H：selectManyChexkbox`s＆LT; F：Ajax事件=＆QUOT;按一下[听者不火，并给出了一个错误 [英] h:selectManyChexkbox`s <f:ajax event="click" listener doesn't fire and gives an error

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问题描述

我想，当用户选择/取消选择一些在H火灾事件变化监听器：selectManyCheckbox，如果离开它单独什么都不发生。

我的XHTML：

 ＆LT;！DOCTYPE HTML PUBLIC -  // W3C // DTD XHTML 1.0过渡// EN
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

＆LT; HTML LANG =EN的xmlns =htt​​p://www.w3.org/1999/xhtml
的xmlns：UI =htt​​p://java.sun.com/jsf/facelets
的xmlns：H =htt​​p://java.sun.com/jsf/html
的xmlns：F =htt​​p://java.sun.com/jsf/core
的xmlns：C =htt​​p://java.sun.com/jsp/jstl/core＆GT;

＆LT; H：头＆GT;
＆LT;链接相对=样式类型=文本/ CSS
    HREF =/ juritest /资源/ CSS / style.css文件/＆GT;
＆LT;脚本类型=文/ JavaScript的
    SRC =/ juritest /资源/ JS / jQuery的-1.8.2.js＆GT;＆LT; / SCRIPT＆GT;
＆LT;脚本类型=文/ JavaScript的SRC =/ juritest /资源/ JS / menu.js档案＆GT;＆LT; / SCRIPT＆GT;
＆LT; / H：头＆GT;

＆LT; H：身体GT;
＆LT;用户界面：作文模板=../../模板/ gridsTemplate.xhtml＆GT;
    ＆LT; UI：定义名称=内容＆GT;
        ...
                ＆LT; H：panelGroup中风格=文本对齐：左＆GT;
                    ＆LT;小时/＆GT;
                    ＆所述; H：selectManyCheckbox
                        值=＃{gridPopUpBean.oneQuestionUserAnswers}
                        布局=pageDirection＆GT;
                        ＆LT; F：选择信息itemValue =A
                            itemLabel =＃{gridPopUpBean.currentQuestion.a}/＆GT;
                        ＆LT; F：选择信息itemValue =B
                            itemLabel =＃{gridPopUpBean.currentQuestion.b}/＆GT;
                        ＆LT; F：选择信息itemValue =C
                            itemLabel =＃{gridPopUpBean.currentQuestion.c}/＆GT;
                        ＆LT; F：Ajax事件=点击监听器=＃{gridPopUpBean.changeListener（）}/＆GT;
                    ＆LT; / H：selectManyCheckbox＆GT;
                ＆LT; /小时：panelGroup中＆GT;
   ...

我得到一个错误说一个或多个资源具有'头'的目标，但没有头组件已在视图中定义的。我有＆LT; H：头部>不仅仅是＆LT;头，我读了，这是一个可能的问题。

和从bean的片段：

 公共无效的ChangeListener（ValueChangeEvent E）{

    改变=真;
}

我已经试过无＆LT; F：AJAX像

 ＆LT; H：selectManyCheckbox
                        值=＃{gridPopUpBean.oneQuestionUserAnswers}valueChangeListener =＃{gridPopUpBean.changeListener（）}的onclick =提交（）
                        布局=pageDirection＆GT;
                        ＆LT; F：选择信息itemValue =A
                            itemLabel =＃{gridPopUpBean.currentQuestion.a}/＆GT;
                        ＆LT; F：选择信息itemValue =B
                            itemLabel =＃{gridPopUpBean.currentQuestion.b}/＆GT;
                        ＆LT; F：选择信息itemValue =C
                            itemLabel =＃{gridPopUpBean.currentQuestion.c}/＆GT;
                        ＆LT; F：Ajax事件=点击监听器=＃{gridPopUpBean.changeListener（）}/＆GT;
                    ＆LT; / H：selectManyCheckbox＆GT;

但没有运气...

解决方案
  

一个或多个资源具有'头'的目标，但没有头组件已在视图中定义的我有＆LT; H：头不只是＆LT; HEAD>，我读了这是一个可能的问题。的

之外＆LT任何东西; UI：组合物＆gt; 是忽略。如果你需要一个＆LT; H：头＆GT; ，它需要去主模板中的 gridsTemplate.xhtml （或任何其父模板）。

另外，如果你没有使用一个可视化编辑器为您的XHTML文件（像Dreamweaver），那么我强烈建议停止把任何内容外＆LT; UI：组合物＆gt; ，<一个href="http://stackoverflow.com/questions/15991653/javascript-does-not-work-under-jsf-template-again">otherwise你把自己的困惑。

参见：

  • <一个href="http://stackoverflow.com/questions/4792862/how-to-include-another-xhtml-in-xhtml-using-jsf-2-0-facelets/4793959#4793959">How使用JSF 2.0 Facelets的包括另外XHTML在XHTML？ 

 ＆LT; F：Ajax事件=点击监听器=＃{gridPopUpBean.changeListener（）}/＆GT;

公共无效的ChangeListener（ValueChangeEvent E）{

你混淆 valueChangeListener 与＆LT; F：AJAX收听GT; 。该 ValueChangeEvent 的说法只适用于 valueChangeListener 的 UIInput 组件。摆脱这样的说法的。

 公共无效的ChangeListener（）{

参见：

  • <一个href="http://stackoverflow.com/questions/11879138/when-to-use-valuechangelistener-or-fajax-listener/11883021#11883021">When使用valueChangeListener或f：ajax的听众

无关的具体问题，您正确使用点击（尽管你可以放心地完全忽略它），但是你的问题的标题提到变更键，这确实是错误的事件复选框和单选按钮。

参见：

  • <一个href="http://stackoverflow.com/questions/7886453/what-values-can-i-pass-to-the-event-attribute-of-the-fajax-tag/7889098#7889098">What值我可以传递给f的事件属性：AJAX标记
    • ？

I want to fire an event change listener when the user selects / deselects something in the h:selectManyCheckbox, if it leaves it alone nothing should happen.

My xhtml:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html lang="en" xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:c="http://java.sun.com/jsp/jstl/core">

<h:head>
<link rel="stylesheet" type="text/css"
    href="/juritest/resources/css/style.css" />
<script type="text/javascript"
    src="/juritest/resources/js/jquery-1.8.2.js"></script>
<script type="text/javascript" src="/juritest/resources/js/menu.js"></script>
</h:head>

<h:body>
<ui:composition template="../../templates/gridsTemplate.xhtml">
    <ui:define name="content">
        ...
                <h:panelGroup style="text-align: left">
                    <hr />
                    <h:selectManyCheckbox
                        value="#{gridPopUpBean.oneQuestionUserAnswers}" 
                        layout="pageDirection">
                        <f:selectItem itemValue="a"
                            itemLabel="#{gridPopUpBean.currentQuestion.a}" />
                        <f:selectItem itemValue="b"
                            itemLabel="#{gridPopUpBean.currentQuestion.b}" />
                        <f:selectItem itemValue="c"
                            itemLabel="#{gridPopUpBean.currentQuestion.c}" />
                        <f:ajax event="click" listener="#{gridPopUpBean.changeListener()}"/>
                    </h:selectManyCheckbox>
                </h:panelGroup>
   ...

I get an error saying "One or more resources have the target of 'head', but no 'head' component has been defined within the view." I have < h:head> not just < head>, I read that this was a possible problem.

And the snippet from the bean:

public void changeListener(ValueChangeEvent e) {

    change = true;
}

I have tried without < f:ajax like 

<h:selectManyCheckbox
                        value="#{gridPopUpBean.oneQuestionUserAnswers}" valueChangeListener="#{gridPopUpBean.changeListener()}" onclick="submit()"
                        layout="pageDirection">
                        <f:selectItem itemValue="a"
                            itemLabel="#{gridPopUpBean.currentQuestion.a}" />
                        <f:selectItem itemValue="b"
                            itemLabel="#{gridPopUpBean.currentQuestion.b}" />
                        <f:selectItem itemValue="c"
                            itemLabel="#{gridPopUpBean.currentQuestion.c}" />
                        <f:ajax event="click" listener="#{gridPopUpBean.changeListener()}"/>
                    </h:selectManyCheckbox>

but with no luck...

解决方案

One or more resources have the target of 'head', but no 'head' component has been defined within the view." I have < h:head> not just < head>, I read that this was a possible problem.

Anything outside <ui:composition> is ignored. If you need a <h:head>, it needs to go in the master template, the gridsTemplate.xhtml (or any of its parent templates).

Further, if you aren't using a visual editor for your XHTML files (like Dreamweaver), then I strongly recommend to stop putting any content outside <ui:composition>, otherwise you keep confusing yourself.

See also:

<f:ajax event="click" listener="#{gridPopUpBean.changeListener()}"/>

public void changeListener(ValueChangeEvent e) {

You're confusing valueChangeListener with <f:ajax listener>. The ValueChangeEvent argument is only applicable to valueChangeListener attribute of an UIInput component. Get rid of that argument.

public void changeListener() {

See also:

Unrelated to the concrete problem, you correctly used click (although you could safely omit it altogether), but your question title mentions change and that is indeed the wrong event for a checkbox and radio button.

See also:

这篇关于H：selectManyChexkbox`s＆LT; F：Ajax事件=＆QUOT;按一下[听者不火，并给出了一个错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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