get selected list of a shuttle to a textfield

how to get selected list of a shuttle to a textfield(comma seperated) in apex?

And we Said...

You can do it with the help of dynamic action.

   

Create a dynamic action on the onchange event of your shuttle item (say P1_SHUTTLE) to get the select values in text item (say P1_TEXT) as follows:

     Name : give a proper name

     Event : Change

     Selection Type : Item(s)

     Item(s) : P1_SHUTTLE (select your shuttle item)

     Condition : is not null

     Action : Execute PL/SQL Code

     Fire on Page Load : No

     PL/SQL Code

1. BEGIN  
2.   :P1_TEXT := REPLACE(:P1_SHUTTLE,':',',');  
3. END;  

     Page Items to Submit: P1_SHUTTLE

     Page Items to Return: P1_TEXT

Reference :https://community.oracle.com/thread/3786337