ZipClass.cs 这个是一个压缩文件的类，可直接复制使用，使用到的命名空间是
using System.IO;
using ICSharpCode.SharpZipLib;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;
请自行网上查找此压缩程序集下载使用
public class ZipClass { #region ZipFileDictory /// <summary> /// 递归压缩文件夹方法 /// </summary> /// <param name="FolderToZip"></param> /// <param name="s"></param> /// <param name="ParentFolderName"></param> private bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName) { bool res = true; string[] folders, filenames; ZipEntry entry = null; FileStream fs = null; Crc32 crc = new Crc32(); try { //创建当前文件夹 entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/")); //加上 “/” 才会当成是文件夹创建 s.PutNextEntry(entry); s.Flush(); //先压缩文件，再递归压缩文件夹 filenames = Directory.GetFiles(FolderToZip); foreach (string file in filenames) { //打开压缩文件 fs = File.OpenRead(file); byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file))); entry.DateTime = DateTime.Now; entry.Size = fs.Length; fs.Close(); crc.Reset(); crc.Update(buffer); entry.Crc = crc.Value; s.PutNextEntry(entry); s.Write(buffer, 0, buffer.Length); } } catch { res = false; } finally { if (fs != null) { fs.Close(); fs = null; } if (entry != null) entry = null; GC.Collect(); GC.Collect(1); } folders = Directory.GetDirectories(FolderToZip); foreach (string folder in folders) { if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip)))) return false; } return res; } #endregion #region ZipFileDictory /// <summary> /// 压缩目录 /// </summary> /// <param name="FolderToZip">待压缩的文件夹，全路径格式</param> /// <param name="ZipedFile">压缩后的文件名，全路径格式</param> /// <returns></returns> private string ZipFileDictory(string FolderToZip, string ZipedFile, string Password) { bool res; if (!Directory.Exists(FolderToZip)) return "错误"; ZipOutputStream s = new ZipOutputStream(File.Create(@""+FolderToZip+".zip")); s.SetLevel(6); if (!string.IsNullOrEmpty(Password.Trim())) s.Password = Password.Trim(); res = ZipFileDictory(FolderToZip, s, ""); s.Finish(); s.Close(); if (res) { return ZipedFile; } else { return null; } } #endregion #region ZipFile /// <summary> /// 压缩文件 /// </summary> /// <param name="FileToZip">要进行压缩的文件名</param> /// <param name="ZipedFile">压缩后生成的压缩文件名</param> /// <returns></returns> private string ZipFile(string FileToZip, string ZipedFile, string Password) { //如果文件没有找到，则报错 if (!File.Exists(FileToZip)) throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!"); //FileStream fs = null; FileStream ZipFile = null; ZipOutputStream ZipStream = null; ZipEntry ZipEntry = null; string res; try { ZipFile = File.OpenRead(FileToZip); byte[] buffer = new byte[ZipFile.Length]; ZipFile.Read(buffer, 0, buffer.Length); ZipFile.Close(); ZipFile = File.Create(ZipedFile); ZipStream = new ZipOutputStream(ZipFile); if (!string.IsNullOrEmpty(Password.Trim())) ZipStream.Password = Password.Trim(); ZipEntry = new ZipEntry(Path.GetFileName(FileToZip)); ZipStream.PutNextEntry(ZipEntry); ZipStream.SetLevel(6); ZipStream.Write(buffer, 0, buffer.Length); } catch { res = "错误"; } finally { if (ZipEntry != null) { ZipEntry = null; } if (ZipStream != null) { ZipStream.Finish(); ZipStream.Close(); } if (ZipFile != null) { ZipFile.Close(); ZipFile = null; } GC.Collect(); GC.Collect(1); } return "成功"; } #endregion #region Zip /// <summary> /// 压缩文件 和 文件夹 /// </summary> /// <param name="FileToZip">待压缩的文件或文件夹，全路径格式</param> /// <param name="ZipedFile">压缩后生，全路成的压缩文件名径格式</param> /// <param name="Password">压缩密码</param> /// <returns></returns> public string Zip(string FileToZip, string ZipedFile, string Password) { if (Directory.Exists(FileToZip)) { return ZipFileDictory(FileToZip, ZipedFile, Password); } else if (File.Exists(FileToZip)) { return ZipFile(FileToZip, ZipedFile, Password); } else { return "失败"; } } /// <summary> /// 压缩文件 和 文件夹 /// </summary> /// <param name="FileToZip">待压缩的文件或文件夹，全路径格式</param> /// <param name="ZipedFile">压缩后生成的压缩文件名，全路径格式</param> /// <returns></returns> public string Zip(string FileToZip, string ZipedFile) { return Zip(FileToZip, ZipedFile, ""); } #endregion }
类使用方法：
protected void Page_Load(object sender, EventArgs e) { if (!Page.IsPostBack) { Firstload(); ResponseFile(); } }
/// <summary> /// 输出文件流 /// </summary> protected void ResponseFile() { Response.ContentType = "application/x-zip-compressed"; Response.AddHeader("Content-Disposition", "attachment;filename=CurriculumDocument.zip"); string filename = Webpath+".zip"; Response.TransmitFile(filename); //输出文件流之后删除服务器中文件夹 if (Directory.Exists(Webpath)) { Directory.Delete(Webpath, true); //true为递归删除子文件内容 } } public string FileName = ""; public string Webpath = ""; /// <summary> /// 页面第一次加载时开始获取文件压缩 /// </summary> /// <returns></returns> private string Firstload() { //当前目录下新建文件夹 Webpath = Server.MapPath("./CurriculumFiles/下载文件/" + DateTime.Now.Year + DateTime.Now.Month + DateTime.Now.Day + DateTime.Now.Hour + DateTime.Now.Second + DateTime.Now.Millisecond); //文件名称 FileName = DateTime.Now.Year.ToString() + DateTime.Now.Month + DateTime.Now.Day + DateTime.Now.Hour + DateTime.Now.Second + DateTime.Now.Millisecond; //判断文件夹是否存在 if (Directory.Exists(Webpath)) { //true为递归删除子文件内容 Directory.Delete(Webpath, true); Directory.CreateDirectory(Webpath); } else if (!Directory.Exists(Webpath)) { Directory.CreateDirectory(Webpath); } //将要下载的文件copy到新的文件夹中 List<string> DocumentNames_List = GetDocumentNames(ClassID); for (int i = 0; i < DocumentNames_List.Count;i++) { //获取服务器中CurriculumFiles目录下的文件及其路径 string DocumentFileName=Server.MapPath("./CurriculumFiles/" + DocumentNames_List[i] + ""); //判断文件是否存在 if (File.Exists(DocumentFileName)) { File.Copy(DocumentFileName, Webpath + "\\" + "" + DocumentNames_List[i] + "", true); } } //压缩文件 ZipClass zipClass = new ZipClass(); return zipClass.Zip(Webpath, FileName); }
原文：http://www.cnblogs.com/ly77461/p/5719102.html
