使用开源类库ICSharpCode.SharpZipLib.Zip可以实现压缩与解压缩功能，源代码和DLL可以从下载；
有两种方式可以实现压缩与解压缩，这里只提供了ZIP格式；
1、DLL本身提供的快速压缩与解压缩，直接代码：
using System;using ICSharpCode.SharpZipLib.Zip;namespace Zip{ public static class FastZipHelper { #region CreateZipFile public static bool CreateZip(string zipFileName, string sourceDirectory, bool recurse, string fileFilter, string directoryFilter, bool createEmptyDirectories, bool restoreAttributesOnExtract, bool restoreDateTimeOnExtract) { try { FastZip fastZip = new FastZip(); fastZip.CreateEmptyDirectories = createEmptyDirectories; fastZip.RestoreAttributesOnExtract = restoreAttributesOnExtract; fastZip.RestoreDateTimeOnExtract = restoreDateTimeOnExtract; fastZip.CreateZip(zipFileName, sourceDirectory, recurse, fileFilter, directoryFilter); return true; } catch (Exception ex) { return false; } } public static bool CreateZip(string zipFileName, string sourceDirectory, bool recurse, string fileFilter, string directoryFilter, bool createEmptyDirectories) { return CreateZip(zipFileName, sourceDirectory, recurse, fileFilter, directoryFilter, createEmptyDirectories, true, true); } public static bool CreateZip(string zipFileName, string sourceDirectory, bool recurse, string fileFilter, string directoryFilter) { return CreateZip(zipFileName, sourceDirectory, recurse, fileFilter, directoryFilter, true); } public static bool CreateZip(string zipFileName, string sourceDirectory, bool recurse, string fileFilter) { return CreateZip(zipFileName, sourceDirectory, recurse, fileFilter, string.Empty); } public static bool CreateZip(string zipFileName, string sourceDirectory, bool recurse) { return CreateZip(zipFileName, sourceDirectory, recurse, string.Empty); } public static bool CreateZip(string zipFileName, string sourceDirectory) { return CreateZip(zipFileName, sourceDirectory, true); } #endregion #region ExtractZip public static bool ExtractZip(string zipFileName, string targetDirectory, FastZip.Overwrite overwrite, FastZip.ConfirmOverwriteDelegate confirmDelegate, string fileFilter, string directoryFilter, bool restoreDateTime, bool createEmptyDirectories, bool restoreAttributesOnExtract, bool restoreDateTimeOnExtract) { try { FastZip fastZip = new FastZip(); fastZip.CreateEmptyDirectories = createEmptyDirectories; fastZip.RestoreAttributesOnExtract = restoreAttributesOnExtract; fastZip.RestoreDateTimeOnExtract = restoreDateTimeOnExtract; fastZip.ExtractZip(zipFileName, targetDirectory, overwrite, confirmDelegate, fileFilter, directoryFilter, restoreDateTime); return true; } catch (Exception ex) { return false; } } public static bool ExtractZip(string zipFileName, string targetDirectory, FastZip.Overwrite overwrite, FastZip.ConfirmOverwriteDelegate confirmDelegate, string fileFilter, string directoryFilter, bool restoreDateTime, bool createEmptyDirectories) { return ExtractZip(zipFileName, targetDirectory, overwrite, confirmDelegate, fileFilter, directoryFilter, restoreDateTime, createEmptyDirectories, true, true); } public static bool ExtractZip(string zipFileName, string targetDirectory, FastZip.Overwrite overwrite, FastZip.ConfirmOverwriteDelegate confirmDelegate, string fileFilter, string directoryFilter, bool restoreDateTime) { return ExtractZip(zipFileName, targetDirectory, overwrite, confirmDelegate, fileFilter, directoryFilter, restoreDateTime, true); } public static bool ExtractZip(string zipFileName, string targetDirectory, FastZip.Overwrite overwrite, FastZip.ConfirmOverwriteDelegate confirmDelegate, string fileFilter, string directoryFilter) { return ExtractZip(zipFileName, targetDirectory, overwrite, confirmDelegate, fileFilter, directoryFilter, true); } public static bool ExtractZip(string zipFileName, string targetDirectory, FastZip.Overwrite overwrite, FastZip.ConfirmOverwriteDelegate confirmDelegate, string fileFilter) { return ExtractZip(zipFileName, targetDirectory, overwrite, confirmDelegate, fileFilter, string.Empty); } public static bool ExtractZip(string zipFileName, string targetDirectory) { return ExtractZip(zipFileName, targetDirectory, string.Empty); } public static bool ExtractZip(string zipFileName, string targetDirectory, string fileFilter) { return ExtractZip(zipFileName, targetDirectory, FastZip.Overwrite.Always, null, fileFilter); } #endregion }}
2、自己实现：
using System;using System.Collections.Generic;using System.IO;using ICSharpCode.SharpZipLib.Zip;namespace Zip{ public static class ZipHelper { public static string[] GetDirectories(string sourceDirectory) { List result = new List (); string[] directories = Directory.GetDirectories(sourceDirectory); if (directories.Length > 0) { foreach (var directory in directories) { result.Add(directory); result.AddRange(GetDirectories(directory)); } } return result.ToArray(); } public static string[] GetFiles(string sourceDirectory) { List result = new List (); result.AddRange(Directory.GetFiles(sourceDirectory)); string[] directories = Directory.GetDirectories(sourceDirectory); if (directories.Length > 0) { foreach (var directory in directories) { result.AddRange(GetFiles(directory)); } } return result.ToArray(); } #region CreateZipFile public static void CreateZip(string sourceDirectory) { CreateZip(sourceDirectory, null); } public static void CreateZip(string sourceDirectory, string zipFileName) { if (string.IsNullOrEmpty(sourceDirectory)) { throw new ArgumentNullException("sourceDirectory", "sourceDirectory can not be null or empty."); } if (!Directory.Exists(sourceDirectory)) { throw new DirectoryNotFoundException(sourceDirectory + " can not be found."); } if (string.IsNullOrEmpty(zipFileName)) { zipFileName = sourceDirectory.TrimEnd('\\').TrimEnd('/') + ".zip"; } // Depending on the directory this could be very large and would require more attention // in a commercial package. //string[] filenames = Directory.GetFiles(sourceDirectory); string[] directories = GetDirectories(sourceDirectory); string[] filenames = GetFiles(sourceDirectory); if (!Directory.Exists(Path.GetDirectoryName(zipFileName))) { Directory.CreateDirectory(Path.GetDirectoryName(zipFileName)); } // 'using' statements guarantee the stream is closed properly which is a big source // of problems otherwise. Its exception safe as well which is great. using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFileName))) { s.SetLevel(9); // 0 - store only to 9 - means best compression ZipEntryFactory factory = new ZipEntryFactory(); foreach (var directory in directories) { string virtualDirectory = directory.Replace(sourceDirectory, string.Empty); ZipEntry zipEntry = factory.MakeDirectoryEntry(virtualDirectory); zipEntry.DateTime = DateTime.Now; s.PutNextEntry(zipEntry); } byte[] buffer = new byte[4096]; foreach (string file in filenames) { // Using GetFileName makes the result compatible with XP // as the resulting path is not absolute. string newfileName = file.Replace(sourceDirectory, string.Empty); ZipEntry entry = factory.MakeFileEntry(newfileName); // Setup the entry data as required. // Crc and size are handled by the library for seakable streams // so no need to do them here. // Could also use the last write time or similar for the file. entry.DateTime = DateTime.Now; s.PutNextEntry(entry); using (FileStream fs = File.OpenRead(file)) { // Using a fixed size buffer here makes no noticeable difference for output // but keeps a lid on memory usage. int sourceBytes; do { sourceBytes = fs.Read(buffer, 0, buffer.Length); s.Write(buffer, 0, sourceBytes); } while (sourceBytes > 0); } } // Finish/Close arent needed strictly as the using statement does this automatically // Finish is important to ensure trailing information for a Zip file is appended. Without this // the created file would be invalid. s.Finish(); // Close is important to wrap things up and unlock the file. s.Close(); } } #endregion #region ExtractZip public static void ExtractZip(string zipFileName) { ExtractZip(zipFileName, null); } public static void ExtractZip(string zipFileName, string targetDirectory) { if (string.IsNullOrEmpty(zipFileName)) { throw new ArgumentNullException("zipFileName", "zipFileName can not be null or empty."); } if (!File.Exists(zipFileName)) { throw new FileNotFoundException(zipFileName + " can not be found."); } if (string.IsNullOrEmpty(targetDirectory)) { targetDirectory = Path.Combine(Path.GetDirectoryName(zipFileName), Path.GetFileNameWithoutExtension(zipFileName)); } using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFileName))) { ZipEntry theEntry; while ((theEntry = s.GetNextEntry()) != null) { //create directory string targetPath = Path.Combine(targetDirectory, theEntry.Name); if (theEntry.IsDirectory) { Directory.CreateDirectory(targetPath); } if (theEntry.IsFile) { if (!Directory.Exists(Path.GetDirectoryName(targetPath))) { Directory.CreateDirectory(Path.GetDirectoryName(targetPath)); } using (FileStream streamWriter = File.Create(targetPath)) { 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; } } } } } } } #endregion }}