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http://www.icsharpcode.net/OpenSource/SharpZipLib/Default.aspx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<string> result = new List<string>(); 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<string> result = new List<string>();
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
}
}