How to add UI elements dynamically in the views of webdynpro

Question

Hi Experts,
Here i have a requirement where 2 text-box get added on a click of "ADD" button in the view during the execution of the Application. so is it possible to add the text-box to the view or not?
if yes how can it be done.
Thanks in advance
Regards
Lalitkumar.

Answer 1

Even with these expanded requirements I wouldn't necessarily recommend dynamic UI element creation in WDDOMODIFYVIEW.
If the UI element requirements are fairly static (2 text boxes for each push of the button), then consider using a Multi-Pane (http://help.sap.com/saphelp_nw70ehp1/helpdata/en/df/da8b412bb5b35fe10000000a1550b0/frameset.htm) or Row Repeater (http://help.sap.com/saphelp_nw70ehp1/helpdata/en/44/93d3792e8c60d6e10000000a114a6b/frameset.htm) UI element. These constructs will both create a series of UI elements based upon the number of context elements in a bound node.  Therefore if you want to generate two textboxes for each push of a button, in the button event handler you simple add another context element to the context node.  You don't need dynamic UI element creation or dynamic data binding.
If you feel that you must use dynamic UI element creation, then first read up on the WDDOMODIFYVIEW phase model event.
http://help.sap.com/saphelp_nw70ehp1/helpdata/en/d2/8acd409cc4dd50e10000000a1550b0/frameset.htm
You then probably want to study these three blogs on the topic:
/people/thomas.szcs/blog/2005/12/28/dynamic-programming-in-web-dynpro-abap--introduction-and-part-i-understanding-ui-elements
/people/thomas.szcs/blog/2006/01/03/dynamic-programming-in-web-dynpro-abap--part-ii-handling-viewelements
/people/thomas.szcs/blog/2006/02/22/dynamic-programming-in-web-dynpro-abap--part-iii-aggregations-and-ddic-binding-of-viewelements