button' => ['event' => 'deleteheader'],
        'on_click' => "confirmSetLocation(' Certeza ? ','" . $url . " ')",
        'sort_order' => 80,
  • did you eventually succeed? thanks for letting us your feedback Rafael Jul 1, 2020 at 8:27
  • Did you solve the issue? I have exactly the same behavior, params have only id and form_key without any other data from fields. Feb 24 at 17:38

2 Answers 2

$getParams = $this->getRequest()->getParam('myparam');

this is fine to use a get params. However your controller has to be a get controller class MyAction extends \Magento\Framework\App\Action\Action implements HttpGetActionInterface if you want to use get parameters.

I wrote a repository for you to take a look: https://bitbucket.org/magstaging/controllerwithjavascript/src/master/

  • Your repository is related to the frontend, It's strange(probably for me), but in frontend, I used something like request->getContent() instead of params or post value. It's not working for backend - getParams() or getPostValue() have id+form_key and empty respectively, getContent is empty as well. Feb 24 at 17:43

Use This in Your Controller File...

$post = $this->getRequest()->getPost();

Then You Can Use Form value using $post['your_field_name']

  • I tried this, it returns an empty array. Jun 26, 2020 at 12:16
  • plz share your code of controller file Jun 26, 2020 at 12:29
  • I updated, using this code, the only params that i can get are ID and Key Jun 26, 2020 at 12:54

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