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 RequestContext#update() .
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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