Question

I m dynamically adding a h:selectOneMenu to the page. But the listener method for f:ajax is not invoked for selectItems but it does work if h:selectOneMenu had been added to the page from the start (not dynamically added using update attribute). My code as follows:

(根据@Daniels建议更正)

    <h:commandButton value="Watch">
          <f:ajax render="deptsSelBox"/>
          <f:setPropertyActionListener value="#{true}" target="#{listRetriever.allow}" />
    </h:commandButton>  

    <h:panelGroup id="deptsSelBox">
        <h:selectOneMenu id="deptsSel" rendered="#{listRetriever.allow}" value="#{listRetriever.reqId}">  
            <f:selectItems value="#{listRetriever.list}" />
            <f:ajax listener="#{listRetriever.retrieve()}" execute="deptsSel" />
        </h:selectOneMenu>
    </h:panelGroup>

Answer 1

h:command Button 没有 update 属性, 看起来像是介面和纯 JSF 的组合( update 属性来自 p:command Button )

向您的 命令按钮 添加 /code> 到您的命令按钮 , 并使用 render 属性



<h:commandButton value="Watch">
      <f:ajax render="deptsSelBox"/>
      <f:setPropertyActionListener value="#{true}" target="#{listRetriever.allow}" />
</h:commandButton>   


将选择的ajax 修改为此

<f:ajax listener="#{listRetriever.retrieve}" update="deptsSel"/>


尝试将范围从  request  更改为 view 

另一种方法是将 allow  的值设置在方法中, 像这样( 您也可以将它作为参数发送) 。

<h:commandButton value="Watch" action="listRetriever.updateAllow">
      <f:ajax render="deptsSelBox"/>
</h:commandButton>  


public void updateAllow(){
     allow = true;
}

友情链接