使用HttpService MXML标签转换XML为Object对象

下面的例子演示如何使用HTTPService标签一个载入的XML文件，通过设置resultFormat属性为“object”，转换为 ActionScript 对象Object 。

全代码：

<? xml version="1.0" encoding="utf-8" ?>
<!--  http://blog.flexexamples.com/2007/09/19/converting-xml-to-objects-using-the-flex-httpservice-mxml-tag/  -->
< mx:Application  xmlns:mx ="http://www.adobe.com/2006/mxml"
        layout ="vertical"
        verticalAlign ="middle"
        backgroundColor ="white"
        creationComplete ="serv.send();" >

     < mx:Script >
         <![CDATA[
            import mx.rpc.events.FaultEvent;
            import mx.rpc.events.ResultEvent;

            private function serv_result(evt:ResultEvent):void {
                var resultObj:Object = evt.result;
                /* Assign the values... */
                nameText.text = resultObj.album.name;
                img0Text.text = resultObj.album.images.image[0];
                img1Text.text = resultObj.album.images.image[1];
                img2Text.text = resultObj.album.images.image[2];
            }

            private function serv_fault(evt:FaultEvent):void {
                /* Show the error label. */
                error.text += evt.fault.faultString;
                error.visible = true;
                /* Hide the form. */
                form.visible = false;
            }
         ]]>
     </ mx:Script >

     < mx:String  id ="XML_URL" > album.xml </ mx:String >

     < mx:HTTPService  id ="serv"
            url ="{XML_URL}"
            resultFormat ="object"
            result ="serv_result(event);"
            fault ="serv_fault(event);"   />

     < mx:ApplicationControlBar  dock ="true" >
         < mx:Label  text ="{XML_URL}"   />
     </ mx:ApplicationControlBar >

     < mx:Label  id ="error"
            color ="red"
            fontSize ="36"
            fontWeight ="bold"
            visible ="false"
            includeInLayout ="{error.visible}" />

     < mx:Form  id ="form"
            includeInLayout ="{form.visible}" >
         < mx:FormItem  label ="resultObj.album.name:" >
             < mx:Label  id ="nameText"   />
         </ mx:FormItem >
         < mx:FormItem  label ="resultObj.album.images.image[0]:" >
             < mx:Label  id ="img0Text"   />
         </ mx:FormItem >
         < mx:FormItem  label ="resultObj.album.images.image[1]:" >
             < mx:Label  id ="img1Text"   />
         </ mx:FormItem >
         < mx:FormItem  label ="resultObj.album.images.image[2]:" >
             < mx:Label  id ="img2Text"   />
         </ mx:FormItem >
     </ mx:Form >

</ mx:Application >

 

 XML文件：

<? xml version="1.0" encoding="utf-8" ?>
< album >
     < name > One </ name >
     < images >
         < image > image1.jpg </ image >
         < image > image2.jpg </ image >
         < image > image3.jpg </ image >
     </ images >
</ album >

结果：