Esse código provê uma classe completa com exemplo para compactar e descompactar pastas e arquivos.
/*
* CPZipStripper 2.0
* Written by Decebal Mihailescu [https://www.codeproject.com/script/articles/list_articles.asp?userid=634640]
*/
using System;
using System.Collections.Generic;
using System.Text;
using java.util.zip;
using System.IO;
namespace CPZipStripper
{
static class ZipUtility
{
static private string m_zipFolder;
static private ZipOutputStream _zos = null;
static private int m_trimIndex = 0;
static private sbyte[] _buffer = new sbyte[2048];
//public delegate bool IsFileStrippableDelegate(string fname);
public static List GetZipFileNames(string zipFile)
{
ZipFile zf = null;
List list = new List();
try
{
zf = new ZipFile(zipFile);
java.util.Enumeration enu = zf.entries();
while (enu.hasMoreElements())
{
ZipEntry zen = enu.nextElement() as ZipEntry;
if (zen.isDirectory())
continue;//ignore directories
list.Add(zen.getName());
}
}
catch(Exception ex)
{
throw new ApplicationException("Please drag/drop only valid zip filesnthat are not password protected.",ex);
}
finally
{
if (zf != null)
zf.close();
}
return list;
}
public static void CreateZipFromFolder(string Folder, IsFileStrippableDelegate IsStrip)
{
try
{
string ParentDir = Directory.GetParent(Folder).FullName;
m_trimIndex = ParentDir.Length;
string root = Path.GetPathRoot(Folder);
if (ParentDir != root)
m_trimIndex++;
m_zipFolder = Folder;
string strNewFile = m_zipFolder + ".zip";
string fileName = Path.GetFileName(strNewFile);
strNewFile = Path.GetDirectoryName(strNewFile) + @"" + fileName;
//make room for the new zip
System.IO.File.Delete(strNewFile + ".old");
if (File.Exists(strNewFile))
System.IO.File.Move(strNewFile, strNewFile + ".old");
_zos = new ZipOutputStream(new java.io.FileOutputStream(strNewFile));
_CreateZipFromFolder(Folder, IsStrip);
}//try ends
catch (Exception ex)
{
throw new ApplicationException("unable to zip " + Folder + "folder", ex);
}
finally
{
if (_zos != null)
_zos.close();
_zos = null;
m_trimIndex = 0;
}
}
private static void _CreateZipFromFolder(string Folder, IsFileStrippableDelegate IsStrip)
{
System.IO.DirectoryInfo dirInfo =
new System.IO.DirectoryInfo(Folder);
System.IO.FileInfo[] files = dirInfo.GetFiles("*");//all files
foreach (FileInfo file in files)
{
if (IsStrip != null && IsStrip(file.FullName))
continue;//skip, don't zip it
java.io.FileInputStream instream = new java.io.FileInputStream(file.FullName);
int bytes = 0;
string strEntry = file.FullName.Substring(m_trimIndex);
_zos.putNextEntry(new ZipEntry(strEntry));
while ((bytes = instream.read(_buffer, 0, _buffer.Length)) > 0)
{
_zos.write(_buffer, 0, bytes);
}
_zos.closeEntry();
instream.close();
}
System.IO.DirectoryInfo[] folders = null;
folders = dirInfo.GetDirectories("*");
if (folders != null)
{
foreach (System.IO.DirectoryInfo folder in folders)
{
_CreateZipFromFolder(folder.FullName, IsStrip);
}
}
}
public static void StripZip(string zipFile, List trashFiles)
{
if (zipFile == null ||zipFile.Length == 0 || !File.Exists(zipFile))
return;
ZipOutputStream zos = null;
ZipInputStream zis = null;
//remove 'zip' extension
bool bsuccess = true;
string strNewFile = zipFile.Remove(zipFile.Length - 3, 3) + "tmp";
try
{
zos = new ZipOutputStream(new java.io.FileOutputStream(strNewFile));
zis = new ZipInputStream(new java.io.FileInputStream(zipFile));
ZipEntry ze = null;
while ((ze = zis.getNextEntry()) != null)
{
if (ze.isDirectory())
continue;//ignore directories
string fname = ze.getName();
bool bstrip = trashFiles.Contains(fname);
if (!bstrip)
{
//copy the entry from zis to zos
int bytes = 0;
try
{
//deal with password protected files
zos.putNextEntry(new ZipEntry(fname));
while ((bytes = zis.read(_buffer, 0, _buffer.Length)) > 0)
{
zos.write(_buffer, 0, bytes);
}
}
catch (Exception)
{
bsuccess = false;
throw;
}
finally
{
zis.closeEntry();
zos.closeEntry();
}
}
}
}
catch (Exception ex)
{
bsuccess = false;
throw new ApplicationException("unable to zip/unzip: " + zipFile, ex);
}
finally
{
if (zis != null)
zis.close();
if (zos != null)
zos.close();
if (bsuccess)
{
System.IO.File.Delete(zipFile + ".old");
System.IO.File.Move(zipFile, zipFile + ".old");
System.IO.File.Move(strNewFile, zipFile);
}
else
{
System.IO.File.Delete(strNewFile);
}
}
}
public static void UnZip(string file, string Folder, IsFileStrippableDelegate IsStrip)
{
if (file == null || file.Length == 0 || !File.Exists(file))
return;
ZipInputStream zis = null;
try
{
zis = new ZipInputStream(new java.io.FileInputStream(file));
ZipEntry ze = null;
while ((ze = zis.getNextEntry()) != null)
{
if (ze.isDirectory())
continue;//ignore directories
string fname = ze.getName();
bool bstrip = IsStrip != null && IsStrip(fname);
if (!bstrip)
{
//unzip entry
int bytes = 0;
FileStream filestream = null;
BinaryWriter w = null;
try
{
string filePath = Folder + @"" + fname;
if(!Directory.Exists(Path.GetDirectoryName(filePath)))
Directory.CreateDirectory(Path.GetDirectoryName(filePath));
filestream = new FileStream(filePath, FileMode.Create);
w = new BinaryWriter(filestream);
while ((bytes = zis.read(_buffer, 0, _buffer.Length)) > 0)
{
for (int i = 0; i < bytes; i++)
{
unchecked
{
w.Write((byte)_buffer[i]);
}
}
}
}
catch (Exception)
{
throw;
}
finally
{
zis.closeEntry();
w.Close();
filestream.Close();
}
}
}
}
catch (Exception ex)
{
throw new ApplicationException("unable to unzip: " + file +"nIt might be password protected.", ex);
}
finally
{
if (zis != null)
zis.close();
}
}
}
}
