///<summary>
  /// 批量打包下载 Author:吴双
  /// </summary>
  /// <param name="fileName">文件名称</param>
  /// <param name="filePath">文件虚拟路径</param>
  public static void DownLoadFiles(string fileName, string filePath)
  {
   List<string> fileNames = fileName.Split('|').ToList();
   List<string> filePaths = filePath.Split('|').ToList();
   MemoryStream ms = new MemoryStream();
   byte[] buffer = null;
   using (ZipFile file = ZipFile.Create(ms))
   {
    file.BeginUpdate();
    file.NameTransform = new MyNameTransfom();
    filePaths.ForEach(t =>
    {
     file.Add(HttpContext.Current.Server.MapPath(t));
    });

    file.CommitUpdate();
    buffer = new byte[ms.Length];
    ms.Position = 0;
    ms.Read(buffer, 0, buffer.Length);
   }
   string ss = "批量下载" + fileNames[0] + "等";
   HttpContext.Current.Response.AddHeader("content-disposition", "attachment;filename=" + ss + ".zip");
   HttpContext.Current.Response.BinaryWrite(buffer);
   HttpContext.Current.Response.Flush();
   HttpContext.Current.Response.End();
  }

 public void ProcessRequest(HttpContext context)
  {
   //context.Response.ContentType = "text/plain";
   //context.Response.Write("Hello World");

   DownLoadFiles("xxx", "~/Pic/00.gif|~/Pic/02.png");

  }