Adaptive Cards: Visibility of element depending on value of a ChoiceSet - adaptive-cards

Question

I am trying to show TextBlock elements on my adaptive card depending in the value selected in a ChoiceSet (radio buttons). And I am not getting it to work properly.
The ChoiceSet does not have an ActionSet integrated, so I cannot call a ToggleVisibility action on selection. Then I tried to use the selectAction Property, but neither the Input.ChoiceSet nor Input.Choice support this property.
The last approach was to use the "$when" property on the element I want to toggle and bind it to the value of the ChoiceSet. Depending on which value it has, the element should be shown or hidden. But I do not get it to work, I tried
"$when": "{damagepart=2}" but it seems that only works with some kind of data binding?!
I am not able to find a proper example of that in the decumentation or in the samples of adaptivecards.io...
Does anyone have an example or some hints on how to get this task solved?

Answer 1

While this can theoretically be done in Web Chat using the extensibility features of Adaptive Cards, you may also not that this feature is in the Adaptive Cards roadmap: https://portal.productboard.com/adaptivecards/1-adaptive-cards-features/c/25-client-side-update-card-upon-input-changes-or-button-presses

Answer 2

I made this example that might be useful for you.
The column section that contain a text box and a action hyperlink will hide and show depending on the condition or the value of the variable.
card payload editor
{
"type": "AdaptiveCard",
"$schema": "http://adaptivecards.io/schemas/adaptive-card.json",
"version": "1.5",
"body": [
{
"type": "ColumnSet",
"columns": [
{
"type": "Column",
"width": "stretch",
"items": [
{
"type": "TextBlock",
"text": "This line will visible when the condition meet:",
"wrap": true
},
{
"type": "ActionSet",
"actions": [
{
"type": "Action.OpenUrl",
"title": "Any button you want to show"
}
]
}
]
}
],
"$when": "${$root.MatchVariableValue == \"yes\"}"
}
]
}
use the following sample on Data editor to see how the section appear and hide depending on your input/value.
{"MatchVariableValue":"yes"}
or use
"$when": "${$root.MatchVariableValue}"
if your data is as simple as
{"MatchVariableValue":true}