using ICSharpCode.SharpZipLib.Checksum;
using ICSharpCode.SharpZipLib.Zip;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace Demo
{
public partial class index : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
List<string> listFJ = new List<string>();//保存附件路径
List<string> listFJName = new List<string>();//保存附件名字
for (int i = 0; i < 2; i++)
{
listFJ.Add(Server.MapPath("upload/") + (i + 1) + ".txt");
listFJName.Add((i + 1) + ".txt");
}
string time = DateTime.Now.Ticks.ToString();
ZipFileMain(listFJ.ToArray(), listFJName.ToArray(), Server.MapPath("upload/" + time + ".zip"), 9);//压缩文件
DownloadFile(Server.UrlEncode("附件.zip"), Server.MapPath("upload/" + time + ".zip"));//下载文件
}
private void DownloadFile(string fileName, string filePath)
{
FileInfo fileInfo = new FileInfo(filePath);
Response.Clear();
Response.ClearContent();
Response.ClearHeaders();
Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName);
Response.AddHeader("Content-Length", fileInfo.Length.ToString());
Response.AddHeader("Content-Transfer-Encoding", "binary");
Response.ContentType = "application/octet-stream";
Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
Response.WriteFile(fileInfo.FullName);
Response.Flush();
File.Delete(filePath);//删除已下载文件
Response.End();
}
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="fileName">要压缩的所有文件（完全路径)</param>
/// <param name="fileName">文件名称</param>
/// <param name="name">压缩后文件路径</param>
/// <param name="Level">压缩级别</param>
public void ZipFileMain(string[] filenames, string[] fileName, string name, int Level)
{
ZipOutputStream s = new ZipOutputStream(File.Create(name));
Crc32 crc = new Crc32();
//压缩级别
s.SetLevel(Level); // 0 - store only to 9 - means best compression
try
{
int m = 0;
foreach (string file in filenames)
{
//打开压缩文件
FileStream fs = File.OpenRead(file);//文件地址
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
//建立压缩实体
ZipEntry entry = new ZipEntry(fileName[m].ToString());//原文件名
//时间
entry.DateTime = DateTime.Now;
//空间大小
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
m++;
}
}
catch
{
throw;
}
finally
{
s.Finish();
s.Close();
}
}
}
}