ASP.NET 压缩和解压缩文件
using System;
using System.IO;
using System.Windows.Forms;
using System.Collections;
using System.Diagnostics;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip;
namespace zip
{
/// <summary>
/// 功能：压缩文件
/// creator chaodongwang 2009-11-11
/// </summary>
public class ZipClass
{
/// <summary>
/// 压缩单个文件
/// </summary>
/// <param name="FileToZip">被压缩的文件名称(包含文件路径)</param>
/// <param name="ZipedFile">压缩后的文件名称(包含文件路径)</param>
/// <param name="CompressionLevel">压缩率0（无压缩）-9（压缩率最高）</param>
/// <param name="BlockSize">缓存大小</param>
public void ZipFile(string FileToZip, string ZipedFile, int CompressionLevel)
{
//如果文件没有找到，则提示
if (!File.Exists(FileToZip))
{
//throw new System.IO.FileNotFoundException("文件：" + FileToZip + "没有找到！");
MessageBox.Show("文件不存在");
}
/***创建一个同名的压缩文件在同一目录**/
if (ZipedFile == string.Empty)
{
ZipedFile = Path.GetDirectoryName(FileToZip)+Path.DirectorySeparatorChar+Path.GetFileNameWithoutExtension(FileToZip) + ".zip";
}
if (Path.GetExtension(ZipedFile) != ".zip")
{
ZipedFile = ZipedFile + ".zip";
}
//如果指定位置目录不存在，创建该目录
string zipedDir = ZipedFile.Substring(0,ZipedFile.LastIndexOf("//"));
if (!Directory.Exists(zipedDir))
{
Directory.CreateDirectory(zipedDir);
}
//被压缩文件名称
string filename = Path.GetFileName(FileToZip);
FileStream StreamToZip = new FileStream(FileToZip, FileMode.Open, FileAccess.Read);
FileStream ZipFile = File.Create(ZipedFile);
ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
ZipEntry ZipEntry = new ZipEntry(filename);
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(CompressionLevel);
byte[] buffer = new byte[2048];
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;
MessageBox.Show(ex.Message);
}
finally
{
ZipStream.Finish();
ZipStream.Close();
StreamToZip.Close();
}
}
/// <summary>
/// 压缩文件夹的方法
/// </summary>
public void ZipDir(string DirToZip, string ZipedFile, int CompressionLevel)
{
if (DirToZip.LastIndexOf("//") == DirToZip.Length - 1)
{
DirToZip = DirToZip.Substring(0,DirToZip.Length-1);
}
//压缩文件为空时默认与压缩文件夹同一级目录
if (ZipedFile == string.Empty)
{
/**获得目录的名称**/
ZipedFile = DirToZip.Substring(DirToZip.LastIndexOf("//") + 1);
ZipedFile = DirToZip.Substring(0, DirToZip.LastIndexOf("//")) + Path.DirectorySeparatorChar + ZipedFile + ".zip";
}
if (Path.GetExtension(ZipedFile) != ".zip")
{
ZipedFile = ZipedFile + ".zip";
}
using (ZipOutputStream zipoutputstream = new ZipOutputStream(File.Create(ZipedFile)))
{
/**设置文件压缩级别**/
zipoutputstream.SetLevel(CompressionLevel);
Crc32 crc = new Crc32();
Hashtable fileList = getAllFies(DirToZip);
foreach (DictionaryEntry item in fileList)
{
FileStream fs = File.OpenRead(item.Key.ToString());
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
ZipEntry entry = new ZipEntry(item.Key.ToString().Substring(DirToZip.Length + 1));
entry.DateTime = (DateTime)item.Value;
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
zipoutputstream.PutNextEntry(entry);
zipoutputstream.Write(buffer, 0, buffer.Length);
}
}
}
/// <summary>
/// 获取所有文件
/// </summary>
/// <returns></returns>
private Hashtable getAllFies(string dir)
{
Hashtable FilesList = new Hashtable();
DirectoryInfo fileDire = new DirectoryInfo(dir);
if (!fileDire.Exists)
{
throw new System.IO.FileNotFoundException("目录:" + fileDire.FullName + "没有找到!");
}
this.getAllDirFiles(fileDire, FilesList);
this.getAllDirsFiles(fileDire.GetDirectories(), FilesList);
return FilesList;
}
/// <summary>
/// 获取一个文件夹下的所有文件夹里的文件
/// </summary>
/// <param name="dirs"></param>
/// <param name="filesList"></param>
private void getAllDirsFiles(DirectoryInfo[] dirs, Hashtable filesList)
{
foreach (DirectoryInfo dir in dirs)
{
foreach (FileInfo file in dir.GetFiles("*.*"))
{
filesList.Add(file.FullName, file.LastWriteTime);
}
this.getAllDirsFiles(dir.GetDirectories(), filesList);
}
}
/// <summary>
/// 获取一个文件夹下的文件
/// </summary>
/// <param name="strDirName">目录名称</param>
/// <param name="filesList">文件列表HastTable</param>
private void getAllDirFiles(DirectoryInfo dir, Hashtable filesList)
{
foreach (FileInfo file in dir.GetFiles("*.*"))
{
filesList.Add(file.FullName, file.LastWriteTime);
}
}
}
}
/// <summary>
/// 解压文件
/// </summary>
using System;
using System.Text;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Windows.Forms;
using System.Diagnostics;
//using System.Runtime.Serialization.Formatters.Binary;
using System.Data;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Zip.Compression;
using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
namespace zip
{
/// <summary>
/// 功能：解压文件
/// creator chaodongwang 2009-11-11
/// </summary>
public class UnZipClass
{
/// <summary>
/// 功能：解压zip格式的文件。
/// </summary>
/// <param name="zipFilePath">压缩文件路径</param>
/// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param>
/// <param name="err">出错信息</param>
/// <returns>解压是否成功</returns>
public void UnZip(string zipFilePath, string unZipDir)
{
if (zipFilePath == string.Empty)
{
//throw new Exception("压缩文件不能为空！");
MessageBox.Show("压缩文件不能为空!");
}
if (!File.Exists(zipFilePath))
{
//throw new System.IO.FileNotFoundException("压缩文件不存在！");
MessageBox.Show("压缩文件不存在!");
}
if (unZipDir == string.Empty)
{
//解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹
//unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
//不同名，直接解压
unZipDir = Path.GetDirectoryName(zipFilePath);
}
if (!unZipDir.EndsWith("//"))
{
unZipDir += "//";
}
if (!Directory.Exists(unZipDir))
{
Directory.CreateDirectory(unZipDir);
}
using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))
{
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
string directoryName = Path.GetDirectoryName(theEntry.Name);
string fileName = Path.GetFileName(theEntry.Name);
if (directoryName.Length > 0)
{
Directory.CreateDirectory(unZipDir + directoryName);
}
if (!directoryName.EndsWith("//"))
{
directoryName += "//";
}
if (fileName != String.Empty)
{
using (FileStream streamWriter = File.Create(unZipDir + 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;
}
}
}
}
}
}
}
}
}