Render multiple components with f:ajax

问题

The wrong codes are:

<h:form id="search_form">
<h:commandButton class="button" value="View" action="#{InfoBean.search}">
    <f:ajax execute="search_form" render="linear1"></f:ajax>
    <f:ajax execute="search_form" render="linear2"></f:ajax>
</h:commandButton>
<p:lineChart id="linear1" value="#{InfoBean.linearModel1}" legendPosition="e"/>
<p:lineChart id="linear2" value="#{InfoBean.linearModel2}" legendPosition="e"/>
</h:form>

What I want to do is when I click on the commandButton, I want to refresh those two charts. But now I used two <ajax> tags, of which the second doesn't work.

So how can I use ajax to render two charts?

回答1:

You can render multiple components with single f:ajax. Just make sure all individual components you want to update have an id. In your sample it would be something like:

<f:ajax execute="search_form" render="linear1 linear2"/>

Where the IDs need to be separated by just whitespace like linear1 linear2 and not commaseparated like linear1, linear2 (that works only in p:ajax).

See also:

• Understanding PrimeFaces process/update and JSF f:ajax execute/render attributes
• How to find out client ID of component for ajax update/render? Cannot find component with expression "foo" referenced from "bar"

回答2:

For a4j jsf use ',': <a4j:support event="onchange" reRender="parent,child1,child2" />

来源：https://stackoverflow.com/questions/16597542/render-multiple-components-with-fajax