Hi!
No the form is submitted (because a ValueChangeListener needs this)
With the following I display the same page again, but this time with the new
items in the second selectbox:
if (event.getComponent().getId()
> .equalsIgnoreCase("newpartnerMandanten")) {
> String viewId = "/newpartner.jsp";
> FacesContext context =
> FacesContext.getCurrentInstance();
> UIViewRoot view =
> context.getApplication().getViewHandler()
> .createView(context, viewId);
> view.setViewId(viewId);
> context.setViewRoot(view);
> context.renderResponse();
-----Ursprüngliche Nachricht-----
Von: Mike Duffy [mailto:[EMAIL PROTECTED]
Gesendet: Mittwoch, 14. Dezember 2005 19:34
An: MyFaces Discussion
Betreff: Re: AW: Dynamic Drop Down Lists
Thx Andreas.
When you make a change in the first select box, does the change automatically
propogate to second
selectbox without submitting the form (or does the change just affect the
component tree)?
Mike
--- [EMAIL PROTECTED] wrote:
> HI Mike!
>
> I have done it with a ValueChangeListener, it works fine.
> I get my Values for the BOX from the Database, because I have to update them
> very quickly. So
> I'm not sure, if you will do that yourself.
>
> Here is my code, perhaps it helps you:
>
>
> <!--FIRST SELECTBOX-->
> <h:selectOneMenu id="mandanten" styleClass="show"
> value="#{searchDto.mandant}"
> valueChangeListener="#{linker.listnewStandortsForSearch}"
> onchange="submit()" rendered="#{searchDto.showAlleAnzeigenMandant}" >
> <f:selectItem itemValue="#{searchDto.nullwert}" itemLabel="#{msg.alle}"
> />
> <f:selectItems value="#{queryHelper.mandanten}"/>
> </h:selectOneMenu>
>
> <!--SECOND SELECTBOX: DEPENDS ON FIRST SELECTBOX-->
> <h:selectOneMenu id="standorte" styleClass="show"
> value="#{searchDto.standort}"
> rendered="#{searchDto.showAlleAnzeigenStandort}">
> <f:selectItem itemValue="#{searchDto.nullwert}" itemLabel="#{msg.alle}"
> />
> <f:selectItems value="#{queryHelper.standorte}"/>
> </h:selectOneMenu>
>
> //HERE IS THE VALUECHANGEMETHOD:
>
> public void listnewStandortsForSearch(ValueChangeEvent event) {
>
> qh = (QueryHelper) FacesUtil.getManagedBean("queryHelper");
> searchDto = (SearchDto) FacesUtil.getManagedBean("searchDto");
> Long newvalue = null;
>
> // Überprüfung ob Wert der Mandanten Combobox einen anderen
> Wert als 0
> // (=Alle Anzeigen) liefert
> if (((Long) event.getNewValue()).compareTo(new Long(0)) != 0) {
> newvalue = (Long) event.getNewValue();
> searchDto.setMandant(newvalue);
>
> }
> else {
> searchDto.setMandant(new Long(0));
> }
>
> //CALL METHOD WHICH TAKES THE VALUES FOR THE 2nd BOX OUT OF THE
> DATABASE, DEPENDING ON THE
> SELECTION OF THE FIRST BOX.
> try {
> qh.liststandorts(newvalue);
> }
> catch (Exception e) {
> // TODO Auto-generated catch block
> e.printStackTrace();
> }
>
>
> //NOT SO INTERESSTING FOR YOU:
> if (event.getComponent().getId()
> .equalsIgnoreCase("newpartnerMandanten")) {
> String viewId = "/newpartner.jsp";
> FacesContext context =
> FacesContext.getCurrentInstance();
> UIViewRoot view =
> context.getApplication().getViewHandler()
> .createView(context, viewId);
> view.setViewId(viewId);
> context.setViewRoot(view);
> context.renderResponse();
> }
> else {
> String viewId = "/search.jsp";
> FacesContext context =
> FacesContext.getCurrentInstance();
> UIViewRoot view =
> context.getApplication().getViewHandler()
> .createView(context, viewId);
> view.setViewId(viewId);
> context.setViewRoot(view);
> context.renderResponse();
> }
>
> }
>
> -----Ursprüngliche Nachricht-----
> Von: Mike Duffy [mailto:[EMAIL PROTECTED]
> Gesendet: Mittwoch, 14. Dezember 2005 09:37
> An: [email protected]
> Betreff: Dynamic Drop Down Lists
>
>
> Is there any way to create dynamic drop down lists in JSF without using AJAX?
>
> Without JSF there are JavaScript techniques that can be used to dynamically
> change a drop down
> list (e.g., based on the selection of drop down list A, the values ion drop
> down list B are
> populated by an onclick function),
>
> However, with JSF, the changes made in JavaScript do not correspond to the
> values in the
> component
> tree on the server, so an error is thrown. I've tried to update the
> component through a
> "valueChangeListener", but this also generates an error.
>
> Has anyone found a way to do this in JSF? Can you send a link with an
> example? I Googled with
> no
> success.
>
> Thx.
>
> Mike
>
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