网站正能量晚上下载直接进入/腾讯朋友圈广告代理

System.IO.Compression命名空间包含如下的基本的文件和流压缩和解压缩服务的类型， 还可以使用这些类型来读取和修改压缩文件的内容，主要有以下类：

ZipFile ，ZipArchive ， ZipArchiveEntry ，DeflateStream ， GZipStream 

1.使用 ZipFile 类创建和提取有一个 .zip 文件扩展名的压缩文件：必须引用System.IO.Compression.FileSystem 程序集。

using System;
using System.IO;
using System.IO.Compression;namespace ConsoleApplication
{class Program{static void Main(string[] args){string startPath = @"c:\example\start";string zipPath = @"c:\example\result.zip";string extractPath = @"c:\example\extract";ZipFile.CreateFromDirectory(startPath, zipPath);ZipFile.ExtractToDirectory(zipPath, extractPath);}}
}

　　

2.通过现存的.zip文件的内容重复存档并提取有一个 .txt 扩展名的文件。 它使用 ZipArchive 类访问现有的 .zip 文件与 ZipArchiveEntry 类来检查压缩文件的各个项，必须引用项目的System.IO.Compression.FileSystem 程序集。

using System;
using System.IO;
using System.IO.Compression;namespace ConsoleApplication1
{class Program{static void Main(string[] args){string zipPath = @"c:\example\start.zip";string extractPath = @"c:\example\extract";using (ZipArchive archive = ZipFile.OpenRead(zipPath)){foreach (ZipArchiveEntry entry in archive.Entries){if (entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase)){entry.ExtractToFile(Path.Combine(extractPath, entry.FullName));}}} }}
}

 

3.使用 ZipArchive 类访问现有的 .zip 文件，然后添加新文件到压缩文件。 当添加到现有的 .zip 文件时，新文件获取压缩。

namespace ConsoleApplication
{class Program{static void Main(string[] args){using (FileStream zipToOpen = new FileStream(@"c:\users\exampleuser\release.zip", FileMode.Open)){using (ZipArchive archive = new ZipArchive(zipToOpen, ZipArchiveMode.Update)){ZipArchiveEntry readmeEntry = archive.CreateEntry("Readme.txt");using (StreamWriter writer = new StreamWriter(readmeEntry.Open())){writer.WriteLine("Information about this package.");writer.WriteLine("========================");}}}}}
}

　　

4.使用 GZipStream 和 DeflateStream 类压缩和解压缩数据。 它们使用相同的压缩算法。 写入文件扩展名为 .gz 的压缩GZipStream 对象可以通过使用许多常用工具，除了 GZipStream提供的方法之外，被解压

public class Program{private static string directoryPath = @"c:\temp";public static void Main(){DirectoryInfo directorySelected = new DirectoryInfo(directoryPath);Compress(directorySelected);foreach (FileInfo fileToDecompress in directorySelected.GetFiles("*.gz")){Decompress(fileToDecompress);}}public static void Compress(DirectoryInfo directorySelected){foreach (FileInfo fileToCompress in directorySelected.GetFiles()){using (FileStream originalFileStream = fileToCompress.OpenRead()){if ((File.GetAttributes(fileToCompress.FullName) & FileAttributes.Hidden) != FileAttributes.Hidden & fileToCompress.Extension != ".gz"){using (FileStream compressedFileStream = File.Create(fileToCompress.FullName + ".gz")){using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionMode.Compress)){originalFileStream.CopyTo(compressionStream);}}FileInfo info = new FileInfo(directoryPath + "\\" + fileToCompress.Name + ".gz");Console.WriteLine("Compressed {0} from {1} to {2} bytes.",fileToCompress.Name, fileToCompress.Length.ToString(), info.Length.ToString());}}}}public static void Decompress(FileInfo fileToDecompress){using (FileStream originalFileStream = fileToDecompress.OpenRead()){string currentFileName = fileToDecompress.FullName;string newFileName = currentFileName.Remove(currentFileName.Length - fileToDecompress.Extension.Length);using (FileStream decompressedFileStream = File.Create(newFileName)){using (GZipStream decompressionStream = new GZipStream(originalFileStream, CompressionMode.Decompress)){decompressionStream.CopyTo(decompressedFileStream);Console.WriteLine("Decompressed: {0}", fileToDecompress.Name);}}}}

　　

【原文出处】 http://www.51aras.com/?id=6