Flex combox labelFunction 使用示例

<?xml version="1.0" encoding="utf-8"?>
 
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
                layout="vertical"
                verticalAlign="middle"
                backgroundColor="white">
     
    <mx:Script>
        <![CDATA[
            import mx.utils.StringUtil;
            import mx.controls.Alert;
             
            [Bindable]
            private var arr:Array=[
                {name:"名字11",abbrev:"Al1"},
                {name:"名字12",abbrev:"Al2"},
                {name:"名字13",abbrev:"Al3"},
                {name:"名字14",abbrev:"Al4"},
            ];
             
            private function comboBox_labelFunc(item:Object):String {
                return StringUtil.substitute("{0} ({1})", item.@name, item.@abbrev);
            }
             
            private function comboBox_labelFunc_custom(item:Object):String {
                return StringUtil.substitute("{0} ({1})", item.name, item.abbrev);
            }
             
             
            protected function button1_clickHandler(event:MouseEvent):void
            {
                if(this.comboBox2.selectedItem)
                    Alert.show(this.comboBox2.selectedItem.name);
                else Alert.show("not selected");
                 
                if(this.comboBox.selectedItem)
                    Alert.show(this.comboBox.selectedItem.@name);
                else Alert.show("not selected");
                 
            }
             
        ]]>
    </mx:Script>
     
    <mx:XMLList id="statesXMLList">
        <state abbrev="AL" name="Alabama" />
        <state abbrev="AK" name="Alaska" />
        <state abbrev="AZ" name="Arizona" />
        <state abbrev="AR" name="Arkansas" />
        <state abbrev="CA" name="California" />
        <state abbrev="CO" name="Colorado" />
        <state abbrev="CT" name="Connecticut" />
    </mx:XMLList>
    <mx:ComboBox id="comboBox2"
                 prompt="Please select a aa..."
                 dataProvider="{arr}"
                 labelFunction="comboBox_labelFunc_custom" />
    <mx:Button label="按钮" click="button1_clickHandler(event)"/>
     
    <mx:ComboBox id="comboBox"
                 prompt="Please select a State..."
                 dataProvider="{statesXMLList}"
                 labelFunction="comboBox_labelFunc" />
     
     
     
</mx:Application>

  

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