ASP.NET打包生成zip压缩文件

using System;
using System.Collections.Generic;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using Microsoft.Win32;
using System.Diagnostics;
using ICSharpCode.SharpZipLib.Zip;


public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {

        }
    }

 protected void btnSave_Click(object sender, EventArgs e)
    {
        string str = "1.jpg|2.jpg|3.jpg";//文件名
      string saveName = "test";//保存的文件名
        MemoryStream ms = new MemoryStream();
        byte[] buffer = null;

        using (ZipFile file = ZipFile.Create(ms))
        {
            file.BeginUpdate();
            file.NameTransform = new MyNameTransfom();//通过这个名称格式化器，可以将里面的文件名进行一些处理。默认情况下，会自动根据文件的路径在zip中创建有关的文件夹。

            string[] s = str.Split(‘|‘);
            foreach (string item in s)
            {
                file.Add(Server.MapPath("~/newImages/" + item + ""));
            }

            file.CommitUpdate();

            buffer = new byte[ms.Length];
            ms.Position = 0;
            ms.Read(buffer, 0, buffer.Length);
        }

        Response.AddHeader("content-disposition", "attachment;filename=" + saveName + ".zip");
        Response.BinaryWrite(buffer);
        Response.Flush();
        Response.End(); 
    }
 public class MyNameTransfom : ICSharpCode.SharpZipLib.Core.INameTransform
    {

        #region INameTransform 成员

        public string TransformDirectory(string name)
        {
            return null;
        }

        public string TransformFile(string name)
        {
            return Path.GetFileName(name);
        }

        #endregion
    }
 }