using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;
namespace AttachmentsWindow
{
public class Compression
{
//string []FileProperties=new string[2];
//FileProperties[0]="C:\\unzipped\\";//待压缩文件目录
//FileProperties[1]="C:\\zip\\a.zip"; //压缩后的目标文件
//ZipClass Zc=new ZipClass();
//Zc.ZipFileMain(FileProperties);
//string []FileProperties=new string[2];
//FileProperties[0]="C:\\zip\\test.zip";//待解压的文件
//FileProperties[1]="C:\\unzipped\\";//解压后放置的目标目录
//UnZipClass UnZc=new UnZipClass();
//UnZc.UnZip(FileProperties);
/// <summary>
/// 压缩文件
/// </summary>
/// <param name="FileToZip"></param>
/// <param name="ZipedFile"></param>
/// <param name="CompressionLevel"></param>
/// <param name="BlockSize"></param>
public 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("The specified file " + FileToZip + " could not be found. Zipping aborderd");
}
System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read);
System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile);
ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
ZipEntry ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(CompressionLevel);
if (BlockSize == 0)
{
BlockSize = (int)StreamToZip.Length;
}
byte[] buffer = new byte[BlockSize];
System.Int32 size = StreamToZip.Read(buffer, 0, buffer.Length);
ZipStream.Write(buffer, 0, size);
try
{
while (size < StreamToZip.Length)
{
int sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
ZipStream.Write(buffer, 0, sizeRead);
size += sizeRead;
}
}
catch (System.Exception ex)
{
throw ex;
}
ZipStream.Finish();
ZipStream.Close();
StreamToZip.Close();
}
/// <summary>
/// 多文件压缩
/// </summary>
/// <param name="args"></param>
public void ZipFiles(string[] args)
{
string[] filenames = Directory.GetFiles(args[0]);
Crc32 crc = new Crc32();
ZipOutputStream s = new ZipOutputStream(File.Create(args[1]));
s.SetLevel(6); // 0 - store only to 9 - means best compression
foreach (string file in filenames)
{
//打开压缩文件
FileStream fs = File.OpenRead(file);
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
ZipEntry entry = new ZipEntry(Path.GetFileName(file));
entry.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.
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
s.Finish();
s.Close();
}
/// <summary>
/// 多文件解压缩
/// </summary>
/// <param name="args"></param>
public void UnZip(string[] args)
{
ZipInputStream s = new ZipInputStream(File.OpenRead(args[0]));
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
string directoryName = Path.GetDirectoryName(args[1]);
string fileName = Path.GetFileName(theEntry.Name);
//生成解压目录
Directory.CreateDirectory(directoryName);
if (fileName != String.Empty)
{
//解压文件到指定的目录
FileStream streamWriter = File.Create(args[1] + theEntry.Name);
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();
}
}
}
压缩 解压缩类文件