What is the best order to provide an event handler for an ALV?

The best order to provide an event handler for an ALV (ABAP List Viewer) is to first write the event handler, then create the ALV, followed by registering for the event, and finally displaying the ALV.

Writing the handler first ensures that the necessary functionality is already in place before any events are triggered. This design approach is critical because it allows the event handler to respond appropriately to user actions in the ALV once it is created and displayed.

Creating the ALV next is a logical step since the event handler will need to interact with this ALV object. Once the ALV is set up, registering for the event will establish the connection between user interactions and the event handler, ensuring that when an event occurs, it can be handled by the pre-written logic.

Finally, displaying the ALV brings everything together and presents the user interface, which includes the ALV. By this point, the system is fully prepared to handle any events that the user might initiate.

This order promotes clean coding practices and ensures that all components are ready and accessible when needed, thus providing a smoother user experience while working with ALVs.