更新< f:ajax>之外的组件组件的上下文 [英] Updating a component outside of the <f:ajax> component's context
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问题描述
是否可以让JSF更新放置在组件上下文之外的组件?
Is it possible to have the JSF update a component that's placed outside the component's context?
当前以下页面无法正常工作:
Currently the following page is not working:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<h:head>
<title>Welcome</title>
</h:head>
<h:body>
<p><h:outputText id="out" value="#{user.greeting}" /></p>
<h:form id="form1">
<h:inputText value="#{user.name}" id="user-name" />
<p><h:inputSecret value="#{user.password}" id="password" /></p>
<p>
<h:commandButton value="Login" id="login-button">
<f:ajax execute="user-name password" render="out" />
</h:commandButton>
</p>
</h:form>
</h:body>
</html>
我知道，如果将#out组件放入<h:form>内，则页面将正确显示.但是有没有办法将#out组件放置在表单之外(例如，现在所在的位置)?
I know that if I put the #out component inside <h:form> the page will be rendered correctly. But is there a way to place the #out component outside of the form (e.g. where it is right now)?
推荐答案
已解决！可以将out称为:out.这样，findComponent从视图根开始搜索它.所以这是可行的解决方案:
Solved! It is possible to refer to out as :out. In this way findComponent searches for it starting from the view root. So here's the working solution:
<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core">
<h:head>
<title>Welcome</title>
</h:head>
<h:body>
<p><h:outputText id="out" value="#{user.greeting}" /></p>
<h:form id="form1">
<h:inputText value="#{user.name}" id="user-name" />
<p><h:inputSecret value="#{user.password}" id="password" /></p>
<p>
<h:commandButton value="Login" id="login-button">
<f:ajax execute="user-name password" render=":out" />
</h:commandButton>
</p>
</h:form>
</h:body>
</html>
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