FileReference and HttpHandler上传
我在flex里面结合HttpHandler实现文件上传，但是不能成功，代码如下，请问哪里有问题，或者谁有例子吗，可以学习下。
.Net HttpHandler 代码如下：（我要把上传的文件存在目录C:\Documents and Settings\robin_lu\Desktop\Web\UploadFiles下，http://localhost:9191/Web/UpLoadHandler.ashx是部署在IIs上面的）
C# code
<%@ WebHandler Language="C#" Class="UpLoadHandler" %>
using System;
using System.Web;
public class UpLoadHandler : IHttpHandler
{
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
//string tempFile = this.Page.Request.PhysicalApplicationPath;
string tempFile = @"C:\Documents and Settings\robin_lu\Desktop\Web";
HttpFileCollection files = context.Request.Files;
if (files.Count > 0)
{
//string path = context.Server.MapPath(uploadFolder);
for (int j = 0; j < files.Count; j++)
{
HttpPostedFile uploadFile = files[j];
if (uploadFile.ContentLength > 0)
{
uploadFile.SaveAs(string.Format("{0}{1}{2}", tempFile, "UploadFiles\\", uploadFile.FileName));
}
}
}
else
{
context.Response.Write("parameter error");
context.Response.End();
}
}
public bool IsReusable
{
get
{
return false;
}
}
}
flex代码如下：
Java code
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Panel x="49" y="66" width="551" height="164" layout="absolute"
title="使用FileReference上传/下载文件" fontSize="12">
<mx:HDividedBox x="10" y="10" width="511" height="102">
<mx:Canvas id="left" backgroundColor="#D7F4FF" height="100%" width="209">
<mx:TextInput x="4" y="20" id="txtFile" text="{stateText}" width="135"/>
<mx:Button x="147" y="20" label="选择" fontWeight="normal" click="{file.browse()}"/>
<mx:Button x="31" y="68" label="上传文件" width="111" fontWeight="normal" click="onUpLoad()"/>
</mx:Canvas>
<mx:Canvas id="right" backgroundColor="#D7F4FF" height="100%" width="282">
<mx:Label x="6" y="9" text="http://localhost:9191/Web/UploadFiles/AS.txt"/>
<mx:Button x="10" y="37" label="下载文件" fontWeight="normal" click="onDownLoad()"/>
<mx:Label x="10" y="74" width="272" id="resultLabel"/>
<mx:TextInput x="122" y="37" id="downState"/>
</mx:Canvas>
</mx:HDividedBox>
</mx:Panel>
<mx:Script>
<![CDATA[
[Bindable]
private var stateText:String = "Please select a file";
private var file:FileReference = new FileReference();
private var fileDown:FileReference = new FileReference();
/**
* createChildren 比 creationComplete 事件更早发生
* */
protected override function createChildren():void
{
super.createChildren();
file.addEventListener(Event.SELECT,onSelected);
file.addEventListener(Event.COMPLETE,onUploadCompleted);
file.addEventListener(ProgressEvent.PROGRESS,onUploadProgress);
fileDown.addEventListener(Event.COMPLETE,onDownCompleted);
fileDown.addEventListener(ProgressEvent.PROGRESS,onDownProgress);
}
// internal function initApp():void
// {
// file.addEventListener(Event.SELECT,onSelected);
// file.addEventListener(Event.COMPLETE,onCompleted);
// file.addEventListener(ProgressEvent.PROGRESS,onProgress);
// }
internal function onSelected(evt:Event):void
{
stateText = "The selected file:" + file.name;
}
internal function onUploadProgress(evt:ProgressEvent):void
{
stateText = "have uploaded： " + Math.round(100 * evt.bytesLoaded / evt.bytesTotal) + "%";
}
internal function onUploadCompleted(evt:Event):void
{
stateText = "upload complete！";
}
internal function onDownProgress(evt:ProgressEvent):void
{
downState.text = "have downloaded： " + Math.round(100 * evt.bytesLoaded / evt.bytesTotal) + "%";
}
internal function onDownCompleted(evt:Event):void
{
var fileRef:FileReference = evt.currentTarget as FileReference;
resultLabel.text = "file name：" + fileRef.name + " is downloaded completely！";
}
/**
* 调用FileReference的实例方法upload()实现文件上传
* */
internal function onUpLoad():void
{
if(file.size > 0)
{
stateText = "Uploading file：" + file.name;
}
var request:URLRequest = new URLRequest();
request.url="http://localhost:9191/Web/UpLoadHandler.ashx";
file.upload(request);
}
/**
* 调用FileReference类的实例方法download()实现文件下载
* */
internal function onDownLoad():void
{
var request:URLRequest = new URLRequest();
request.url="http://localhost:9191/Web/UploadFiles/flex sourcecode.txt";
fileDown.download(request);
}
]]>
</mx:Script>
</mx:Application>
