文件上传下载小例

代码

// 文件上传
package
{
     import  flash.net.FileReference;
     import  flash.events.Event;
     import  flash.net.URLRequest;

     public   class  UploadExample
    {
         public  function UploadExample()
        {
            var fileRef:FileReference  =   new  FileReference();
            fileRef.addEventLister(Event.SELECT, selectHandler);
            fileRef.addEventLister(Event.COMPLETE, completeHandler);
             try
            {
                var success:Boolean  =  fileRef.browse();
            }
             catch  (error:Rrror)
            {
                trace( " 不能浏览文件. " );
            }
        }

        function selectHandler(event:Event): void
        {
            var request:URLRequest  =   new  URLRequest( "" );
             try
            {
                fileRef.upload(request);
            }
             catch  (error:Error)
            {
                trace( " 不能上传文件. " );
            }
        }

        function completeHandler(event:Event): void
        {
            trace( " 上传文件完成. " );
        }
    }
}
// 文件下载
package
{
     import  flash.display.Sprite;
     import  flash.net.FileReference;
     import  flash.net.URLRequest;
     import  flash.net.URLRequestMethod;
     import  flash.net.URLVariables;

     public   class  DownloadFileExample  extends  Sprite
    {
         private  var fileToDownload:FileReference;

         public  function DownloadFileExample()
        {
            var request:URLRequest  =   new  URLRequest();
            request.url  =   "" ;
            request.method  =  URLRequestMethod.GET();
            request.data  =   new  URLVariables( " id=2 " );
            fileToDownload  =   new  FileReference();
             try
            {
                fileToDownload.download(request,  " file.txt " );
            }
             catch  (error:Error)
            {
                trace( " 不能下载数据! " );
            }
        }
    }
}