Flex3上传附件至服务器

private var file:FileReference;

private var displayTypes:FileFilter=new FileFilter("Excel文件(*.xls)","*.xls");
private var fileFilter:Array=new Array(displayTypes);

//初始化

file = new FileReference();
file.addEventListener(Event.SELECT, onSelect);
file.addEventListener(DataEvent.UPLOAD_COMPLETE_DATA,xmlComplete);

//浏览本地文件

file.browse(fileFilter);

private function onSelect(e: Event): void
{
Alert.show("上传 " + file.name + " (共 "+Math.round(file.size)+" 字节)?",
"确认上传",Alert.YES|Alert.NO,null,proceedWithUpload);

}

private function proceedWithUpload(e:CloseEvent): void
{
if (e.detail == Alert.YES)
{
var upLoadUrl:String=spExcelUrl;
var request:URLRequest = new URLRequest(upLoadUrl);
CursorManager.setBusyCursor();
file.upload(request);

//loading
swfLoader.source="assets/2/loading.swf";
swfLoader.alpha=0.8;
swfLoader.isPopUp=true;
mx.managers.PopUpManager.addPopUp(swfLoader, DisplayObject(parentApplication), true);
mx.managers.PopUpManager.centerPopUp(swfLoader);
}
}

//c#

string uploadFolder = "upload"; // 上传文件夹
protected void Page_Load(object sender, EventArgs e)
{
HttpFileCollection files = Request.Files;

if (files.Count == 0)
{
Response.Write("请勿直接访问本文件");
Response.End();
}

string path = Server.MapPath(uploadFolder);

// 只取第 1 个文件
HttpPostedFile file = files[0];

if (file != null && file.ContentLength > 0)
{
// flash 会自动发送文件名到 Request.Form["fileName"]
string savePath = path + "/" + Request.Form["fileName"];
file.SaveAs(savePath);
getXml(savePath);
System.IO.File.Delete(savePath);
}

}