Question

我使用 XML 列表聚合器作为火花 ComboBox, 受到此链接的启发

< a href=>http://blogblog.shortvission.com/index.cfm/2009/15/FlexAS3-Custom-ComboBox-for-ComboBox-for-Cordries-with-XML" rel=“notfollown noreferrerr>http://blog.shortvission.com/index.cfm/2009/15/FlexAS3-Custom-ComboBox-for-Cordries- with-XML

XML 列表集合在此定义 :

public class ComboBox_Country extends ComboBox {

    private var Country:XML=new XML(
        <countries>
         <country code="US" iso="840" label="United States" />
         <country code="CA" iso="124" label="Canada" />
         <country code="GB" iso="826" label="United Kingdom" />
                     ....
         <country code="ZM" iso="894" label="Zambia" />
         <country code="ZW" iso="716" label="Zimbabwe" />
        </countries>);

    public function ComboBox_Country() {
        dataProvider = new XMLListCollection(Country.children());
        labelField =  @label ;
    }

在 mxml 中喊叫 :

<mycomp:ComboBox_Country id="countryComboBox" width="100%"/>

当用户选择时, 我可以从 : < code> countryComboBox. sectedIndex 获得索引。但是, 我需要国家的字符串, 我不知道如何从 XML 列表中提取索引。当我在调试器中看到 :

""https://i.sstatic.net/UzWlC.png" alt="此处输入图像描述"/ >

s 表示用户选择的索引2(例如联合王国)。要输入调试器返回 United Kingdom 需要输入什么?

countryComboBox.Country.getItemAt(2)
countryComboBox.Country.getItemAt(2).label
countryComboBox.Country[2]
countryComboBox.Country.label.getItemAt(2)
etc...

徒劳无益。

Answer 1

ComboBox have a property selectedItem which you probably should use. In this case selectedItem would be XML object. Read how you can get data from XML objects here. In your case you can get label using

countryComboBox.selectedItem.@label

Answer 2

我不完全确定您正确装入组合框是否正确, 您通常使用数据提供者( http:// help. adobe. com/ en_ US/ flex/ using/ WS70f0d54f063b9b081ac8d11247252e4a0-8000. html" rel=“ nofollow” > http://help. adobe. com/ en_ US/ flex/using/ WS70f0d54f063b9b083b081 aac8d11247252e4a0-8000. html

假设你正确显示数据,那么你就会非常接近

// Should give you the country object selected
var obj:Object = countryComboBox.selectedItem;

// You should also be able to use .code or .iso
return obj.label;

如果 obj. label 不工作, 您可以尝试 aobj[ 标签];

友情链接