使H：panelGroup中点击，并发送回反复变 [英] Making h:panelGroup clickable, and send back repeated variable

问题描述

我需要点击一个 panelGrid中（男子已填充的对象列表中的一个），然后发送与它相关的支持bean的项目。

I need to make a panelGrid (one of man that are populated from a list of objects) clickable, and then send the item associated with it to the backing bean.

我的HTML，这样的：

My HTML so for:

<ui:repeat var="searchItem" value="#{bean.filteredSearchItems}" varStatus="searchResult">
    <h:panelGrid>
        <!-- I get some info here from the searchResult object -->
    </h:panelGrid>
    <f:ajax event="click" listener="{bean.clickFlight}" />
    <f:param name="lfi" value="#{searchResult.index}" />
</ui:repeat>

我知道（在我的支持bean），我需要 clickSearchItem（）称为函数，可以处理Ajax调用，所以要测试这一切，我做了按照我的支持bean：

I know that (in my backing bean) I need a function called clickSearchItem() that can handle the ajax call, so to test all of this, I did the following in my backing bean:

public void clickFlight()
{
    HttpServletRequest req = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest();
String lfi = req.getParameter("lfi");

if (lfi == null)
    log.info("LFI WAS RETURNED AS NULL :(");

    log.info("HOPEFULLY AN INDEX OF SOME SORT!: " + lfi);
}

没有什么是越来越记录 - 点击不登记。任何人都有这个问题吗？有谁知道如何解决这个问题？

Nothing is getting logged - the click doesn't register. Has anyone else had this problem? Does anyone know how to solve it?

推荐答案

在＆LT; F：AJAX＆GT; 需要嵌套到一个组件实施 ClientBehaviorHolder 。如果你打算使用＆LT; H：panelGrid的＆GT; （它生成一个HTML ＆LT;表＆gt; ）的是，那么你应该嵌套＆LT; F：。AJAX＆GT; 的组件本身

The <f:ajax> needs to be nested into a component implementing ClientBehaviorHolder. If you intend to use <h:panelGrid> (which generates a HTML <table>) for that, then you should be nesting the <f:ajax> in the component itself.

<h:panelGrid>
    <f:ajax event="click" listener="{bean.clickFlight}" />

    <!-- I get some info here from the searchResult object -->
</h:panelGrid>

在＆LT; F：参数＆GT; H; 仅是通过渲染＆LT承认：OUTPUTFORMAT＆GT; 和＆LT; H：commandXxx＆GT; 。前提是你要定位一个Servlet 3.0兼容的容器（Tomcat 7的，Glassfish的3，JBoss的6/7，等等），它因此支持EL 2.2，那么你可以把它作为方法的参数，而不是：

The <f:param> is only recognized by renderer of <h:outputFormat> and <h:commandXxx>. Provided that you're targeting a Servlet 3.0 compatible container (Tomcat 7, Glassfish 3, JBoss 6/7, etc) which thus supports EL 2.2, then you can just pass it as method argument instead:

<h:panelGrid>
    <f:ajax event="click" listener="{bean.clickFlight(searchResult.index)}" />

    <!-- I get some info here from the searchResult object -->
</h:panelGrid>

您甚至可以通过整个对象，如果preferred：

you can even pass the whole object if preferred:

<h:panelGrid>
    <f:ajax event="click" listener="{bean.clickFlight(searchResult)}" />

    <!-- I get some info here from the searchResult object -->
</h:panelGrid>

这是另一种，如果你需要＆LT; F：参数＆GT; 本身是使用＆LT; H：commandLink＆GT; 代替。

An alternative, if you need <f:param> per se, would be to use <h:commandLink> instead.

<h:commandLink>
    <f:ajax event="click" listener="{bean.clickFlight(searchResult)}" />
    <f:param name="lfi" value="#{searchResult.index}" />

    <h:panelGroup>
        <!-- I get some info here from the searchResult object -->
    </h:panelGroup>
</h:commandLink>

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