How to get the value of a ComboBox in ActionScript - apache-flex

Question

I want to show the value of a ComboBox in it's Change event handler. The labelField is assigned dynamically, so that I don't know what it is when I run the event handler
cmbArea.labelField = qry.outFields[0];
I was hoping that I can have access to the value of selectedItem like:
protected function cmbArea_changeHandler(event:IndexChangeEvent):void{
// TODO Auto-generated method stub
Alert.show(event.target.selectedItem.value);
}
But it didn't work.
Any help would be much appreciated.

Answer 1

It's difficult to debug this without seeing your data provider code or the error message. However, it doesn't matter that the labelField is assigned dynamically. What you have will work if elements in your data provider have a property named "value". If the only property in your data provider is the one you assign as the labelField, you should be able to access it in your change handler with the following:
Alert.show(ComboBox(event.target).selectedItem);

Answer 2

<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<fx:Script>
<![CDATA[
import mx.controls.Alert;
import spark.events.IndexChangeEvent;
protected function comboBox_changeHandler(event:IndexChangeEvent):void
{
Alert.show(comboBox.selectedItem);
}
]]>
</fx:Script>
<s:ComboBox id="comboBox"
change="comboBox_changeHandler(event)">
<s:dataProvider>
<s:ArrayList>
<fx:String>Item 1</fx:String>
<fx:String>Item 2</fx:String>
<fx:String>Item 3</fx:String>
</s:ArrayList>
</s:dataProvider>
</s:ComboBox>
</s:Application>

Answer 3

I tested the following line and seems it works:
Alert.show(event.target.selectedItem[event.target.labelField]);