Redirect after form submission

Question

I create custom Form in Drupal 8 ,I remember we can redirect to custom path in Drupal 7 with set $form_state['redirect'] = 'mycustompath'; in custom submit handler, but how can redirect User after Form submission in Drupal 8?

I know I should use submitForm method:

public function submitForm(array &$form, FormStateInterface $form_state)
{
   //submissions jobs ...
   //redirect path
}

Answer 1

In your "submitForm" method write below code

 $form_state->setRedirect('machine_name');
 return;

where machine_name is the machine name mentioned in the routing file.

I hope this helps .. :)

Answer 2

If you want to set at buildform you need to use some routing path like.

use Drupal\Core\Url;

$url = Url::fromRoute('route.path');
$form_state->setRedirectUrl($url);