< f:selectItems itemDescription>不起作用 [英] <f:selectItems itemDescription> does not work

问题描述

我有代码

<p:selectOneMenu id="starter" value="#{reportRegisterManagedBean.starter}" style="width:160px" converter="#{reportStarterConverter}">
<f:selectItem itemLabel="Select Report Starter" itemValue="0"
itemDescription="TEST" />
<f:selectItems
value="#{reportRegisterManagedBean.startersSelectItems}" var="ds" itemLabel="#{ds.name}" itemValue="#{ds}" itemDescription="#{ds.description}" />
</p:selectOneMenu>

此处itemDescription="TEST"属性在<f:selectItem>标记中效果很好.但itemDescription="#{ds.description}"在<f:selectItems>标签中不起作用.

here itemDescription="TEST" atribute works very well in <f:selectItem> tag. but itemDescription="#{ds.description}" not working in <f:selectItems> tag.

是这里的错误吗?

推荐答案

f:selectItems需要一个您在我们的bean中定义的列表，如下所示:

f:selectItems requires a List which you define in our bean like this:

List<SelectItem> list = new LinkedList<SelectItem>();
list.add(new SelectItem("this will be the return value -> itemValue", "this will be the display value -> itemLable"));

如果这样做，您甚至不需要itemValue或itemDescription，因为它已在列表中定义.

If you do so, you don't even need itemValue or itemDescription, because it's already defined in the list.

更新(注意:您不需要itemValue，itemDescription):

在您的xhtml页面中，它看起来像这样:

In your xhtml page it would look like this:

<p:selectOneMenu value="#{reportRegisterManagedBean.starter}">
    <f:selectItems value="#{reportRegisterManagedBean.startersSelectItems}" />
</p:selectOneMenu>

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