AJAX渲染属性不与渲染工作=＆QUOT;假＆QUOT;零件

问题描述

我有，我想显示/隐藏组件，用户点击后，的commandButton 。

I have a component that I want to show/hide after user hits a commandButton.

是这样的：

<h:commandButton id="showButton" value="#{bean.wasPressed ? 'Hide' : 'Show'}">
    <f:ajax listener="#{bean.toggle()}" render="explanation showButton" />
</h:commandButton>

和

<h:panelGroup id="explanation" rendered="#{bean.wasPressed}">
    <h:outputText value="something" />
</h:panelGroup>

在 bean.toggle（）只是设置是pressed 属性为true或false适当。我使用＆LT; H：形式prependId =假＆GT;

The bean.toggle() simply sets the wasPressed property to true or false appropriately. I am using <h:form prependId="false">.

问题是我的按钮渲染属性的值。它明确地报名两种：解释和 showButton 。

The problem is the value of the render attribute of my button. It explicitly enlists both: explanation and showButton.

只要 showButton 总是present（它只是改变了它的标签），在解释为present只有当是pressed 属性为true。否则，它说：

As long as the showButton is always present (it only changes its label), the explanation is present only if the wasPressed property is true. Otherwise it says:

malformedXML：在更新：explanaition找不到

我该如何解决这个问题呢？

How can I solve this problem?

我想不会恢复到躲在源$ C ​​$ c中的元素，所以我想不使用任何jQuery的切换（ - ）或任何方式使用隐藏的元素风格= 显示：无或任何这方面的东西

I would like not to revert to hiding the element in the source code, so I would like not to use any jQuery toggle(-) or any way of hiding the element using style="display: none" or any of this stuff.

它甚至可以实现在JSF 2.1？

Is it even achievable in JSF 2.1?

推荐答案

您不能更新它们不会呈现，呈现=伪元素是一个JSF的方式来删除从DOM树中的元素，

You cannot update elements which are not rendered , rendered=false "is a JSF way to" to remove elements from the DOM Tree ,

它不喜欢的CSS显示：无或可见性：隐藏＆LT; - 这两人将保留的元素在DOM树，但隐藏的，而JSF呈现= FALSE甚至不会渲染（保持）在DOM树中的元素（你甚至不会看到它的页面的查看源文件）

its not like css display:none or visibility:hidden <- this two will keep the elements in the DOM tree but hidden , while the JSF rendered=false wont even render (keep) the element in the DOM tree (you wont even see it in the "view source" of the page)

所以，你如果你需要包装的panelGroup中与其他`panelGroup中'和更新包装的ID

So in you case you need to wrap the panelGroup with another `panelGroup' and update the id of the wrapper

<h:commandButton id="showButton" value="#{bean.wasPressed ? 'Hide' : 'Show'}">
    <f:ajax listener="#{bean.toggle()}" render="explanationWrapper showButton" />
</h:commandButton>


<h:panelGroup id="explanationWrapper">
    <h:panelGroup id="explanation" rendered="#{bean.wasPressed}">
        <h:outputText value="something" />
    </h:panelGroup>
</h:panelGroup>

还看类似的问题

also look at similar question

你能更新H：outputLabel从AP：阿贾克斯听众

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