在Primefaces中动态更改更新属性 [英] Change Update attribute dynamicaly in Primefaces

问题描述

我正在寻找一种在表单提交后从后备bean更改primefaces命令按钮的update属性的方法.我想要实现的是基于后备bean方法的结果来更新组件ID.

I am looking for a way to change the update attribute of a primefaces command button from the backing bean after the form submit. What i am trying to achieve is to update the component id's based on the results from backing bean method.

例如，我正在尝试使用命令按钮更新表单和咆哮消息，现在，如果后备bean发生了一些错误(不是验证错误)，我只需要更新咆哮消息，并且表单应该不会被更新.

For example, i am trying to update the form and the growl message with a command button, now if some error has happened from the backing bean(not validation error), i need to update only the growl message and the form shouldn't be updated.

<p:commandButton value="Finish Editing"
        action="#{editBean.finish}" icon="ui-icon-check"
        style="width:200px;margin-left:60px;" update=":studentEditForm   :messageForm:applyMessages" />

推荐答案

您可以通过

You can use the programmatic API via RequestContext#update().

public void finish() {
    // ...

    if (someCondition) {
         RequestContext.getCurrentInstance().update("someClientId");
    } else {
         RequestContext.getCurrentInstance().update("otherClientId");
    }
}             

别忘了从命令按钮中删除update属性.

Don't forget to remove the update attribute from the command button.

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