Flex3加载外部数据1

加载数据 2023-01-31 05:01:15 885人浏览独家记忆

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摘要

1.加载文本文件中的纯文本: LoadData1.mxml <?xml version="1.0" encoding="utf-8"?> <!--通过Bind绑定，使用了MXML的httpservice标签，结果格式为t

1.加载文本文件中的纯文本:

LoadData1.mxml

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

<mx:Application xmlns:mx="Http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="txtLoader.send();">
  <mx:Style>
    Application{font-size:12px;}
  </mx:Style>
  <mx:HTTPService id="txtLoader" url="test1.txt" resultFORMat="text"/>
  <mx:VBox>
    <mx:Text text="{txtLoader.lastResult}" />
  </mx:VBox>
</mx:Application>

文本文件test1.txt:

这是用于Flex的一段测试文本

运行结果：

2.这里不是用MXML标签，而采用类

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

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="loadTxt(event);">
  <mx:Style>
    Application{fontSize:14px;}
  </mx:Style>
  <mx:Script>
    <![CDATA[
      import mx.rpc.events.ResultEvent;
      import mx.events.FlexEvent;
      import mx.rpc.http.HTTPService;
      private var txtLoader:HTTPService=new HTTPService();

      //加载文本代码如下
      private function loadTxt(evt:FlexEvent):void
      {
        txtLoader.url="test1.txt";//文件路径
        txtLoader.resultFormat="text";//结果的格式是纯文本
        txtLoader.addEventListener(ResultEvent.RESULT,resultHandler);

        txtLoader.send();
      }
      private function resultHandler(evt:ResultEvent):void
      {
        myTxt.text=evt.target.lastResult;//这里为文本控件赋值
      }
    ]]>
  </mx:Script>
  <mx:VBox>
    <mx:Text id="myTxt"/>
  </mx:VBox>
</mx:Application>

结果同上。

3.使用URLLoader类加载数据

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

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="loadTxt(event)">

  <mx:Script>
    <![CDATA[
      import mx.events.FlexEvent;

      private var loader:URLLoader=new URLLoader();
      private function loadTxt(evt:FlexEvent):void
      {
        loader.addEventListener(Event.COMPLETE,handleData);
        loader.load(new URLRequest("test1.txt"));
      }

      //数据加载完毕，为文本赋值
      private function handleData(evt:Event):void
      {
        myTxt.text=evt.target.data;//URLLoader对象的data域
      }
    ]]>
  </mx:Script>
  <mx:VBox>
    <mx:Text id="myTxt" fontSize="18"/>
  </mx:VBox>
</mx:Application>

结果同上。

4.加载url编码值对数据:

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

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="svc.send();">
  <mx:Style>
    Application{fontSize:14px;}
  </mx:Style>
  <mx:HTTPService id="svc" url="test2.txt" resultFormat="flashvars"/>
  <mx:HBox>
    <mx:Label text="{svc.lastResult.lbl}"/>
    <mx:ComboBox dataProvider="{svc.lastResult.jobs.split(',')}" />
  </mx:HBox>
</mx:Application>

test2.txt:

lbl=职位&jobs=网页设计师,软件工程师,项目经理

结果:

5.使用HTTPService类加载值对:

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

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="loadVal(event);">
  <mx:Style>
    Application{fontSize:12px;color:#ff0000;}
  </mx:Style>
  <mx:Script>
    <![CDATA[
      import mx.rpc.events.ResultEvent;
      import mx.events.FlexEvent;
      import mx.rpc.http.HTTPService;
      private var svc:HTTPService=new HTTPService();
      private function loadVal(evt:FlexEvent):void
      {
        svc.url="test2.txt";
        svc.resultFormat="flashvars";//结果格式-值对
        svc.addEventListener(ResultEvent.RESULT,handleResult);
        svc.send();
      }
      private function handleResult(evt:ResultEvent):void
      {
        lbl.text=svc.lastResult.lbl;
        combox.dataProvider=svc.lastResult.jobs.split(",");
      }
    ]]>
  </mx:Script>
  <mx:HBox>
    <mx:Label id="lbl"/>
    <mx:ComboBox id="combox"/>
  </mx:HBox>
</mx:Application>

结果:

6.使用URLLoader类加载值对数据:

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

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" creationComplete="loadVal(event);">
  <mx:Style>
    Application{font-size:14px;color:green;}
  </mx:Style>
  <mx:Script>
    <![CDATA[
      import mx.events.FlexEvent;
      import flash.net.URLLoader;

      private var loader:URLLoader=new URLLoader();
      private function loadVal(evt:FlexEvent):void
      {
        loader.addEventListener(Event.COMPLETE,handleComplete);
        loader.load(new URLRequest("test2.txt"));
      }
      private function handleComplete(evt:Event):void
      {
        var value:URLVariables=new URLVariables(evt.target.data);
        lbl.text=value.lbl;
        combox.dataProvider=value.jobs.split(",");
      }
    ]]>
  </mx:Script>
  <mx:HBox>
    <mx:Label id="lbl"/>
    <mx:ComboBox id="combox"/>
  </mx:HBox>
</mx:Application>

结果: