Ajax调用JSF-2.0后Commandlink行动不起作用 [英] Commandlink action does not work after an ajax call JSF-2.0

问题描述

在commandlink链接2没有下班后一个Ajax调用，以使面板组PANEL1。这是当整个页面被relaoded而不是Ajax调用显示模式工作。

Main.xhtml

 ＆LT; H：panelGroup中的id =PANEL1＆GT;
＆LT; UI：片段渲染=＃{downloadTo.showModal}＆GT;
    ＆LT;用户界面：包括SRC =modal.xhtml/＆GT;
＆LT; / UI：片断＆gt;
＆LT; /小时：panelGroup中＆GT;

＆LT; H：形式GT;
  ＆LT; H：commandLink ID =链接值=下载行动=＃{backing.openModal（）}＆GT;
    ＆LT; F：AJAX渲染=_ PANEL1/＆GT;
 ＆LT; / H：commandLink＆GT;
＆LT; /小时：形式GT;
 

modal.xhtml包含

 ＆LT; H：形式GT;
   ＆LT; H：commandLink ID =链接2值=下载行动=＃{backing.downloadData（）}/＆GT;
 ＆LT; /小时：形式GT;
 

解决方案

您需要确保支持bean持有的渲染属性的条件 @ViewScoped 。否则病情会被初始化为默认的Ajax请求。您还需要修改＆LT; F：AJAX＆GT; 渲染明确包括任何其他的客户端ID ＆LT; H：形式GT; 这是Ajax的更新，否则就会失去它的视图状态。

例如。在 modal.xhtml

 ＆LT; H：格式ID =downloadForm＆GT;
  ＆LT; H：commandLink ID =链接2值=下载行动=＃{backing.downloadData（）}/＆GT;
＆LT; /小时：形式GT;
 

这种变化在 main.xhtml

 ＆LT; H：形式GT;
  ＆LT; H：commandLink ID =链接值=下载行动=＃{backing.openModal（）}＆GT;
    ＆LT; F：AJAX渲染=_ PANEL1 _downloadForm/＆GT;
 ＆LT; / H：commandLink＆GT;
＆LT; /小时：形式GT;
 

参见：

• <一个href="http://balusc.blogspot.com/2011/09/communication-in-jsf-20.html#AjaxRenderingOfContentWhichContainsAnotherForm"相对=nofollow>在JSF 2.0通信 - 内容的Ajax渲染包含另一种形式

The commandlink link2 does not have work after an ajax call is made to render a panel group panel1. This was working when the whole page was relaoded instead of ajax call to display the modal.

Main.xhtml

<h:panelGroup id="panel1">
<ui:fragment rendered="#{downloadTo.showModal}">
    <ui:include src="modal.xhtml" />
</ui:fragment>  
</h:panelGroup>

<h:form>
  <h:commandLink id="link" value="download" action="#{backing.openModal()}">
    <f:ajax render="_panel1"/>
 </h:commandLink>       
</h:form>

modal.xhtml contains

 <h:form>
   <h:commandLink id="link2" value="download" action="#{backing.downloadData()}"/>
 </h:form>

解决方案

You need to make sure that the backing bean holding the condition for the rendered attribute is @ViewScoped. Otherwise the condition will be reinitialized to default on the ajax request. You also need to change the <f:ajax> render to explicitly include the client ID of any other <h:form> which is to be ajax-updated, otherwise it will lose its view state.

E.g. in modal.xhtml

<h:form id="downloadForm">
  <h:commandLink id="link2" value="download" action="#{backing.downloadData()}"/>
</h:form>

with this change in main.xhtml

<h:form>
  <h:commandLink id="link" value="download" action="#{backing.openModal()}">
    <f:ajax render="_panel1 _downloadForm" />
 </h:commandLink>       
</h:form>

See also:

• Communication in JSF 2.0 - Ajax rendering of content which contains another form

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