windows mobile 上文件压缩与解压缩(使用ICSharpCode.SharpZipLib.Zip)

/// <summary>
/// Zip压缩与解压缩
/// </summary>
public class ZipHelper
{
/// <summary>
/// 压缩单个文件
/// </summary>
/// <param name="fileToZip">要压缩的文件</param>
/// <param name="zipedFile">压缩后的文件</param>
/// <param name="compressionLevel">压缩等级</param>
/// <param name="blockSize">每次写入大小</param>
public static void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize)
{
//如果文件没有找到，则报错
if (!System.IO.File.Exists(fileToZip))
{
throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");
}

using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
{
using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
{
using (System.IO.FileStream StreamToZip = new System.IO.FileStream(fileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read))
{
string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);

ZipEntry ZipEntry = new ZipEntry(fileName);

ZipStream.PutNextEntry(ZipEntry);

ZipStream.SetLevel(compressionLevel);

byte[] buffer = new byte[blockSize];

int sizeRead = 0;

try
{
do
{
sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
ZipStream.Write(buffer, 0, sizeRead);
}
while (sizeRead > 0);
}
catch (System.Exception ex)
{
throw ex;
}

StreamToZip.Close();
}

ZipStream.Finish();
ZipStream.Close();
}

ZipFile.Close();
}
}

/// <summary>
/// 压缩单个文件
/// </summary>
/// <param name="fileToZip">要进行压缩的文件名</param>
/// <param name="zipedFile">压缩后生成的压缩文件名</param>
public static void ZipFile(string fileToZip, string zipedFile)
{
//如果文件没有找到，则报错
if (!File.Exists(fileToZip))
{
throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");
}

using (FileStream fs = File.OpenRead(fileToZip))
{
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
fs.Close();

using (FileStream ZipFile = File.Create(zipedFile))
{
using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
{
string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);
ZipEntry ZipEntry = new ZipEntry(fileName);
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(5);

ZipStream.Write(buffer, 0, buffer.Length);
ZipStream.Finish();
ZipStream.Close();
}
}
}
}

/// <summary>
/// 压缩多层目录
/// </summary>
/// <param name="strDirectory">The directory.</param>
/// <param name="zipedFile">The ziped file.</param>
public static void ZipFileDirectory(string strDirectory, string zipedFile)
{
using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
{
using (ZipOutputStream s = new ZipOutputStream(ZipFile))
{
ZipSetp(strDirectory, s, "");
}
}
}

/// <summary>
/// 递归遍历目录
/// </summary>
/// <param name="strDirectory">The directory.</param>
/// <param name="s">The ZipOutputStream Object.</param>
/// <param name="parentPath">The parent path.</param>
private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath)
{
if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar)
{
strDirectory += Path.DirectorySeparatorChar;
}
Crc32 crc = new Crc32();

string[] filenames = Directory.GetFileSystemEntries(strDirectory);

foreach (string file in filenames)// 遍历所有的文件和目录
{

if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
{
string pPath = parentPath;
pPath += file.Substring(file.LastIndexOf("\\") + 1);
pPath += "\\";
ZipSetp(file, s, pPath);
}

else // 否则直接压缩文件
{
//打开压缩文件
using (FileStream fs = File.OpenRead(file))
{

byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);

string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + 1);
ZipEntry entry = new ZipEntry(fileName);

entry.DateTime = DateTime.Now;
entry.Size = fs.Length;

fs.Close();

crc.Reset();
crc.Update(buffer);

entry.Crc = crc.Value;
s.PutNextEntry(entry);

s.Write(buffer, 0, buffer.Length);
}
}
}
}

/// <summary>
/// 解压缩一个 zip 文件。
/// </summary>
/// <param name="zipedFile">The ziped file.</param>
/// <param name="strDirectory">The STR directory.</param>
/// <param name="password">zip 文件的密码。</param>
/// <param name="overWrite">是否覆盖已存在的文件。</param>
public void UnZip(string zipedFile, string strDirectory, string password, bool overWrite)
{

if (strDirectory == "")
strDirectory = Directory.GetCurrentDirectory();
if (!strDirectory.EndsWith("\\"))
strDirectory = strDirectory + "\\";

using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipedFile)))
{
s.Password = password;
ZipEntry theEntry;

while ((theEntry = s.GetNextEntry()) != null)
{
string directoryName = "";
string pathToZip = "";
pathToZip = theEntry.Name;

if (pathToZip != "")
directoryName = Path.GetDirectoryName(pathToZip) + "\\";

string fileName = Path.GetFileName(pathToZip);

Directory.CreateDirectory(strDirectory + directoryName);

if (fileName != "")
{
if ((File.Exists(strDirectory + directoryName + fileName) && overWrite) || (!File.Exists(strDirectory + directoryName + fileName)))
{
using (FileStream streamWriter = File.Create(strDirectory + directoryName + fileName))
{
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;
}
streamWriter.Close();
}
}
}
}

s.Close();
}
}

}