Trouble setting the session state of a select item.

Question

Hi,
I have a requirement whereby I need to change the session state of a select list item in my form without the need to submit. I am using Application Express 4.1.0.00.32. I thought this would be straight forward using a dynamic action or javascript and calling an on demand process for example.
P1_MY_SELECT onchange="set_option();"
function set_option() {
var l_option=$f_SelectValue('P1_MY_SELECT');
alert( 'My new value is ' + l_option );
// ON DEMAND Set the new session state value
var lRequest = new apex.ajax.ondemand
('SET_P1_MY_SELECT',function()
{  /* start the return function */
var l_s = p.readyState;
if(l_s == 1||l_s == 2||l_s == 3)
else if(l_s == 4)
{ gReturn = p.responseText;
     (gReturn)?json_SetItems(gReturn):null;
else{return false;}
/* end the return function */
lRequest.ajax.addParam('x01', l_option );
lRequest._get()
My on demand application process
DECLARE
l_options varchar2(2000) := wwv_flow.g_x01;
BEGIN
APEX_UTIL.SET_SESSION_STATE('P1_MY_SELECT',l_options);
apex_util.json_from_items('P1_MY_SELECT');
END;
Is there a better method to set the session state of my P1_MY_SELECT other than what I am doing as above or can you tell me why the session state of P1_MY_SELECT is not changed?
Thanks.
Edited by: 968358 on 01-Nov-2012 08:40

Answer 1

if you are on 4.1 why don't you use a dynamic action instead of writing the code again?
create a dynamic action like this
Event: Change
Source Type: Item
Item: P1_MY_SELECT
True Action:
=========
Action: Execute Plsql Code
Plsql Code: null;
Page Items to Submit: P1_MY_SELECT
Page Items to Return: P1_MY_SELECT (this is optional)
http://docs.oracle.com/cd/E23903_01/doc/doc.41/e21674/advnc_dynamic_actions.htm#HTMDB27020