zip (ICSharpCode.SharpZipLib.dll文件亟需下载)

 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 else50 {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 compression71 }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 }