本文實例講述了C#實現文件壓縮與解壓的方法。分享給大家供大家參考，具體如下：
在企業開發過程中經常會遇到文件的壓縮與解壓，雖然網上很多流行的壓縮文件格式都是RAR的，但是由于RAR不是一個開放的標準，因此ZIP成了更多人的選擇。如果你不想自己開發的話可以選擇開源的項目，比如SharpZipLib就是一個不錯的選擇。
組件的使用比較簡單，請參照下面的代碼。點擊下載項目源碼。
/* * Gary Zhang -- cbcye@live.com * www.cbcye.com * www.quicklearn.cn * cbcye.cnblogs.com */using System;using System.Collections.Generic;using System.Text;using System.IO;using ICSharpCode.SharpZipLib.Zip;using System.Diagnostics;using ICSharpCode.SharpZipLib.Core;namespace TestConsole{ class Program { static void Main() { //CreateZipFile(@"d:/", @"d:/a.zip"); UnZipFile(@"d:/a.zip"); Console.Read(); } private static void CreateZipFile(string filesPath, string zipFilePath) { if (!Directory.Exists(filesPath)) { Console.WriteLine("Cannot find directory '{0}'", filesPath); return; } try { string[] filenames = Directory.GetFiles(filesPath); using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath))) { s.SetLevel(9); // 壓縮級別 0-9 //s.Password = "123"; //Zip壓縮文件密碼 byte[] buffer = new byte[4096]; //緩沖區大小 foreach (string file in filenames) { ZipEntry entry = new ZipEntry(Path.GetFileName(file)); entry.DateTime = DateTime.Now; s.PutNextEntry(entry); using (FileStream fs = File.OpenRead(file)) { int sourceBytes; do { sourceBytes = fs.Read(buffer, 0, buffer.Length); s.Write(buffer, 0, sourceBytes); } while (sourceBytes > 0); } } s.Finish(); s.Close(); } } catch (Exception ex) { Console.WriteLine("Exception during processing {0}", ex); } } private static void UnZipFile( string zipFilePath) { if (!File.Exists(zipFilePath)) { Console.WriteLine("Cannot find file '{0}'", zipFilePath); return; } using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath))) { ZipEntry theEntry; while ((theEntry = s.GetNextEntry()) != null) { Console.WriteLine(theEntry.Name); string directoryName = Path.GetDirectoryName(theEntry.Name); string fileName = Path.GetFileName(theEntry.Name); // create directory if (directoryName.Length > 0) { Directory.CreateDirectory(directoryName); } if (fileName != String.Empty) { using (FileStream streamWriter = File.Create(theEntry.Name)) { 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; } } } } } } } }}希望本文所述對大家C#程序設計有所幫助。
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