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listbox problem

have two listboxs and I populate the second accordingly to the selected items in the first listbox.And the method loading items in the second is called after a click which is fired by a command button.anyone have an idea how to do this?
[250 byte] By [listboxa] at [2007-11-27 8:13:55]
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# 1

check the following example-

<h:selectOneMenu onchange="submit();"

binding="#{bean.inputCountry}"

immediate="false" style="width: 100">

<f:selectItems value="#{bean.countryItems}"/>

</h:selectOneMenu>

<h:outputText value="City:"/>

<h:selectOneMenu binding="#{bean.inputCity}"

immediate="false" style="width: 120">

<f:selectItems value="#{bean.cities}"/>

</h:selectOneMenu>

Bean code-

private HtmlSelectOneMenu inputCountry, inputCity;

private SelectItem[] countryItems = new SelectItem[]{

new SelectItem("India"),

new SelectItem("U.S."),

};

private SelectItem[] indiacityItems = new SelectItem[]{

new SelectItem("Mumbai"),

new SelectItem("Bangalore"),

new SelectItem("Delhi"),

new SelectItem("Chennai"),

};

private SelectItem[] uscityItems = new SelectItem[]{

new SelectItem("San Fransico"),

new SelectItem("New York"),

new SelectItem("Washington"),

};

public SelectItem[] getCities()

{

String countryKey="India";

if (inputCountry.getValue() != null)

countryKey = inputCountry.getValue().toString();

if(countryKey.equals("India"))

return indiacityItems;

else

return uscityItems;

}

public HtmlSelectOneMenu getInputCity() {

return inputCity;

}

public void setInputCity(HtmlSelectOneMenu inputCity) {

this.inputCity = inputCity;

}

public HtmlSelectOneMenu getInputCountry() {

return inputCountry;

}

public void setInputCountry(HtmlSelectOneMenu inputCountry) {

this.inputCountry = inputCountry;

}

public SelectItem[] getCountryItems() {

return countryItems;

}

public void setCountryItems(SelectItem[] countryItems) {

this.countryItems = countryItems;

}

chitra_Ja at 2007-7-12 19:58:25 > top of Java-index,Enterprise & Remote Computing,Web Tier APIs...
# 2

Below is my code.i put it at prerender because i want item in first listbox based on previous page value.But i don't know how to loading items in the second listbox after a click which is fired by a command button.

public void prerender() {

try {

User[] userList = UserDAO.listUserByQuery(null,null);

Option[] optUser = new Option [userList.length];

int y = 0;

for (int i=0; i<userList.length; i++){

optUser [y] = new Option (String.valueOf(userList.getORMID()),userList.getFirstName());

if(userList.inCharge.contains(pInfo)){

this.listbox2.setItems(optUser);

}

else{

this.listbox1.setItems(optUser);

}

y++;

}

t.commit();>

listboxa at 2007-7-12 19:58:25 > top of Java-index,Enterprise & Remote Computing,Web Tier APIs...
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