C# 下利用ICSharpCode.SharpZipLib.dll实现文件/文件夹压缩、解压缩

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1、压缩某个指定目录下日志，将日志压缩到CompressionDirectory文件夹中，并清除原来未压缩日志。

 #region 压缩logs目录下日志

 public static void CompresslogDic()

 string logFilePath = AppDomain.CurrentDomain.BaseDirectory + "logs";

 DirectoryInfo logsDic = new DirectoryInfo(logFilePath);

 FileInfo[] bipLog = logsDic.GetFiles();

 DateTime dt = DateTime.Now;

 List FileInfo logsInOneDay = new List FileInfo 

 for (int i = 0; i bipLog.Length; i++)

 if (bipLog[i].Name.Substring(bipLog[i].Name.Length - 3) != "zip")

 logsInOneDay.Add(bipLog[i]);

 if (logsInOneDay.Count 0)

 if (!Directory.Exists(logsDic.FullName + "\\CompressionDirectory"))

 Directory.CreateDirectory(logsDic.FullName + "\\CompressionDirectory");

 string compressFileName = dt.ToString("yyyy-MM-dd");

 if (File.Exists(logsDic.FullName + "\\CompressionDirectory\\" + dt.ToString("yyyy-MM-dd") + ".zip"))

 Guid guid = Guid.NewGuid();

 compressFileName = compressFileName + "-" + guid.ToString();

 compressFileName += ".zip";

 Compress(logsInOneDay, logsDic.FullName + "\\CompressionDirectory\\" + compressFileName, 9, 100);

 foreach (FileInfo fileInfo in logsInOneDay)

 fileInfo.Delete();

 catch (Exception e)

 //错误信息记录处理

 catch (Exception e)

 //错误信息记录处理

 catch (Exception e)

 //错误信息记录处理

 #endregion

2、压缩指定目录子目录下日志，将日志压缩到CompressionDirectory文件夹中，并清除原来未压缩日志。

 #region 压缩logs子目录下日志

 public static void CompresslogsDic()

 string logFilePath = AppDomain.CurrentDomain.BaseDirectory + "logs"; 

 DirectoryInfo logsDic = new DirectoryInfo(logFilePath);

 FileInfo[] bipLog = logsDic.GetFiles();

 DateTime dt = DateTime.Now;

 DirectoryInfo[] subLosgDic = logsDic.GetDirectories();

 foreach (DirectoryInfo bankDic in subLosgDic)

 dt = DateTime.Now;

 bipLog = bankDic.GetFiles();

 List FileInfo logsInOneDay = new List FileInfo 

 for (int i = 0; i bipLog.Length; i++)

 if (bipLog[i].Name.Substring(bipLog[i].Name.Length - 3) != "zip")

 logsInOneDay.Add(bipLog[i]);

 if (logsInOneDay.Count 0)

 if (!Directory.Exists(bankDic.FullName + "\\CompressionDirectory"))

 Directory.CreateDirectory(bankDic.FullName + "\\CompressionDirectory");

 string compressFileName = dt.ToString("yyyy-MM-dd");

 if (File.Exists(bankDic.FullName + "\\CompressionDirectory\\" + dt.ToString("yyyy-MM-dd") + ".zip"))

 Guid guid = Guid.NewGuid();

 compressFileName = compressFileName + "-" + guid.ToString();

 compressFileName += ".zip";

 Compress(logsInOneDay, bankDic.FullName + "\\CompressionDirectory\\" + compressFileName, 9, 100);

 foreach (FileInfo fileInfo in logsInOneDay)

 fileInfo.Delete();

 catch (Exception e)

 //错误信息记录处理

 catch (Exception e)

 //错误信息记录处理

 catch (Exception e)

 //错误信息记录处理

 #endregion

3、压缩文件

 #region 压缩文件

 /// summary 

 /// 压缩文件

 /// /summary 

 /// param name="fileNames" 要打包的文件列表 /param 

 /// param name="GzipFileName" 目标文件名 /param 

 /// param name="CompressionLevel" 压缩品质级别（0~9） /param 

 /// param name="SleepTimer" 休眠时间（单位毫秒） /param 

 public static void Compress(List FileInfo fileNames, string GzipFileName, int CompressionLevel, int SleepTimer)

 ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName));

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

 foreach (FileInfo file in fileNames)

 FileStream fs = null;

 fs = file.Open(FileMode.Open, FileAccess.ReadWrite);

 catch

 continue;

 // 将文件分批读入缓冲区

 byte[] data = new byte[2048];

 int size = 2048;

 ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name));

 entry.DateTime = (file.CreationTime file.LastWriteTime ? file.LastWriteTime : file.CreationTime);

 s.PutNextEntry(entry);

 while (true)

 size = fs.Read(data, 0, size);

 if (size = 0) break;

 s.Write(data, 0, size);

 fs.Close();

 Thread.Sleep(SleepTimer);

 finally

 s.Finish();

 s.Close();

 #endregion

4、解压缩

 #region 解压缩文件

 /// summary 

 /// 解压缩文件

 /// /summary 

 /// param name="GzipFile" 压缩包文件名 /param 

 /// param name="targetPath" 解压缩目标路径 /param 

 public static void Decompress(string GzipFile, string targetPath)

 //string directoryName = Path.GetDirectoryName(targetPath + "//") + "//";

 string directoryName = targetPath;

 if (!Directory.Exists(directoryName)) Directory.CreateDirectory(directoryName);//生成解压目录

 string CurrentDirectory = directoryName;

 byte[] data = new byte[2048];

 int size = 2048;

 ZipEntry theEntry = null;

 using (ZipInputStream s = new ZipInputStream(File.OpenRead(GzipFile)))

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

 if (theEntry.IsDirectory)

 {// 该结点是目录

 if (!Directory.Exists(CurrentDirectory + theEntry.Name)) Directory.CreateDirectory(CurrentDirectory + theEntry.Name);

 else

 if (theEntry.Name != String.Empty)

 //检查多级目录是否存在 

 if (theEntry.Name.Contains("//"))

 string parentDirPath = theEntry.Name.Remove(theEntry.Name.LastIndexOf("//") + 1);

 if (!Directory.Exists(parentDirPath))

 Directory.CreateDirectory(CurrentDirectory + parentDirPath);

 //解压文件到指定的目录

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

 while (true)

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

 if (size = 0) break;

 streamWriter.Write(data, 0, size);

 streamWriter.Close();

 s.Close();

 #endregion

5、压缩文件夹

 #region 压缩文件夹

 /// summary 

 /// 压缩文件夹 

 /// /summary 

 /// param name="dirPath" 要打包的文件夹 /param 

 /// param name="GzipFileName" 目标文件名 /param 

 /// param name="CompressionLevel" 压缩品质级别（0~9） /param 

 /// param name="deleteDir" 是否删除原文件夹 /param 

 public static void CompressDirectory(string dirPath, string GzipFileName, int CompressionLevel, bool deleteDir)

 //压缩文件为空时默认与压缩文件夹同一级目录 

 if (GzipFileName == string.Empty)

 GzipFileName = dirPath.Substring(dirPath.LastIndexOf("//") + 1);

 GzipFileName = dirPath.Substring(0, dirPath.LastIndexOf("//")) + "//" + GzipFileName + ".zip";

 //if (Path.GetExtension(GzipFileName) != ".zip") 

 //{ 

 // GzipFileName = GzipFileName + ".zip"; 

 //} 

 using (ZipOutputStream zipoutputstream = new ZipOutputStream(File.Create(GzipFileName)))

 zipoutputstream.SetLevel(CompressionLevel);

 ICSharpCode.SharpZipLib.Checksums.Crc32 crc = new ICSharpCode.SharpZipLib.Checksums.Crc32();

 Dictionary string, DateTime fileList = GetAllFies(dirPath);

 foreach (KeyValuePair string, DateTime item in fileList)

 FileStream fs = File.OpenRead(item.Key.ToString());

 byte[] buffer = new byte[fs.Length];

 fs.Read(buffer, 0, buffer.Length);

 ZipEntry entry = new ZipEntry(item.Key.Substring(dirPath.Length));

 entry.DateTime = item.Value;

 entry.Size = fs.Length;

 fs.Close();

 crc.Reset();

 crc.Update(buffer);

 entry.Crc = crc.Value;

 zipoutputstream.PutNextEntry(entry);

 zipoutputstream.Write(buffer, 0, buffer.Length);

 if (deleteDir)

 Directory.Delete(dirPath, true);

 #endregion

6、获取传递目录参数Dir下所有文件（EG:GetAllFies(@"F:\WorkSpace")获取F盘WorkSpace目录下所有文件）

 #region 获取所有文件

 /// summary 

 /// 获取所有文件 

 /// /summary 

 /// returns /returns 

 private static Dictionary string, DateTime GetAllFies(string dir)

 Dictionary string, DateTime FilesList = new Dictionary string, DateTime 

 DirectoryInfo fileDire = new DirectoryInfo(dir);

 if (!fileDire.Exists)

 throw new System.IO.FileNotFoundException("目录:" + fileDire.FullName + "没有找到!");

 GetAllDirFiles(fileDire, FilesList);

 GetAllDirsFiles(fileDire.GetDirectories(), FilesList);

 return FilesList;

 #endregion

7、获取一个文件夹下的所有文件夹里的文件

 #region 获取一个文件夹下的所有文件夹里的文件

 /// summary 

 /// 获取一个文件夹下的所有文件夹里的文件 

 /// /summary 

 /// param name="dirs" /param 

 /// param name="filesList" /param 

 private static void GetAllDirsFiles(DirectoryInfo[] dirs, Dictionary string, DateTime filesList) 

 foreach (DirectoryInfo dir in dirs) 

 foreach (FileInfo file in dir.GetFiles("*.*")) 

 filesList.Add(file.FullName, file.LastWriteTime); 

 GetAllDirsFiles(dir.GetDirectories(), filesList); 

 #endregion

8、获取一个文件夹下的文件

 #region 获取一个文件夹下的文件

 /// summary 

 /// 获取一个文件夹下的文件 

 /// /summary 

 /// param name="dir" 目录名称 /param 

 /// param name="filesList" 文件列表HastTable /param 

 private static void GetAllDirFiles(DirectoryInfo dir, Dictionary string, DateTime filesList) 

 foreach (FileInfo file in dir.GetFiles("*.*")) 

 filesList.Add(file.FullName, file.LastWriteTime); 

 #endregion 

未能加载文件或程序集 ICSharpCode.SharpZipLib 错误信息： 在生成项目时提示以下信息： 错误 3 未能加载文件或程序集“ICSharpCode.SharpZipLib, Version=0.85.0.0, Culture=neutral, PublicKeyToken=ad1060f781377a81”或它的某一个依赖项。
本文介绍pclzip解压文件、压缩文件和列出压缩文件的列表多种示例方法，这是一个非常常用的功能，有时候需要用到压缩或解压，这个demo就是亲测过的。