如何在jsf2中使用h：command ajax刷新窗体外的元素？

Question

How can I refresh an element outside the form through ajax render .

<ui:repeat var="o">
    <h:form>
        <h:panelGroup id="someid">
       ...
        </h:panelGroup>

        <div>
            <h:commandButton action="#{o.doSomething}">
                <f:ajax event="action" render="someid :rehreshthistoo" />
            </h:commandButton>
        </div>
    <h:form>
</ui:repeat>

 <h:panelGroup id="rehreshthistoo">
       ...
 </h:panelGroup>

Answer 1

Your code looks fine. Although it would only work if the <h:panelGroup id="rehreshthistoo"> is not already by itself in another UINamingContainer component and also if you haven't changed the default JSF naming container separator of : to something else such as _ or - .

The ultimate answer should be found in the JSF-generated HTML source. Open the page in the browser, rightclick and View Source , locate the generated <span> element of <h:panelGroup id="rehreshthistoo"> in there and then use exactly its ID in your <f:ajax render> with the naming container separator as prefix. If it contains an auto-generated ID of some UINamingContainer parent, then you should give that parent component a fixed ID as well.

See also:

• Communication in JSF 2.0 - Ajax rendering of content outside form