using System;using System.Collections.Generic;using System.Text;using System.IO;using System.Drawing;using System.Web;using FluorineFx;using FluorineFx.AMF3;namespace ServiceLibrary5{    [RemotingService]    public class ByteStreamService    {        public ByteArray UploadImage(ByteArray ba)        {            MemoryStream ms = new MemoryStream(ba.GetBuffer());            Image img = Bitmap.FromStream(ms);            Bitmap newImage = new Bitmap(img);            MemoryStream tempStream = new MemoryStream();            newImage.Save(tempStream, System.Drawing.Imaging.ImageFormat.Png);            string path = HttpContext.Current.Server.MapPath("UpLoad/ByteArray.png");            FileStream fs = new FileStream(path, FileMode.Create);            tempStream.WriteTo(fs);            fs.Close();            ByteArray result = new ByteArray(tempStream);            return result;        }    }}

<?xml version="1.0" encoding="utf-8"?><mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">	<mx:Panel x="28" y="58" width="364" height="417" layout="absolute">		<mx:Canvas id="myCanvas" x="0" y="0" width="334" height="331" 			mouseDown="onMouseDown()" mouseUp="onMouseUp()" mouseMove="onMouseMove()">		</mx:Canvas>		<mx:ControlBar x="135" y="459">			<mx:ColorPicker change="curColor = event.target.selectedColor" />			<mx:Button label="清空" click="onClear()" />			<mx:Button label="保存" click="onSave()" />		</mx:ControlBar>	</mx:Panel>	<mx:Image id="imgBox" x="462" y="83"/>	<mx:Script>		<![CDATA[			import mx.core.UIComponent;			import mx.containers.Box;			import mx.controls.Alert;			import mx.rpc.events.ResultEvent;			import mx.graphics.codec.PNGEncoder;			private var flag:Boolean = false;			private var startX:int;			private var startY:int;			private var curColor:uint = 0x000000;					private function onSave():void			{				var bd:BitmapData = http://www.mamicode.com/new BitmapData(myCanvas.width,myCanvas.height);				bd.draw(myCanvas);				var byteArray:ByteArray = new PNGEncoder().encode(bd);								var nc:NetConnection = new NetConnection();				nc.client = this;				var responder:Responder = new Responder(onResult,onStatus);				nc.connect("http://localhost:9782/Web/Gateway.aspx");				nc.call("ServiceLibrary5.ByteStreamService.UploadImage",responder,byteArray);			}						private function onResult(result:ByteArray):void			{				//利用Loader读取图片				var loader:Loader = new Loader();				loader.contentLoaderInfo.addEventListener(Event.COMPLETE,onComplete);				loader.loadBytes(result);			}						private function onComplete(event:Event):void			{				//利用UIComponent加载Loader对象				var loader:Loader = (event.target  as  LoaderInfo).loader;				loader.contentLoaderInfo.removeEventListener(Event.COMPLETE,onComplete);	            			var pictureHolder:UIComponent = new UIComponent();				pictureHolder.addChild(loader);				this.imgBox.width = myCanvas.width;				this.imgBox.height = myCanvas.height;				this.imgBox.addChild(pictureHolder);			}						private function onStatus(obj:Object):void			{				Alert.show(obj.code.toString());			}					private function onClear():void			{				myCanvas.graphics.clear();			}					private function onm ouseDown():void			{				startX = myCanvas.mouseX;				startY = myCanvas.mouseY;				flag = true;			}						private function onm ouseUp():void			{				flag = false;			}						private function onm ouseMove():void			{				if(flag)				{					myCanvas.graphics.moveTo(startX,startY);					myCanvas.graphics.lineStyle(2,curColor);					myCanvas.graphics.lineTo(myCanvas.mouseX,myCanvas.mouseY);										startX = myCanvas.mouseX;					startY = myCanvas.mouseY;				}			}		]]>	</mx:Script></mx:Application>