I'm using the select component due to realizing a dynamic optgroup and option
It works rather fine but my problem is to get the selected value.
I tried to use an ajax behavior (AjaxComponentUpdatingBehavior,
OnChangeBehavior) but the onUpdate methode is never called --> doesn't work!

Maybe there is a solution for my problem!? What I'm doing wrong?

My code:

Select select = new Select(selectId);
select.add(new ListView("optGroups", myList) {

        protected void populateItem(ListItem item) {
        MyBean myBean = (MyBean) item.getModelObject();
        item.add(new OptGroup("optGroup", myBean.getName(), myBean.getList()));


class OptGroup extends SelectOption {

        String label;

        List<MyBean2> list;

        public OptGroup(String id, String label, List<MyBean2> list) {
                this.label = label;
                this.list = list;

        private void init() {
                this.add(new ListView("grpOptions", list) {

                protected void populateItem(ListItem item) {
                        MyBean2 myBean2 = (MyBean2) item.getModelObject();
                        item.add(new CustomSelectOption("grpOption", 


        protected void onComponentTag(final ComponentTag tag) {
             checkComponentTag(tag, "optgroup");
                        Select select = (Select) findParent(Select.class);
                        if (select == null) {
                                throw new WicketRuntimeException(
                                                "OptGroup component ["
                                                                + getPath()
                                                                + "] cannot 
find its parent Select. All OptGroup components must be
a child of or below in the hierarchy of a Select component.");

                tag.put("label", label);

public class CustomSelectOption extends SelectOption {
        public CustomSelectOption(String id, String displayValue) {
                super(id, new Model(displayValue));

        protected void onComponentTagBody(final MarkupStream markupStream, final
ComponentTag openTag) {
                replaceComponentTagBody(markupStream, openTag,

I tried this, but it doesn't work:

select.add(new AjaxFormComponentUpdatingBehavior("onchange") {
        protected void onUpdate(AjaxRequestTarget target) {
                System.out.println("Update ajax");
        // @todo updating model

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