Flex uses webservice to upload photos to implement code

/// <summary> 
/// 上传文件到远程服务器 
/// </summary> 
/// <param name="fileBytes">文件流</param> 
/// <param name="fileName">文件名</param> 
/// <returns>字符串</returns> 
[WebMethod(Description = "上传文件到远程服务器.")] 
public string UploadFile(byte[] fileBytes, string fileName) 
{ 
try 
{ 
MemoryStream memoryStream = new MemoryStream(fileBytes); //1.定义并实例化一个内存流，以存放提交上来的字节数组。 
FileStream fileUpload = new FileStream(Server.MapPath(".") + "\\" + fileName, FileMode.Create); ///2.定义实际文件对象，保存上载的文件。 
memoryStream.WriteTo(fileUpload); ///3.把内存流里的数据写入物理文件 
memoryStream.Close(); 
fileUpload.Close(); 
fileUpload = null; 
memoryStream = null; 
return "文件已经上传成功"; 
} 
catch (Exception ex) 
{ 
return ex.Message; 
} 
}

<?xml version="1.0" encoding="utf-8"?> 
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" 
xmlns:s="library://ns.adobe.com/flex/spark" 
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" creationComplete="application1_creationCompleteHandler(event)"> 
<fx:Script> 
<![CDATA[ 
import mx.controls.Alert; 
import mx.events.FlexEvent; 
import mx.graphics.codec.JPEGEncoder; 
import mx.rpc.events.FaultEvent; 
import mx.rpc.events.ResultEvent; 

protected function application1_creationCompleteHandler(event:FlexEvent):void 
{ 
var width :int = imgID.width; 
var height :int = imgID.height; 
var bitmapData:BitmapData =new BitmapData(width,height); 
bitmapData.draw(imgID); 

var byteArr:ByteArray = bitmapData.getPixels(new Rectangle(0,0,width,height)); 
var byteArr123:ByteArray =new JPEGEncoder().encodeByteArray(byteArr,width,height); 

webService.UploadFile(byteArr123,"123.png"); 
} 

protected function webService_faultHandler(event:FaultEvent):void 
{ 
Alert.show(event.fault.toString()); 
} 

protected function webService_successHandler(event:ResultEvent):void 
{ 
Alert.show(event.result.toString()); 
} 

]]> 
</fx:Script> 
<fx:Declarations> 
<!-- 将非可视元素（例如服务、值对象）放在此处 --> 
<s:WebService id="webService" wsdl="http://10.19.1.48/upImg/Service1.asmx?WSDL" fault="webService_faultHandler(event)"> 
<s:operation name="UploadFile" result="webService_successHandler(event)"></s:operation> 
</s:WebService> 
</fx:Declarations> 
<mx:Image id="imgID" x="186" y="103" width="583" height="397" source="file:/G:/360云盘/照片/2013Beijing MapOfSubway.jpg"/> 
</s:Application>