Thanks Fatih. It is my fault, i solved the problem.
Altug.
2009/10/9 Fatih Mehmet Ucar <fmu...@gmail.com>
> If you use the below constrcutor, it should solve your problem.
>
> DropDownChoice(java.lang.String id, IModel model, IModel choices,
> IChoiceRenderer renderer)
>
>
>
> 2009/10/9 Altuğ B. Altıntaş <alt...@gmail.com>:
> > Hi;
> > I have a problem with DropDownChoice; The code block is here :
> >
> > List<Faaliyet>faaliyetListesi = // data comes
> >
> > final DropDownChoice<Faaliyet> faaliyetler =
> > new DropDownChoice<Faaliyet>("Faaliyetler",
> > new Model((Serializable) faaliyetListesi),
> > faaliyetlerRenderer) {
> >
> > @Override
> > protected boolean
> wantOnSelectionChangedNotifications()
> > {
> > return true;
> > }
> >
> > @Override
> > protected void onSelectionChanged(Faaliyet
> newSelection)
> > {
> > super.onSelectionChanged(newSelection);
> > PageParameters params = new PageParameters();
> > params.add("ay", finalAy + "");
> > params.add("yil", finalYil + "");
> > params.add("faaliyetId", newSelection.getId() +
> "");
> > setResponsePage(ActionPage.class, params);
> >
> > }
> > };
> >
> >
> > add(faaliyetler);
> >
> >
> >
> > The error message is :
> >
> > wicketMessage: Method onSelectionChanged of interface
> > org.apache.wicket.markup.html.form.IOnChangeListener targeted at
> > component [MarkupContainer [Component id = Faaliyetler]] threw an
> > exception
> >
> > Root cause:
> >
> > java.lang.IllegalStateException: Attempt to set model object on null
> > model of component: Faaliyetler
> > at
> org.apache.wicket.Component.setDefaultModelObject(Component.java:3038)
> > at
> org.apache.wicket.markup.html.form.FormComponent.updateModel(FormComponent.java:1168)
> > at
> org.apache.wicket.markup.html.form.DropDownChoice.onSelectionChanged(DropDownChoice.java:158)
> > at java.lang.reflect.Method.invoke(Method.java:597)
> > at
> org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:182)
> > at
> org.apache.wicket.request.target.component.listener.ListenerInterfaceRequestTarget.processEvents(ListenerInterfaceRequestTarget.java:73)
> > at
> org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.j
> >
> > --
> >
> > Any suggestions ?
> >
> > Altuğ.
> >
>
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>
--
Altuğ.
