Magento2: How to generate admin url with secure key from a controller

1. Add an instance of “\Magento\Framework\UrlInterface” in your calss and use that:

protected $urlBuider;
public function __construct(
    ....
    \Magento\Framework\UrlInterface $urlBuilder,
    ....
) {
    ....
    $this->urlBuilder = $urlBuilder;
    ....
}

Then you can use this:

$url = $this->urlBuilder->getUrl('url/path/here', $paramsHere = array());

It works for me !!!