jquery.uploadify+ashx实现文件上传

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="WebApplication1._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Uploadify</title>
    <%--<link href="JS/example/css/default.css"
rel="stylesheet" type="text/css" />--%>
    <link href="js/uploadify.css" rel="stylesheet" type="text/css" />
    <link href="js/uploadify.css" rel="stylesheet" type="text/css" />

    <script src="js/jquery-1.4.2.min.js" type="text/javascript"></script>

    <script type="text/javascript" src="js/swfobject.js"></script>

    <script src="js/jquery.uploadify.v2.1.4.min.js" type="text/javascript"></script>

    <script type="text/javascript">
        $(document).ready(function() {
            $("#uploadify").uploadify({
                'uploader': 'js/uploadify.swf',
                'script': 'UploadHandler.ashx',
                'cancelImg': 'js/cancel.png',
                'folder': 'UploadFile',
                'queueID': 'fileQueue',
                'auto': false,
                'multi': true
            });
        });
    </script>

</head>
<body>
    <div id="fileQueue">
    </div>
    <input type="file" name="uploadify" id="uploadify" />
    <p>
        <a href="javascript:$('#uploadify').uploadifyUpload()">上传</a>| <a href="javascript:$('#uploadify').uploadifyClearQueue()">
            取消上传</a>
    </p>
</body>
</html>

View Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;

namespace WebApplication1
{
    /// <summary>
    /// $codebehindclassname$ 的摘要说明
    /// </summary>

    public class UploadHandler : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {
            context.Response.ContentType = "text/plain";
            context.Response.Charset = "utf-8";

            HttpPostedFile file = context.Request.Files["Filedata"];
            string uploadPath =
            HttpContext.Current.Server.MapPath(@context.Request["folder"]) + "\\";

            if (file != null)
            {
                if (!Directory.Exists(uploadPath))
                {
                    Directory.CreateDirectory(uploadPath);
                }
                file.SaveAs(uploadPath + file.FileName);
                //下面这句代码缺少的话，上传成功后上传队列的显示不会自动消失
                context.Response.Write("1");
            }
            else
            {
                context.Response.Write("0");
            }
        }
        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}