AS3的FileStream追加XML節點

Question

嗨，我想通過FILESTREAM追加XML節點，但不知道如何在Flash中使用FILESTREAM繼承人的代碼，使其理解 XML文件是

<?xml version="1.0" encoding="UTF-8" ?> 
<Sounds> 
    <Value bez="falconp" id="0"> 
     <fad>falconpunch.swf.mp3</fad> 
    </Value>  
</Sounds> 

現在我何時啓動IM選擇一個mp3我想添加一個新值節點與時尚和性能的id和BEZ（BEZ意味着文件名只有幾個字符長度）繼承人代碼即時通訊使用

：

public class SoundboardMain 
    { 
     public var gui:Soundboard; 
//  public var req:URLRequest=new URLRequest(string1); 
     public var sound:Sound; 
     public var xml:XML=new XML(); 
     public var loader:URLLoader=new URLLoader(); 
     public var file:File=new File(); 
     public var daten:FileStream=new FileStream(); 
     public var expl:File; 
     public var fileStream:FileStream = new FileStream(); 
     public var bar:ProgressBar=new ProgressBar(); 
     public function SoundboardMain(gui:Soundboard) 
     { 
      this.gui=gui; 

      file = File.documentsDirectory.resolvePath("Sounds.xml"); 
      loader.addEventListener(Event.COMPLETE, komp); 
      fileStream.open(file, FileMode.WRITE); 
//   xml = XML(fileStream.readUTFBytes(fileStream.bytesAvailable)); 
      loader.load(new URLRequest("Sounds.xml")); 
//   fileStream.writeUTFBytes("HELLO"); 
//   fileStream.close(); 
      trace(xml); 
      loader.addEventListener(Event.COMPLETE, komp); 
      loader.addEventListener(IOErrorEvent.IO_ERROR ,Error); 



     } 
     public function Error(event:IOErrorEvent):void{ 
      trace("Fehler:! "+event.text); 
     } 
     public function komp(event:Event):void{   
      trace("1"); 
      xml=XML(loader.data); 
      gui.buttonshin(); 
     } 
     public function custom(event:MouseEvent):void 
     { 
     expl=new File(); 
     expl.addEventListener(Event.SELECT, onSelec); 
     var swfTypeFilter:FileFilter = new FileFilter("Mp3 Dateien","*.mp3;"); 
     expl.browse([swfTypeFilter]); 

     } 
     public function onSelec(event:Event):void{ 
     expl.addEventListener(Event.COMPLETE, onCompl); 
     expl.addEventListener(ProgressEvent.PROGRESS, prog); 
     expl.addEventListener(IOErrorEvent.IO_ERROR, onFileLoadError); 

     expl.load() 
     trace(expl.name); 
     fileStream.writeUTFBytes(loader.data); 
     bar.visible=true; 
     bar.mode=ProgressBarMode.MANUAL; 
     bar.minimum=0; 
     bar.maximum=100; 

     gui.start.addChild(bar); 
     } 
     public function prog(event:ProgressEvent):void{ 
     var percentLoaded:Number=event.bytesLoaded/event.bytesTotal*100; 
     bar.setProgress(percentLoaded, 100); 
     } 
     public function onFileLoadError(event:IOErrorEvent):void{ 
      bar.visible=false; 
      expl.removeEventListener(Event.COMPLETE, onCompl); 
      expl.removeEventListener(IOErrorEvent.IO_ERROR, onFileLoadError); 
      expl.removeEventListener(ProgressEvent.PROGRESS, prog); 
      trace("File load error"); 
     } 
//  private function saveFile():void 
//  { 
//   var writeStream:FileStream = new FileStream(); 
//   /* 
//   * FileMode.WRITE will truncate (empty) the file on open. 
//   * FileMode.APPEND will open the file "as is" and write in the end of it. 
//   */ 
//   writeStream.open(expl, FileMode.WRITE); 
//   writeStream.writeBytes(data); // Any other write method can be used 
//   writeStream.close(); 
//  } 
     public function onCompl(event:Event):void 
     { 

      var ur:URLRequest=new URLRequest(expl.name); 
//   trace(event.target.nativePath); 
      var string1n:String=new String(event.target.name.substr(0,event.target.nativePath.length-4)); 
//   trace(string1n); 
//   daten.writeUTFBytes("Hekki"); 
//   var newxml:XML=xml.appendChild("TEST"); 
//   f.save(newxml,"Sounds.xml"); 
//   var fs : FileStream = new FileStream(); 
//   var targetFile : File = File(
//   fs.open(targetFile, FileMode.WRITE); 
//   fs.writeUTF("test"); 
//   fs.close(); 
////   var ba:ByteArray=new ByteArray(); 
//   trace(xml); 
//   
     } 
     public function mp3load(event:Event):void{ 

     } 

     public function image1(event:MouseEvent):void{ 
      var reqe:URLRequest=new URLRequest("https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=philipp%2elippold%40yahoo%2ede&lc=DE&item_name=Solidtron&no_note=0&currency_code=EUR&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHostedGuest"); 
//   navigateToURL(reqe); 
     } 
    } 
} 

例如，如果我添加和MP3稱爲funk.mp3 BEZ =臨陣脫逃的XML應該像

<?xml version="1.0" encoding="UTF-8" ?> 
    <Sounds> 
     <Value bez="falconp" id="0"> 
      <fad>falconpunch.swf.mp3</fad> 
     </Value>  
     <Value bez="funk" id="1"> 
      <fad>funk.mp3</fad> 
     </Value> 
    </Sounds> 

Answer 1

您可以使用appendChild with inline XML and e4x expressions：

var fullname:String = event.target.name; 
var shortname:String = name.substr(0, 5); 
var id:int = xml.Value.length(); 
xml.appendChild(<Value baz={shortname} id={id}><fad>{fullname}</fad></Value>); 

var fileStream:FileStream = new FileStream(); 
fileStream.open(file, FileMode.WRITE); 
fileStream.writeUTFBytes(xml.toXMLString()); 
fileStream.close();