Trigger and handle event on selecting any dropdown option in adaptive card.

Question

We have created an Adaptive Card that includes a dropdown, which is rendered within a task module. When a user selects a value from the dropdown, we want to make external API calls (without any actionable buttons) and display the results in the task module.

Are there ways to achieve this use case?

Answer 1

Task modules can be invoked from tabs, bots, or deep links. Invoking a task module directly from a dropdown selection is not currently supported, you cannot display the result in the task module after selecting value from dropdown.
This is byDesign behaviour.
Ref Doc: https://learn.microsoft.com/en-us/microsoftteams/platform/task-modules-and-cards/task-modules/invoking-task-modules