first, you did not show all your code. second, there is too much code to
read through in an email and figure out whats wrong, create a quickstart
project. third, there is already an example that shows how to do this
properly: http://www.wicketstuff.org/wicket13/ajax/choice
-igor
On Sat, Oct 18, 2008 at 3:32 AM, overseastars <[EMAIL PROTECTED]> wrote:
>
> Any idea???I'm trapped by this problem......and no idea.....
>
>
>
> overseastars wrote:
> >
> > Hi all
> >
> > I'm having problems with using AjaxFormComponentUpdatingBehavior.
> > I'd like to make to ListChoices which contain a list of countries and
> > cities. For example, if I select one item in the first ListChoice and the
> > second ListChoice should display the related cities. Since I dont know
> how
> > to get some lists of cities, I just arbitrarily pick up one list to use.
> > the following is part of my code.
> >
> > My case is that it actually works when the frontpage is opened at the
> > first time. However, after the first click, the second doesnt work and
> > that getModelObjectAsString gives me null value. And if I refresh the
> > page, two lists both become empty.
> >
> > Could someone please help me out?? Thanks in advance. BTW, I also wanna
> > know how to get some lists of cities. :-DMany thanks..
> >
> >
> ************************************************************************************************************
> > private String countries;
> > private String countries1;
> >
> > private ListChoice countryListChoice;
> > private ListChoice countryListChoice1;
> > private List<String> tl;
> > private List<String> testlist;
> >
> > public SearchForm(String id) {
> > super(id);
> >
> > setModel(new CompoundPropertyModel(""));
> > tl = CountryListChoice.getCOUNTRIES();
> > testlist = CountryListChoice.getCOUNTRIES();
> > setOutputMarkupId(true);
> > CountryListChoice clc = new CountryListChoice();
> > countryListChoice = new ListChoice("countries", new
> PropertyModel(this,
> > "countries"), tl, clc.getRenderer());
> > countryListChoice.setOutputMarkupId(true);
> > add(countryListChoice);
> >
> > CountryListChoice clc1 = new CountryListChoice();
> > countryListChoice1 = new ListChoice("countries1", new
> > PropertyModel(this, "countries1"), testlist, clc.getRenderer());
> > countryListChoice1.setOutputMarkupId(true);
> > add(countryListChoice1);
> >
> > countryListChoice.add(new
> > MyAjaxFormComponentUpdatingBehavior("onChange"){
> >
> > /* (non-Javadoc)
> > * @see
> >
> com.smartbooking.wicket.component.MyAjaxFormComponentUpdatingBehavior#onUpdate(org.apache.wicket.ajax.AjaxRequestTarget)
> > */
> > @Override
> > protected void onUpdate(AjaxRequestTarget target) {
> > // TODO Auto-generated method stub
> > if(countryListChoice.getModelObject() !=
> null){
> > testlist.clear();
> > String c =
> countryListChoice.getModelObjectAsString();
> > System.out.println("\n\nour c : " + c +
> "\n\n");
> > testlist.add(c);
> > }else{
> > testlist.clear();
> > testlist.add("xing said null");
> > System.out.println("\n\n really
> null!!! \n\n");
> > }
> > target.addComponent(countryListChoice1);
> > }});
> > }
> > /**
> > * @return the countries
> > */
> > public String getCountries() {
> > return countries;
> > }
> >
> > /**
> > * @param countries the countries to set
> > */
> > public void setCountries(String countries) {
> > this.countries = countries;
> > }
> >
> > /**
> > * @return the countries1
> > */
> > public String getCountries1() {
> > return countries1;
> > }
> >
> > /**
> > * @param countries1 the countries1 to set
> > */
> > public void setCountries1(String countries1) {
> > this.countries1 = countries1;
> > }
> >
> >
>
> --
> View this message in context:
> http://www.nabble.com/AjaxFormComponentUpdatingBehavior-problem-tp20032008p20045781.html
> Sent from the Wicket - User mailing list archive at Nabble.com.
>
>
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