C# 压缩、解压缩文件
用了 Log4net 记录日志，如果没有 Log4net 的，将 Log4net 注释即可运行
using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Collections;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.Checksums;
using ICSharpCode.SharpZipLib.Zip.Compression;
using log4net;
namespace FiSMDataClient.Service
{
public class ZipLib
{
private static readonly ILog LOG = LogManager.GetLogger(typeof(FileLib));
public ArrayList fileList = new ArrayList();
string changname=null;
#region 压缩文件
/// <summary>
/// 压缩多文件（调用之前先为fileList 赋值）
/// </summary>
/// <param name="outZipPath">输出Zip文件的全路径</param>
public void Compress(string outZipPath)
{
try
{
Crc32 crc = new Crc32();
ZipOutputStream zipStream = new ZipOutputStream(File.Create(outZipPath));
zipStream.SetLevel(9); // 0 - store only to 9 - means best compression
foreach (string file in FileList)
{
FileStream fStream = File.OpenRead(file);
byte[] buffer = new byte[fStream.Length];
fStream.Read(buffer, 0, buffer.Length);
string filename = file.Substring(file.LastIndexOf("//") + 1, file.Length - file.LastIndexOf("//") - 1);
ZipEntry entry = new ZipEntry(filename);
entry.DateTime = DateTime.Now;
entry.Size = fStream.Length;
fStream.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
zipStream.PutNextEntry(entry);
zipStream.Write(buffer, 0, buffer.Length);
}
zipStream.Finish();
zipStream.Close();
}
catch
{
}
}
#endregion
#region 解压缩文件
/// <summary>
/// 解压缩文件
/// </summary>
/// <param name="srcPath">待解压文件全路径</param>
/// <param name="outPutPath">解压后的文件路径</param>
/// <param name="outPutOldPath">解压后的文件路径</param>
public bool UnCompress(string srcPath, string outPutPath, string outPutOldPath)
{
try
{
ZipInputStream s = new ZipInputStream(File.OpenRead(srcPath));
string realPath = Path.GetDirectoryName(srcPath);
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
outPutPath = Path.GetDirectoryName(outPutOldPath + "//" + theEntry.Name);
string fileName = Path.GetFileName(theEntry.Name);
Directory.CreateDirectory(outPutPath);
if (fileName != String.Empty)
{
FileStream streamWriter = File.Create(outPutOldPath + "//" + 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();
if (fileName.ToLower().EndsWith(".zip"))
{
UnCompress(realPath + @"/" + fileName, outPutPath, outPutOldPath);
}
}
}
}
catch(Exception ex)
{
LOG.Error("ZipLib类UnCompress（）异常："+ex.Message);
return false;
}
return true;
}
public bool UnCompressExcel(string srcPath, string outPutPath, string outPutOldPath)
{
try
{
ZipInputStream s = new ZipInputStream(File.OpenRead(srcPath));
string realPath = Path.GetDirectoryName(srcPath);
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
outPutPath = Path.GetDirectoryName(outPutOldPath + "//" + theEntry.Name);
string fileName = Path.GetFileName(theEntry.Name);
//Directory.CreateDirectory(outPutPath);
if (fileName != String.Empty)
{
string relfilename = System.Web.HttpUtility.UrlDecode(fileName);
string rootpath = outPutOldPath;
if (!Directory.Exists(rootpath))
{
Directory.CreateDirectory(rootpath);
}
if (relfilename.Contains("@"))
{
string[] splitfilenames = relfilename.Split(new string[] { "@" }, new StringSplitOptions());
fileName = splitfilenames[splitfilenames.Length - 1];
for (int number = 0; number < splitfilenames.Length - 1; number++)
{
rootpath += "//" + splitfilenames[number]+"######";
if (!Directory.Exists(rootpath))
{
Directory.CreateDirectory(rootpath);
}
}
}
CheckAndChangFilename(fileName, rootpath);
FileStream streamWriter = File.Create(rootpath + "//" + 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();
if (fileName.ToLower().EndsWith(".zip"))
{
UnCompress(realPath + @"/" + fileName, outPutPath, outPutOldPath);
}
}
}
}
catch (Exception ex)
{
LOG.Error("ZipLib类UnCompress（）异常：" + ex.Message);
return false;
}
return true;
}
private void CheckAndChangFilename(string fileName, string rootpath) //判断如果有重名则更换名字
{
if (fileName.Contains(".xls"))
{
string[] splitnames = fileName.Split(new string[] { ".xls" }, new StringSplitOptions());
int flag = CheckTheSameFile(rootpath, splitnames[0]);
if (flag > 0)
{
changname = splitnames[0] + flag.ToString();
System.IO.File.Copy(rootpath + "//" + fileName, rootpath + "//" + changname + ".xls", true);
File.Delete(rootpath + "//" + fileName);
}
}
}
#endregion
public int CheckTheSameFile(string rootpath,string filename)
{
int flag = 0;
string[] files = Directory.GetFiles(rootpath);
foreach(string file in files)
{
string filena = Path.GetFileName(file);
if (filena.Contains(".xls"))
{
string[] splitfilena = filena.Split(new string[] { ".xls" }, new StringSplitOptions());
if (splitfilena[0].Contains(filename))
{
flag++;
}
}
}
return flag;
}
#region 属性
/// <summary>
/// 待压缩文件的全路径名
/// </summary>
public ArrayList FileList
{
get { return fileList; }
set { fileList = value; }
}
#endregion
}
}
原文：http://blog.csdn.net/lijiangchxp2005/archive/2008/04/22/2315084.aspx