设置ComboBox控件的下拉栏的宽度.

ComboBox控件的dropdownWidth属性.

示例：

代码：

<?xml version="1.0" encoding="utf-8"?>

<!-- http://blog.flexexamples.com/2008/07/02/setting-the-width-of-the-dropdown-menu-on-a-combobox-control-in-flex/ -->

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

layout="vertical"

verticalAlign="top"

backgroundColor="white">

<mx:Array id="arr">

<mx:Object label="One" />

<mx:Object label="Two" />

<mx:Object label="Three" />

<mx:Object label="Four" />

<mx:Object label="Five" />

<mx:Object label="Six" />

<mx:Object label="Seven" />

<mx:Object label="Eight" />

<mx:Object label="Nine" />

<mx:Object label="Ten" />

</mx:Array>

<mx:ComboBox id="comboBox"

dataProvider="{arr}"

dropdownWidth="200" />

</mx:Application>

也可以通过AS来实现.

<?xml version="1.0" encoding="utf-8"?>

<!-- http://blog.flexexamples.com/2008/07/02/setting-the-width-of-the-dropdown-menu-on-a-combobox-control-in-flex/ -->

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

layout="vertical"

verticalAlign="top"

backgroundColor="white"

initialize="init();">

<mx:Script>

<![CDATA[

import mx.controls.ComboBox;

private var arr:Array;

private var comboBox:ComboBox;

private function init():void {

arr = [];

arr.push({label:"One"});

arr.push({label:"Two"});

arr.push({label:"Three"});

arr.push({label:"Four"});

arr.push({label:"Five"});

arr.push({label:"Six"});

arr.push({label:"Seven"});

arr.push({label:"Eight"});

arr.push({label:"Nine"});

arr.push({label:"Ten"});

comboBox = new ComboBox();

comboBox.dataProvider = arr;

comboBox.dropdownWidth = 200;

addChild(comboBox);

}

]]>

</mx:Script>

</mx:Application>