如何更新从备用Bean生成的ID [英] How to update id generated from a backing bean

问题描述

<p:outputPanel>
    <h:selectOneRadio value="#{myBean.favColor1}">
  <f:selectItem itemValue="Red" itemLabel="Color1 - Red" />
  <f:selectItem itemValue="Green" itemLabel="Color1 - Green" />
  <f:selectItem itemValue="Blue" itemLabel="Color1 - Blue" />
    </h:selectOneRadio>
    <p:ajax update="picker,#{myBean.clientId}"/>
</p:outputPanel>

我需要更新其ID是通过编程生成的组件.

I need to update a component whose id is generated programmatically.

推荐答案

客户端ID应该以默认的命名容器分隔符:为前缀，以便将其绝对解析为UIViewRoot而不是相对于父命名容器(适用于组件ID，但不适用于客户端ID).

The client ID should be prefixed with the default naming container separator character : so that it will be resolved absolute to the UIViewRoot instead of relative to the parent naming container (which will work for component IDs, but not for client IDs).

<p:ajax update="picker,:#{myBean.clientId}"/>

作为另一种完全不同的选择(我发现将客户端ID绑定到非常痒的后备bean)，只需将组件绑定到视图并引用它即可，而不是通过中间托管bean.

As a completely different alternative (I find binding the client ID to a backing bean pretty itchy), just bind the component to the view and reference it instead of through an intermediary managed bean.

<h:someComponent binding="#{foo}" />
...

<p:ajax update="picker,:#{foo.clientId}"/>

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