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C# 利用ICSharpCode.SharpZipLib.dll 实现压缩和解压缩文件

时间:2021-02-19 15:08:36

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C# 利用ICSharpCode.SharpZipLib.dll 实现压缩和解压缩文件

我们 开发时经常会遇到需要压缩文件的需求,利用C#的开源组件ICSharpCode.SharpZipLib,

就可以很容易的实现压缩和解压缩功能.

压缩文件:

/// <summary> /// 压缩指定文件生成ZIP文件 /// </summary> /// <param name="topDirName">顶层文件夹名称</param> /// <param name="fileNamesToZip">待压缩文件列表</param> /// <param name="ZipedFileName">ZIP文件</param> /// <param name="CompressionLevel">压缩比</param> /// <param name="password">密码</param> /// <param name="comment">压缩文件注释文字</param> public static void ZipFile(string topDirName, string fileNameToZip, string ZipedFileName, int CompressionLevel, string password,string comment ){var ls = new List<string> { fileNameToZip };ZipFile(topDirName, ls.ToArray(), ZipedFileName, CompressionLevel, password, comment);}/// <summary> /// 压缩指定文件生成ZIP文件 /// </summary> /// <param name="topDirName">顶层文件夹名称</param> /// <param name="fileNamesToZip">待压缩文件列表</param> /// <param name="ZipedFileName">ZIP文件</param> /// <param name="CompressionLevel">压缩比</param> /// <param name="password">密码</param> /// <param name="comment">压缩文件注释文字</param> public static void ZipFile(string topDirName, string[] fileNamesToZip, string ZipedFileName, int CompressionLevel, string password,string comment ){using (var s = new ZipOutputStream(File.Open(ZipedFileName, FileMode.Create))){if (password != null && password.Length > 0)s.Password = password;if (comment != null && comment.Length > 0)s.SetComment(comment);s.SetLevel(CompressionLevel); // 0 - means store only to 9 - means best compression foreach (string file in fileNamesToZip){using (FileStream fs = File.OpenRead(topDirName + file)){ //打开待压缩文件 byte[] buffer = new byte[fs.Length];fs.Read(buffer, 0, buffer.Length);//读取文件流 ZipEntry entry = new ZipEntry(file); //新建实例 entry.DateTime = DateTime.Now;entry.Size = fs.Length;s.PutNextEntry(entry);s.Write(buffer, 0, buffer.Length);}}s.Finish();}}

解压文件:

/// <summary> /// 解压缩ZIP文件到指定文件夹 /// </summary> /// <param name="zipfileName">ZIP文件</param> /// <param name="UnZipDir">解压文件夹</param> /// <param name="password">压缩文件密码</param> public static void UnZipFile(string zipfileName, string UnZipDir, string password){using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipfileName))){if (!string.IsNullOrWhiteSpace(password))s.Password = password;try{ZipEntry theEntry;while ((theEntry = s.GetNextEntry()) != null){string directoryName = Path.GetDirectoryName(UnZipDir);string pathname = Path.GetDirectoryName(theEntry.Name);string fileName = Path.GetFileName(theEntry.Name);//生成解压目录 pathname = pathname.Replace(":", "$");//处理压缩时带有盘符的问题 directoryName = directoryName + "\\" + pathname;Directory.CreateDirectory(directoryName);if (fileName != String.Empty){//解压文件到指定的目录 using (var streamWriter = File.Create(directoryName + "\\" + fileName)){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;}}streamWriter.Flush();}}}}catch (Exception eu){throw eu;}}}

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