How to get data from list of values (LOV) to be displayed in a text field ?

Question

Hi guys,
I am very new to Oracle APEX so please spare me if it is a silly question. How can I get the selected values from a set of list of values (LOV) displayed in a text field (or text area or so) ? Fox example, in my form I create 4 items: STATE, COUNTY, STREET, ZIPCODE and all of them are LOV (list of values). I also create 2 buttons (ADD & REMOVE). Then I create a test field (or text area name SELECTED RECORD). Now here is what I want to do with my form:
When I set the values for all 4 fields, I will click on the ADD button then I want those values be displayed in the text field.
For example, if the selected values are:
STATE = Alabama
COUNTY = Abbeville
STREET= 1 Street
ZIPCODE = 36310
And the ADD button is pressed. Then in the text field I want it displays like this:
Alabama,Abbeville,1 Street,36310
If I choose other values and click ADD again, a new line will be added into the text fields (text area). If I click the REMOVE button, then it will clear those two line in the text field.
Would it be possible to do it? Any help will be greatly appreciated. Thanks in advance.

Answer 1

If you can live with the page being submitted and refreshed, make your ADD button do a submit with a request value of ADD and make your REMOVE button do a submit with a request value of REMOVE.
Then create two computations (one firing with a condition of Request = ADD and the other firing with a condition of Request = REMOVE).
In the ADD one, concatenate the values together into the text area (most likely a PL/SQL computation wiill be what you want). In the REMOVE one, set it to null with a PL/SQL computation.
If you want it done without submitting the page, make the buttons each do a redirect to a URL but instead you will have to write two short javascript functions in the page HTML header to manipulate the field values. Each button would call each javascript function in an onclick event.