我正在尝试在上传文件(照片)后重新渲染几个组件,但由于某种原因,上传完成后,组件不会被重新渲染。有人可以帮忙吗?我在 Tomcat 6 中运行应用程序的 64 位 Windows 7 机器上使用 Java 1.6 JSF 1.2 Richfaces 3.3.3 Seam 2.2GA;
<h:panelGrid columns="2" id="photoGrid"
rendered="#{not signUpAction.fileUpRendered}" styleClass="standard">
<h:graphicImage value="#{signUpAction.imageUrl}" width="150" height="171" />
<a4j:region>
<a4j:commandLink id="remove" action="#{signUpAction.removePhoto}"
reRender="a4jphotoUpload" value="Remove Photo" />
</a4j:region>
</h:panelGrid>
<h:panelGroup id="photoGroup" rendered="#{signUpAction.fileUpRendered}">
<rich:fileUpload maxFilesQuantity="1"
fileUploadListener="#{signUpAction.listener}"
addControlLabel="Add a photo..." allowFlash="true"
id="photoUploadWidget" autoclear="true"
listHeight="1" immediateUpload="true" acceptedTypes="jpg,jpeg,png,gif">
<f:facet name="label">
<h:outputText value="{_KB}KB from {KB}KB uploaded --- {mm}:{ss}" />
</f:facet>
<a4j:support event="onuploadcomplete" reRender="photoGrid,photoGroup"/>
</rich:fileUpload>
</h:panelGroup>
我终于想出了一个解决方案,我调用了一个 a4j:jsFunction 来重新渲染组件并从 onuploadcomplete 事件中调用它(参见下面的代码)
<h:panelGroup id="photoGroup" rendered="#{signUpAction.fileUpRendered}">
<rich:fileUpload maxFilesQuantity="1" fileUploadListener="#{signUpAction.listener}"
addControlLabel="Add a photo..."
id="photoUploadWidget" autoclear="true" onuploadcomplete="reloadPhotoPanel()" onfileuploadcomplete="reloadPhotoPanel()"
listHeight="1" immediateUpload="true" acceptedTypes="jpg,jpeg,png,gif">
</rich:fileUpload>
</h:panelGroup>
</a4j:outputPanel>
<a4j:jsFunction id="reloadPhotoPanel" name="reloadPhotoPanel" reRender="photoPanel,photoGrid,photoGroup" />