zip (ICSharpCode.SharpZipLib.dll文件需要下载)

ZipClass zc=new ZipClass ();
zc.ZipDir(@"E:\1\新建文件夹", @"E:\1\新建文件夹.zip", 1);//压缩
zc.UnZip(@"E:\1\新建文件夹.zip",@"E:\1\2222");//解压

　　cs

 class ZipClass
 {
 public void UnZip(string zipFilePath, string unZipDir)
 {
 if (zipFilePath == string.Empty)
 {
 throw new Exception("压缩文件不能为空！");
 }
 if (!File.Exists(zipFilePath))
 {
 throw new System.IO.FileNotFoundException("压缩文件不存在！");
 }
 //解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹
 if (unZipDir == string.Empty)
 unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
 if (!unZipDir.EndsWith("//"))
 unZipDir += "//";
 if (!Directory.Exists(unZipDir))
 Directory.CreateDirectory(unZipDir);

 using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))
 {

 ZipEntry theEntry;
 while ((theEntry = s.GetNextEntry()) != null)
 {
 string directoryName = Path.GetDirectoryName(theEntry.Name);
 string fileName = Path.GetFileName(theEntry.Name);
 if (directoryName.Length > )
 {
 Directory.CreateDirectory(unZipDir + directoryName);
 }
 if (!directoryName.EndsWith("//"))
 directoryName += "//";
 if (fileName != String.Empty)
 {
 using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))
 {

 int size = ;
 byte[] data = new byte[];
 while (true)
 {
 size = s.Read(data, , data.Length);
 if (size > )
 {
 streamWriter.Write(data, , size);
 }
 else
 {
 break;
 }
 }
 }
 }
 }
 }
 }

 public static void ZipDir(string sDir, string sZip, ZipOutputStream s)
 {
 string[] filenames = Directory.GetFiles(sDir);
 string[] dirnames = Directory.GetDirectories(sDir);
 Crc32 crc = new Crc32();
 if (s == null)
 {
 s = new ZipOutputStream(File.Create(sZip));
 s.SetLevel(); // 0 - store only to 9 - means best compression
 }

 foreach (string file in filenames)
 fileZipInStream(file, s);

 foreach (string dir in dirnames)
 ZipDir(dir, "", s);
 if (sZip != "")
 {
 s.Finish();
 s.Close();

 FileInfo fInfo = new FileInfo(sZip);
 long size = fInfo.Length;
 //Log.WriteLogD("----------------" + size.ToString());
 if (size < )
 File.Delete(sZip);
 }
 }

 }

ICSharpCode.SharpZipLib.dll下载地址：http://i.cnblogs.com/Files.aspx

感谢提供此类的朋友