h:graphicImage无法重新渲染 [英] h:graphicImage not reRender

问题描述

我有一个jsf文件，其中有selectOneMenu和ah:graphicImage.现在的问题是当我通过selectOneMenu发送onchange请求并想重新渲染h:graphicImage并想在动作bean中显示和隐藏布尔值时.适当地.首先我非常仔细地研究它，当我通过selectOneMenu发送动作时，在Bean中正确设置了布尔值，但没有正确设置reRender值.如果刷新页面，那么它将正常工作.如果我想刷新页面，任何可以解决它的人在selectOneMenu actionlistener上，然后刷新页面.有关详细信息，请参见我的代码

i have a jsf file where i have selectOneMenu and a h:graphicImage.Now the problem is when i send onchange request through selectOneMenu and want to reRender the h:graphicImage and want to show and hide boolean in action bean.But not work properly. Actully first i investigate it very carefully that when i send action through selectOneMenu the boolean value set correctly in bean but not set the reRender value properly.If i refresh page then it work properly.Anyone who i can solve it if i want to refresh page on selectOneMenu actionlistener then how i refresh page.My code is here for more detail

    <h:selectOneMenu id="stageListID" value="#{mnpBean.stageList.defaultValue}" >
<f:selectItems  value="#{mnpBean.stageList.values}"/>
<a4j:support event="onchange" actionListener="#{mnpAction.onStageListChangeAction}" reRender="addBtn1" oncomplete="resetViewConfigs();"/>
</h:selectOneMenu>

图形图像代码

<h:graphicImage id="addBtn1"  url=""  rendered="#{mnpBean.showAddButton}" style="cursor:pointer">
<a4j:support id="addRowBtn1" event="onclick"  actionListener="#{mnpAction.addMultiNoRingFence}"/>
</h:graphicImage> 

此处有Bean代码

public void onStageListChangeAction(ActionEvent ae) {
mnpBean = getMNPBean();
if ("10".equals(mnpBean.getStatusList().getDefaultValue()) &&       "010".equals(mnpBean.getStageList().getDefaultValue())) {
 mnpBean.setShowAddButton(false);         
 }else{
 mnpBean.setShowAddButton(true);         
 }

}

对此表示感谢的任何帮助

Any helping regarding this appreciate

推荐答案

您应该做什么:

1. 将<h:graphicImage/>包裹在类似<h:panelGrid/>

<a4j:outputPanel ajaxRendered="true" layout="none" id="imageContainer">
 <h:graphicImage id="addBtn1"  url=""  rendered="#{mnpBean.showAddButton}" style="cursor:pointer">
    <a4j:support id="addRowBtn1" event="onclick"  actionListener="#{mnpAction.addMultiNoRingFence}"/>
 </h:graphicImage> 
<a4j:outputPanel/>

使用容器的ID作为reRender

<a4j:support event="onchange" actionListener="#{mnpAction.onStageListChangeAction}" reRender="imageContainer" oncomplete="resetViewConfigs();"/>

首先考虑问题的原因，请参见此处

For the reason why the issue is happening the first place, see explanation here

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