C#実装Zip圧縮解凍インスタンス
ここでは、dllリファレンスICSharpCodeを追加する圧縮ヘルプクラスを1つだけ列挙する.SharpZipLib.dll【ダウンロードアドレス】.なお、このクラスの圧縮形式はZIPであるため、ファイルの接尾辞は書く.zip.また、このクラスでrar形式の圧縮ファイルを解凍するとエラーが発生し、ネット上で言う「Wrong Local header signature:0 x 21726152」異常です.ZIP圧縮形式の圧縮ファイルを解凍すればエラーは発生しません.次にHelperクラスのコードを示します.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;
namespace CLeopardZip
{
///
/// ZIP
///
public class ZipHelper
{
#region
///
///
///
///
///
///
///
private static bool ZipDirectory(string folderToZip, ZipOutputStream zipStream, string parentFolderName)
{
bool result = true;
string[] folders, files;
ZipEntry ent = null;
FileStream fs = null;
Crc32 crc = new Crc32();
try
{
ent = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/"));
zipStream.PutNextEntry(ent);
zipStream.Flush();
files = Directory.GetFiles(folderToZip);
foreach (string file in files)
{
fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
ent = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/" + Path.GetFileName(file)));
ent.DateTime = DateTime.Now;
ent.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
ent.Crc = crc.Value;
zipStream.PutNextEntry(ent);
zipStream.Write(buffer, 0, buffer.Length);
}
}
catch
{
result = false;
}
finally
{
if (fs != null)
{
fs.Close();
fs.Dispose();
}
if (ent != null)
{
ent = null;
}
GC.Collect();
GC.Collect(1);
}
folders = Directory.GetDirectories(folderToZip);
foreach (string folder in folders)
if (!ZipDirectory(folder, zipStream, folderToZip))
return false;
return result;
}
///
///
///
///
///
///
///
public static bool ZipDirectory(string folderToZip, string zipedFile, string password)
{
bool result = false;
if (!Directory.Exists(folderToZip))
return result;
ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipedFile));
zipStream.SetLevel(6);
if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
result = ZipDirectory(folderToZip, zipStream, "");
zipStream.Finish();
zipStream.Close();
return result;
}
///
///
///
///
///
///
public static bool ZipDirectory(string folderToZip, string zipedFile)
{
bool result = ZipDirectory(folderToZip, zipedFile, null);
return result;
}
///
///
///
///
///
///
///
public static bool ZipFile(string fileToZip, string zipedFile, string password)
{
bool result = true;
ZipOutputStream zipStream = null;
FileStream fs = null;
ZipEntry ent = null;
if (!File.Exists(fileToZip))
return false;
try
{
fs = File.OpenRead(fileToZip);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
fs.Close();
fs = File.Create(zipedFile);
zipStream = new ZipOutputStream(fs);
if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
ent = new ZipEntry(Path.GetFileName(fileToZip));
zipStream.PutNextEntry(ent);
zipStream.SetLevel(6);
zipStream.Write(buffer, 0, buffer.Length);
}
catch
{
result = false;
}
finally
{
if (zipStream != null)
{
zipStream.Finish();
zipStream.Close();
}
if (ent != null)
{
ent = null;
}
if (fs != null)
{
fs.Close();
fs.Dispose();
}
}
GC.Collect();
GC.Collect(1);
return result;
}
///
///
///
///
///
///
public static bool ZipFile(string fileToZip, string zipedFile)
{
bool result = ZipFile(fileToZip, zipedFile, null);
return result;
}
///
///
///
///
///
///
///
public static bool Zip(string fileToZip, string zipedFile, string password)
{
bool result = false;
if (Directory.Exists(fileToZip))
result = ZipDirectory(fileToZip, zipedFile, password);
else if (File.Exists(fileToZip))
result = ZipFile(fileToZip, zipedFile, password);
return result;
}
///
///
///
///
///
///
public static bool Zip(string fileToZip, string zipedFile)
{
bool result = Zip(fileToZip, zipedFile, null);
return result;
}
#endregion
#region
///
/// ( )
///
///
///
///
///
public static bool UnZip(string fileToUnZip, string zipedFolder, string password)
{
bool result = true;
FileStream fs = null;
ZipInputStream zipStream = null;
ZipEntry ent = null;
string fileName;
if (!File.Exists(fileToUnZip))
return false;
if (!Directory.Exists(zipedFolder))
Directory.CreateDirectory(zipedFolder);
try
{
zipStream = new ZipInputStream(File.OpenRead(fileToUnZip));
if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
while ((ent = zipStream.GetNextEntry()) != null)
{
if (!string.IsNullOrEmpty(ent.Name))
{
fileName = Path.Combine(zipedFolder, ent.Name);
fileName = fileName.Replace('/', '\\');//change by Mr.HopeGi
if (fileName.EndsWith("\\"))
{
Directory.CreateDirectory(fileName);
continue;
}
fs = File.Create(fileName);
int size = 2048;
byte[] data = new byte[size];
while (true)
{
size = fs.Read(data, 0, data.Length);
if (size > 0)
fs.Write(data, 0, data.Length);
else
break;
}
}
}
}
catch
{
result = false;
}
finally
{
if (fs != null)
{
fs.Close();
fs.Dispose();
}
if (zipStream != null)
{
zipStream.Close();
zipStream.Dispose();
}
if (ent != null)
{
ent = null;
}
GC.Collect();
GC.Collect(1);
}
return result;
}
///
/// ( )
///
///
///
///
public static bool UnZip(string fileToUnZip, string zipedFolder)
{
bool result = UnZip(fileToUnZip, zipedFolder, null);
return result;
}
#endregion
}
}