Which event should you use for rendering and updating dynamic data?

The "Render" event is the most appropriate choice for rendering and updating dynamic data within OutSystems applications. This event is specifically designed to handle operations that need to be executed right before the screen (or web block) is displayed to the user. This means any dynamic data you want to display should be processed during this event, allowing you to set or update values based on the most current data right before rendering occurs.

Using the Render event ensures that all calculations and data manipulations are completed, and the final output is ready to present at the moment the screen is shown. This makes it ideal for inserting dynamic elements that might change based on user interaction or other variables in the app.

While the other events mentioned, such as "Ready," "Destroy," and "After Fetch," serve their purposes in managing application state and lifecycle, they do not address the specific need for modifying the data right before it's shown to users. "Ready" is useful for initializing components, "Destroy" is for cleanup before navigation away, and "After Fetch" is aimed at handling data operations after data has been retrieved but does not directly facilitate rendering output.