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

 1 class ZipClass

 2 {

 3 public void UnZip(string zipFilePath, string unZipDir)

 4 {

 5 if (zipFilePath == string.Empty)

 6 {

 7 throw new Exception("压缩文件不能为空！");

 8 }

 9 if (!File.Exists(zipFilePath))

10 {

11 throw new System.IO.FileNotFoundException("压缩文件不存在！");

12 }

13 //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 

14 if (unZipDir == string.Empty)

15 unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));

16 if (!unZipDir.EndsWith("//"))

17 unZipDir += "//";

18 if (!Directory.Exists(unZipDir))

19 Directory.CreateDirectory(unZipDir);

20 

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

22 {

23 

24 ZipEntry theEntry;

25 while ((theEntry = s.GetNextEntry()) != null)

26 {

27 string directoryName = Path.GetDirectoryName(theEntry.Name);

28 string fileName = Path.GetFileName(theEntry.Name);

29 if (directoryName.Length > 0)

30 {

31 Directory.CreateDirectory(unZipDir + directoryName);

32 }

33 if (!directoryName.EndsWith("//"))

34 directoryName += "//";

35 if (fileName != String.Empty)

36 {

37 using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))

38 {

39 

40 int size = 2048;

41 byte[] data = new byte[2048];

42 while (true)

43 {

44 size = s.Read(data, 0, data.Length);

45 if (size > 0)

46 {

47 streamWriter.Write(data, 0, size);

48 }

49 else

50 {

51 break;

52 }

53 }

54 }

55 }

56 }

57 }

58 }

59 

60  

61 

62 public static void ZipDir(string sDir, string sZip, ZipOutputStream s)

63 {

64 string[] filenames = Directory.GetFiles(sDir);

65 string[] dirnames = Directory.GetDirectories(sDir);

66 Crc32 crc = new Crc32();

67 if (s == null)

68 {

69 s = new ZipOutputStream(File.Create(sZip));

70 s.SetLevel(6); // 0 - store only to 9 - means best compression

71 }

72 

73 

74 foreach (string file in filenames)

75 fileZipInStream(file, s);

76 

77 foreach (string dir in dirnames)

78 ZipDir(dir, "", s);

79 if (sZip != "")

80 {

81 s.Finish();

82 s.Close();

83 

84 FileInfo fInfo = new FileInfo(sZip);

85 long size = fInfo.Length;

86 //Log.WriteLogD("----------------" + size.ToString());

87 if (size < 100) 

88 File.Delete(sZip);

89 }

90 }

91 

92 }

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