大家可以到http://www.icsharpcode.net/opensource/sharpziplib/ 下载SharpZiplib的最新版本，本文使用的版本为0.86.0.518，支持Zip, GZip, BZip2 和Tar格式，其实没啥好说的直接上代码
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/// <summary> /// Zip压缩与解压缩 /// </summary> public class ZipHelper { /// <summary> /// 压缩单个文件 /// </summary> /// <param name="fileToZip">要压缩的文件</param> /// <param name="zipedFile">压缩后的文件</param> /// <param name="compressionLevel">压缩等级</param> /// <param name="blockSize">每次写入大小</param> public static void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize) { //如果文件没有找到，则报错 if (!System.IO.File.Exists(fileToZip)) { throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!"); } using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile)) { using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile)) { using (System.IO.FileStream StreamToZip = new System.IO.FileStream(fileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read)) { string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1); ZipEntry ZipEntry = new ZipEntry(fileName); ZipStream.PutNextEntry(ZipEntry); ZipStream.SetLevel(compressionLevel); byte[] buffer = new byte[blockSize]; int sizeRead = 0; try { do { sizeRead = StreamToZip.Read(buffer, 0, buffer.Length); ZipStream.Write(buffer, 0, sizeRead); } while (sizeRead > 0); } catch (System.Exception ex) { throw ex; } StreamToZip.Close(); } ZipStream.Finish(); ZipStream.Close(); } ZipFile.Close(); } } /// <summary> /// 压缩单个文件 /// </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> public static void ZipFile(string fileToZip, string zipedFile) { //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!"); } using (FileStream fs = File.OpenRead(fileToZip)) { byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); fs.Close(); using (FileStream ZipFile = File.Create(zipedFile)) { using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile)) { string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1); ZipEntry ZipEntry = new ZipEntry(fileName); ZipStream.PutNextEntry(ZipEntry); ZipStream.SetLevel(5); ZipStream.Write(buffer, 0, buffer.Length); ZipStream.Finish(); ZipStream.Close(); } } } } /// <summary> /// 压缩多层目录 /// </summary> /// <param name="strDirectory">The directory.</param> /// <param name="zipedFile">The ziped file.</param> public static void ZipFileDirectory(string strDirectory, string zipedFile) { using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile)) { using (ZipOutputStream s = new ZipOutputStream(ZipFile)) { ZipSetp(strDirectory, s, ""); } } } /// <summary> /// 递归遍历目录 /// </summary> /// <param name="strDirectory">The directory.</param> /// <param name="s">The ZipOutputStream Object.</param> /// <param name="parentPath">The parent path.</param> private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath) { if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar) { strDirectory += Path.DirectorySeparatorChar; } Crc32 crc = new Crc32(); string[] filenames = Directory.GetFileSystemEntries(strDirectory); foreach (string file in filenames)// 遍历所有的文件和目录 { if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件 { string pPath = parentPath; pPath += file.Substring(file.LastIndexOf("\\") + 1); pPath += "\\"; ZipSetp(file, s, pPath); } else // 否则直接压缩文件 { //打开压缩文件 using (FileStream fs = File.OpenRead(file)) { byte[] buffer = new byte[fs.Length]; fs.Read(buffer, 0, buffer.Length); string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + 1); ZipEntry entry = new ZipEntry(fileName); 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); } } } } /// <summary> /// 解压缩一个 zip 文件。 /// </summary> /// <param name="zipedFile">The ziped file.</param> /// <param name="strDirectory">The STR directory.</param> /// <param name="password">zip 文件的密码。</param> /// <param name="overWrite">是否覆盖已存在的文件。</param> public void UnZip(string zipedFile, string strDirectory, string password, bool overWrite) { if (strDirectory == "") strDirectory = Directory.GetCurrentDirectory(); if (!strDirectory.EndsWith("\\")) strDirectory = strDirectory + "\\"; using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipedFile))) { s.Password = password; ZipEntry theEntry; while ((theEntry = s.GetNextEntry()) != null) { string directoryName = ""; string pathToZip = ""; pathToZip = theEntry.Name; if (pathToZip != "") directoryName = Path.GetDirectoryName(pathToZip) + "\\"; string fileName = Path.GetFileName(pathToZip); Directory.CreateDirectory(strDirectory + directoryName); if (fileName != "") { if ((File.Exists(strDirectory + directoryName + fileName) && overWrite) || (!File.Exists(strDirectory + directoryName + fileName))) { using (FileStream streamWriter = File.Create(strDirectory + directoryName + fileName)) { int size = 2048; byte[] data = new byte[2048]; while (true) { size = s.Read(data, 0, data.Length); if (size > 0) streamWriter.Write(data, 0, size); else break; } streamWriter.Close(); } } } } s.Close(); } } } |
代码来自网络，略作修改，修改为静态方法，修改文件夹递归压缩时的bug..
转自：http://www.cnblogs.com/xuanye/archive/2011/10/19/2217211.html