OpenWritings.net

<?xml version="1.0" encoding="utf-8"?>
<!--
Description: Show how to write string to a file.
Note: This example can only be run as Adobe AIR application.
-->
<s:WindowedApplication xmlns:fx="http://ns.adobe.com/mxml/2009" 
             xmlns:s="library://ns.adobe.com/flex/spark" 
             xmlns:mx="library://ns.adobe.com/flex/mx"
             creationComplete="main()"
             >
  <fx:Script>
    <![CDATA[
      import flash.filesystem.File;
      import flash.filesystem.FileStream;
      import flash.filesystem.FileMode;
 
      public function main():void
      {
        // Point a File object to a file path.
        var oFile:File = new File();
        var sFilePath:String = "c:/myfile.txt";
        oFile.nativePath = sFilePath;
 
        // Open the file.
        var oWrite:FileStream = new FileStream();
        oWrite.open(oFile, FileMode.WRITE);
 
        // Here  is the tricky part. In order to write
        //  a string to a file, you have to first convert the string
        //  into a ByteArray and then write the ByteArray into the file.
        var sText:String = "Write this message to a file."
        var oByteArray:ByteArray = new ByteArray();
        oByteArray.writeUTFBytes(sText);
        oWrite.writeBytes(oByteArray, 0, oByteArray.length);
 
        // Close the file.
        oWrite.close();
 
      }
    ]]>
  </fx:Script>
</s:WindowedApplication>