Message after redirect on order view page doesn't work

[itmultimobd453]

Hi,

I'm sending an custom email from the order view page. Basically I am calling a controller (which is based on the frontside - should it be made on admin side instead?), which sends an email and then redirects back to order view page where should show a success message. Everything is working except this message part.

I've checked countless threads and I can't figure out what I'm doing wrong.

Any help appreciated please.

Code below:

$resultRedirect = $this->resultFactory->create(ResultFactory::TYPE_REDIRECT);
try{
$this->messageManager->addSuccessMessage(__('Shipping Email sent successfully'));
}catch (\Exception $e) {
$this->messageManager->addErrorMessage($e->getMessage());
}
$resultRedirect->setUrl($this->_redirect->getRefererUrl());
return $resultRedirect;

[Sanjay Jethva · Accepted solution]

@itmultimobd453 

You just need to create a controller from the backend side and send mail from that!

[itmultimobd453]

HI, I tried that but I always get the secret key invalid error. Is there a better way to generate the key than $this->_backendUrl->getSecretKey? I saw some posts in which there's no key generated, just the url via $this->_backendUrl->getRouteUrl and it's supposed to work. 

However, both get me to the same error. And I don't want to disable the key for security reasons.

Any advice on this?

Thanks

[itmultimobd453]

Thanks, I managed to do the controller from admin and and it solved the message issue as well.