< f:selectItem>的默认选择在< h:selectOneMenu>中 [英] Default selection for <f:selectItem> within <h:selectOneMenu>

问题描述

如何在<h:selectOneMenu>中为<f:selectItem>进行默认选择?

How to make default selection for <f:selectItem> within <h:selectOneMenu>?

需要在加载页面时已选中下拉菜单中的特定"20"项.

It's needed,that particular "20" item of dropdown to be already selected when page is loaded.

  <h:selectOneMenu value="#{fileSearchCriteriaOut.recordsPerPage}"  >            
               <f:selectItem itemLabel="5" itemValue="5" />
               <f:selectItem itemLabel="10" itemValue="10" />
               <f:selectItem itemLabel="20" itemValue="20" selected="true"/>
  </h:selectOneMenu>

这四个不起作用:

<f:selectItem itemLabel="20" selected="true"/>
<f:selectItem itemLabel="20" selected="selected"/>
<f:selectItem itemLabel="20" checked="checked"/>
<f:selectItem itemLabel="20" checked="true"/>

推荐答案

<h:selectOneMenu id="items" value="#{bean.selectedItem}">
  <f:selectItem itemLabel="10" itemValue="10"/>
  <f:selectItem itemLabel="20" itemValue="20"/>
  <f:selectItem itemLabel="30" itemValue="30"/>
</h:selectOneMenu>

默认选择将是与您在bean中设置的selectedItem值相同的选择.

The default selection would be the one which has value same as selectedItem which you set in bean.

selectedItem = 20;

这篇关于< f:selectItem>的默认选择在< h:selectOneMenu>中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！