如何以编程AJAX更新在后台bean特定组件 [英] How to programmatically ajax-update specific component in backing bean

问题描述

有没有办法来AJAX的更新特定组件，如＆LT; H：形式GT; 在后台bean

Is there a way to ajax-update a specific component such as a <h:form> in backing bean?

我尝试以下使用<一个href="http://www.primefaces.org/docs/api/3.4/org/primefaces/context/RequestContext.html#execute%28java.lang.String%29"><$c$c>RequestContext#execute(),

I tried the following using RequestContext#execute(),

RequestContext context = RequestContext.getCurrentInstance();
context.execute("monitorVehicleForm.update()");

但似乎没有任何效果。

however that didn't seem to have any effect.

推荐答案

在的RequestContext＃的execute（）只是执行其被传入的任意JavaScript code作为参数。它不AJAX的更新组件的客户端重新presentation

The RequestContext#execute() only executes arbitrary JavaScript code which is been passed-in as argument. It does not ajax-update the client representation of the components.

您需要的<一个href="http://www.primefaces.org/docs/api/3.4/org/primefaces/context/RequestContext.html#update%28java.lang.String%29"><$c$c>RequestContext#update()而不是其中你只需把该待更新组件的客户端ID。

You need RequestContext#update() instead wherein you just pass the client ID of the to-be-updated component.

context.update("monitorVehicleForm");

这具有完全相同的效果＆LT;电话号码：commandXxx ...更新=monitorVehicleForm＆GT; 。这个工程提供出你那

This has exactly the same effect as <p:commandXxx ... update="monitorVehicleForm">. This works provided you've a

<h:form id="monitorVehicleForm">

没有任何<一href="http://docs.oracle.com/javaee/6/api/javax/faces/component/NamingContainer.html"><$c$c>NamingContainer亲和因此具有

without any NamingContainer parent and thus have a

<form id="monitorVehicleForm" name="monitorVehicleForm" ...> 

在生成的HTML。

• <一个href="http://stackoverflow.com/questions/8634156/how-to-reference-components-in-jsf-ajax-cannot-find-component-with-identifier/8644762#8644762">How引用组件的JSF AJAX？无法找到标识符QUOT组成部分;富＆QUOT;鉴于

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