Question

我想编写ajax函数并将选择的值从select下拉菜单传递给bean。这就是我所拥有的：

<rich:select id="ctpMeasurementUnits"
    value="#{associationBean.selectedMruId}"
    defaultLabel="#{msg['classifier.select']}"
    requiredMessage="#{msg['classifier.measurementUnitRequire']}"
    validatorMessage="#{msg['common.selectIllegalValue']}">
        <f:selectItems
            value="#{measurementUnitsListBean.allMeasurementUnits}"
            var="mru" itemLabel="#{mru.mruName}" itemValue="#{mru.mruId}">
            <a4j:ajax event="change" execute="@this" listener="#{associationBean.onSelectChangeMru(mru)}" />
        </f:selectItems>
    <f:validateRequired />
    <rich:validator />
</rich:select>

然而，通过使用这段代码，我收到一个错误：

<a4j:ajax> Unable to attach <a4j:ajax> to non-ClientBehaviorHolder parent

问题：如何使用f:selectItems下拉菜单中的ajax函数？

Answer 1

你必须将a4j：ajax附加到rich：select not f：selectItems

<rich:select id="ctpMeasurementUnits"
value="#{associationBean.selectedMruId}"
defaultLabel="#{msg['classifier.select']}"
requiredMessage="#{msg['classifier.measurementUnitRequire']}"
validatorMessage="#{msg['common.selectIllegalValue']}">
    <f:selectItems
        value="#{measurementUnitsListBean.allMeasurementUnits}"
        var="mru" itemLabel="#{mru.mruName}" itemValue="#{mru.mruId}">        
    </f:selectItems>
  <f:validateRequired />
  <a4j:ajax event="change" execute="@this" listener="#{associationBean.onSelectChangeMru(mru)}" />
  <rich:validator />
</rich:select>

Answer 2

将其更改为

<f:ajax>

如果您想使用

<a4j:ajax> declare an <a4j:region> and write it down within it.

如何将<a4j：ajax>与<f：selectitems>一起使用

2 个答案: