如何以编程方式对支持 bean 中的特定组件进行 ajax 更新
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How to programmatically ajax-update specific component in backing bean
提问by Venkat Maridu
Is there a way to ajax-update a specific component such as a <h:form>in backing bean?
有没有办法 ajax 更新特定组件，例如<h:form>支持 bean？
I tried the following using RequestContext#execute(),
我尝试了以下使用RequestContext#execute()，
RequestContext context = RequestContext.getCurrentInstance();
context.execute("monitorVehicleForm.update()");
however that didn't seem to have any effect.
然而，这似乎没有任何效果。
回答by BalusC
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.
在RequestContext#execute()仅执行其中被传入作为参数任意JavaScript代码。它不会对组件的客户端表示进行 ajax 更新。
You need RequestContext#update()instead wherein you just pass the client ID of the to-be-updated component.
RequestContext#update()相反，您需要在其中传递要更新的组件的客户端 ID。
context.update("monitorVehicleForm");
This has exactly the same effect as <p:commandXxx ... update="monitorVehicleForm">. This works provided you've a
这与<p:commandXxx ... update="monitorVehicleForm">. 只要你有一个
<h:form id="monitorVehicleForm">
without any NamingContainerparent and thus have a
没有任何NamingContainer父母，因此有一个
<form id="monitorVehicleForm" name="monitorVehicleForm" ...>
in the generated HTML.
在生成的 HTML 中。
