How to get a TextBlock Text via Action.Http? - adaptive-cards

Question

I am trying to get TextBlock Text/Value ("Click Learn More to learn more about Actionable Messages!) in response when clicking Send Feedback.
I tried {{Heading.text}} and {{Heading.value}} with Heading being id of a field.
Adaptive Card
Getting value from Input.Text via {{feedbackText.value}} works just fine.
Sample:
{
"type": "AdaptiveCard",
"version": "1.0",
"hideOriginalBody": true,
"body": [
{
"type": "TextBlock",
"text": "Visit the Outlook Dev Portal",
"size": "Large"
},
{
"type": "TextBlock",
"text": "Click **Learn More** to learn more about Actionable Messages!",
"id": "Heading"
},
{
"type": "Input.Text",
"id": "feedbackText",
"placeholder": "Let us know what you think about Actionable Messages"
}
],
"actions": [
{
"type": "Action.Http",
"title": "Send Feedback",
"method": "POST",
"url": "https://webhook.site/.....",
"body": "{{feedbackText.value}}\n{{Heading.text}}\n{{Heading.value}}"
},
{
"type": "Action.OpenUrl",
"title": "Learn More",
"url": "https://learn.microsoft.com/outlook/actionable-messages"
}
],
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json"}
Thanks for help.

Answer 1

I had the same issue trying to send the value of the textblock in http body. I used the following workaround:
Created an Input.Number field
Set the Initially Visible property to false
When the Adaptive Card is compose, I used logic app/flow to populate the value of the field
The Action.Http was then set to the id.value value of the input box.