How do you do post item validations or calculations?

Question

In Oracle Forms, you can use Post Item triggers or When Validate Item triggers to validate data or do calculations as you move out of a form field. How can I do the same in Apex?

Answer 1

In Forms you can run PL/SQL code on both the client and the server, and the client trigger code can seamlessly access server PL/SQL program units and the state of the database session through its dedicated, always-on connection. With APEX things are different. The client (browser) only runs JavaScript and the server only runs PL/SQL; their session states are entirely separate; and they can only communicate through transient, stateless HTTP requests.
In this case, your dynamic action code has executed, but as it's PL/SQL it executes on the server and only affects server session state. (You can check this by reviewing session state&mdash;if the session state reflects no change, ensure the Page Items to Submit dynamic action setting includes <tt>P36_AMTRQ</tt>.)
If you require the action to execute in the browser then it needs to execute JavaScript code:
var amt = parseFloat($v("P36_AMTRQ")) * .0025;
$s("P36_FFEDU", amt);
$s("P36_CFEDU", amt);Page events, JavaScript and server PL/SQL programming can be combined using AJAX techniques to run code in the database and return the results to the page without page submission and rendering. htmldb_Get() Documentation vs Real Life.