本文来自CSDN博客，出处：http://blog.csdn.net/venus0314/archive/2006/09/25/1280610.aspx
一直以来都是采用WinZIP进行压缩的，调用起来方便，而且公司也有版权，所以就没有考虑过其他的东东。不过唯一不足的地方就是需要安装（包括Win Zip和其Command Line Addon），而且需要让程序知道调用的WinZIP路径，配置起来不是很方便。
本次项目，考虑到程序的易配置性，决定采用另外别的方式进行压缩，找了找就找到了ICSharpCode的SharpZipLib组件，开源的，并且功能很强大：压缩、解压缩、加密等等一系列功能都有，而且调用起来也蛮方便的，于是决定采用该组件了。
同样，为了能够更好的为项目服务，也对该组件作了封装，调用更加简单。
using System;
using System.IO;
using System.Collections;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.GZip;
namespace BenQ.Modias.Utility
...{
/**////<summary>
///******************************************************************
///** Creator : Venus Feng
///** Create Date : 2006-9-19 16:21
///** Modifier :
///** Modify Date :
///** Description : Use ICSharpZipLib to ZIP File
///**
///**
///** Version No : 1.0.0
///**
///******************************************************************
///</summary>
public class ZIPPER : IDisposable
...{
private string m_FolderToZIP;
private ArrayList m_FileNamesToZIP;
private string m_FileNameZipped;
private ZipOutputStream m_ZipStream = null;
private Crc32 m_Crc;
Begin for Public Properties#region Begin for Public Properties
/**//// <summary>
/// Folder Name to ZIP
/// Like "C:Test"
/// </summary>
public string FolderToZIP
...{
get ...{ return m_FolderToZIP; }
set ...{ m_FolderToZIP = value; }
}
/**//// <summary>
/// File Name to ZIP
/// Like "C:TestTest.txt"
/// </summary>
public ArrayList FileNamesToZIP
...{
get ...{ return m_FileNamesToZIP; }
set ...{ m_FileNamesToZIP = value; }
}
/**//// <summary>
/// Zipped File Name
/// Like "C:TestMyZipFile.ZIP"
/// </summary>
public string FileNameZipped
...{
get ...{ return m_FileNameZipped; }
set ...{ m_FileNameZipped = value; }
}
#endregion
/**//// <summary>
/// The construct
/// </summary>
public ZIPPER()
...{
this.m_FolderToZIP = "";
this.m_FileNamesToZIP = new ArrayList();
this.m_FileNameZipped = "";
}
ZipFolder#region ZipFolder
/**//// <summary>
/// Zip one folder : single level
/// Before doing this event, you must set the Folder and the ZIP file name you want
/// </summary>
public void ZipFolder()
...{
if (this.m_FolderToZIP.Trim().Length == 0)
...{
throw new Exception("You must setup the folder name you want to zip!");
}
if(Directory.Exists(this.m_FolderToZIP) == false)
...{
throw new Exception("The folder you input does not exist! Please check it!");
}
if (this.m_FileNameZipped.Trim().Length == 0)
...{
throw new Exception("You must setup the zipped file name!");
}
string[] fileNames = Directory.GetFiles(this.m_FolderToZIP.Trim());
if (fileNames.Length == 0)
...{
throw new Exception("Can not find any file in this folder(" + this.m_FolderToZIP + ")!");
}
// Create the Zip File
this.CreateZipFile(this.m_FileNameZipped);
// Zip all files
foreach(string file in fileNames)
...{
this.ZipSingleFile(file);
}
// Close the Zip File
this.CloseZipFile();
}
#endregion
ZipFiles#region ZipFiles
/**//// <summary>
/// Zip files
/// Before doing this event, you must set the Files name and the ZIP file name you want
/// </summary>
public void ZipFiles()
...{
if (this.m_FileNamesToZIP.Count == 0)
...{
throw new Exception("You must setup the files name you want to zip!");
}
foreach(object file in this.m_FileNamesToZIP)
...{
if(File.Exists(((string)file).Trim()) == false)
...{
throw new Exception("The file(" + (string)file + ") you input does not exist! Please check it!");
}
}
if (this.m_FileNameZipped.Trim().Length == 0)
...{
throw new Exception("You must input the zipped file name!");
}
// Create the Zip File
this.CreateZipFile(this.m_FileNameZipped);
// Zip this File
foreach(object file in this.m_FileNamesToZIP)
...{
this.ZipSingleFile((string)file);
}
// Close the Zip File
this.CloseZipFile();
}
#endregion
CreateZipFile#region CreateZipFile
/**//// <summary>
/// Create Zip File by FileNameZipped
/// </summary>
/// <param name="fileNameZipped">zipped file name like "C:TestMyZipFile.ZIP"</param>
private void CreateZipFile(string fileNameZipped)
...{
this.m_Crc = new Crc32();
this.m_ZipStream = new ZipOutputStream(File.Create(fileNameZipped));
this.m_ZipStream.SetLevel(6); // 0 - store only to 9 - means best compression
}
#endregion
CloseZipFile#region CloseZipFile
/**//// <summary>
/// Close the Zip file
/// </summary>
private void CloseZipFile()
...{
this.m_ZipStream.Finish();
this.m_ZipStream.Close();
this.m_ZipStream = null;
}
#endregion
ZipSingleFile#region ZipSingleFile
/**//// <summary>
/// Zip single file
/// </summary>
/// <param name="fileName">file name like "C:TestTest.txt"</param>
private void ZipSingleFile(string fileNameToZip)
...{
// Open and read this file
FileStream fso = File.OpenRead(fileNameToZip);
// Read this file to Buffer
byte[] buffer = new byte[fso.Length];
fso.Read(buffer,0,buffer.Length);
// Create a new ZipEntry
ZipEntry zipEntry = new ZipEntry(fileNameToZip.Split('\')[fileNameToZip.Split('\').Length - 1]);
zipEntry.DateTime = DateTime.Now;
// set Size and the crc, because the information
// about the size and crc should be stored in the header
// if it is not set it is automatically written in the footer.
// (in this case size == crc == -1 in the header)
// Some ZIP programs have problems with zip files that don't store
// the size and crc in the header.
zipEntry.Size = fso.Length;
fso.Close();
fso = null;
// Using CRC to format the buffer
this.m_Crc.Reset();
this.m_Crc.Update(buffer);
zipEntry.Crc = this.m_Crc.Value;
// Add this ZipEntry to the ZipStream
this.m_ZipStream.PutNextEntry(zipEntry);
this.m_ZipStream.Write(buffer,0,buffer.Length);
}
#endregion
IDisposable member#region IDisposable member
/**//// <summary>
/// Release all objects
/// </summary>
public void Dispose()
...{
if(this.m_ZipStream != null)
...{
this.m_ZipStream.Close();
this.m_ZipStream = null;
}
}
#endregion
}
}
