C# 文件压缩与解压(ZIP格式)

Hello，大家好，我是网呦，今天分享的内容是：C#操作文件压缩与解压(zip格式)。该文章Core Code 引用于：C#文件压缩与解压

在企业开发过程中经常会遇到文件的压缩与解压，虽然网上很多流行的压缩文件格式都是RAR的，但是由于RAR不是一个开放的标准，因此ZIP成了更多人的选择。如果你不想自己开发的话可以选择开源的项目，比如SharpZipLib就是一个不错的选择。

我在引用的程序上，做了优化，现在贴出来。

注意：如果你想运行起来，必须要来下载我提供的整个解决方案(含有两个项目：ISharpZipLib和TestConsole)

关于如何下载，可以到上面的引用地址下载，也可以留下邮箱，我发给你。

TestConsole调用的代码如下：

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");

Console.WriteLine("Decompressioning the zip file.please wait for serval seconds.");
UnZipFile(@"C:\Users\Administrator\Desktop\Print.zip",
@"C:\Users\Administrator\Desktop\Temps\CodeTemp\c#\CSharpZip\TestConsole\bin\Debug");
Console.WriteLine("Decompressioned.");
Console.ReadKey();
}

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); // 压缩级别 0-9
//s.Password = "123"; //Zip压缩文件密码
byte[] buffer = new byte[4096]; //缓冲区大小
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);
}
}

/// <summary>
/// Decompression the zip file
/// </summary>
/// <param name="zipFilePath">the source path of the zip file</param>
/// <param name="savePath">What path you want to save the directory that was decompressioned</param>
private static void UnZipFile(string zipFilePath, string savePath)
{
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)
{

string fullPath = JudgeFullPath(savePath) + theEntry.Name;
Console.WriteLine(fullPath);

string directoryName = Path.GetDirectoryName(fullPath);
string fileName = Path.GetFileName(fullPath);

//if (String.IsNullOrEmpty(savePath))
//{
//    directoryName = savePath + "/"+directoryName;
//}
// create directory
if (directoryName.Length > 0)
{
Directory.CreateDirectory(directoryName);
}

if (fileName != String.Empty)
{
using (FileStream streamWriter = File.Create(fullPath))
{

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;
}
}
}
}
}
}
}

/// <summary>
/// Judge the last symbol of the full path wether is "/" or not.
/// </summary>
/// <param name="_path"></param>
/// <returns></returns>
private static string JudgeFullPath(string _path)
{
if (!string.IsNullOrEmpty(_path) && _path.Length>4)
{
string lastSymbol = _path.Substring(_path.Length - 1);
if (lastSymbol == "\\")
{
return _path;
}
return _path+"\\";
}
return _path;
}
}

}