异步读取文件代码,AS代码库,德仔网

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【AS】异步读取文件

作者:芷君 / 发布于2014/11/4/ 857


	// Imports
	 import flash.filesystem.FileMode;
	 import flash.filesystem.FileStream;
	 import flash.filesystem.File;
	 import flash.events.ProgressEvent;
	 import flash.events.Event;
	
	 // Declare the FileStream and String variables
	
	 private var _fileStream:FileStream;
	
	 private var _fileContents:String;
	
	 private function onCreationComplete():void // Fired when the application has been created
	
	 {
	
	 var myFile:File = File.appResourceDirectory; // Create out file object and tell our File Object where to look for the file
	
	 myFile = myFile.resolve("mySampleFile.txt"); // Point it to an actual file
	
	
	 _fileStream = new FileStream(); // Create our file stream
	
	 _fileStream.addEventListener(ProgressEvent.PROGRESS, onFileProgress); // Add our the progress event listener
	
	 _fileStream.addEventListener(Event.COMPLETE, onFileComplete); // Add our the complete event listener
	
	 _fileStream.openAsync(myFile, FileMode.READ); // Call the openAsync() method instead of open()
	
	 }
	 private function onFileProgress(p_evt:ProgressEvent):void // Event handler for the PROGRESS Event
	 {
	 _fileContents += _fileStream.readMultiByte(_fileStream.bytesAvailable, "iso-8859-1"); // Read the contens of the file and add to the contents variable
	
	 fileContents_txt.text = _fileContents; // Display the contents. I've created a TextArea on the stage for display
	 }
	
	 private function onFileComplete(p_evt:Event):void // Event handler for the COMPLETE event
	
	 {
	 _fileStream.close(); // Clean up and close the file stream
	 }

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