我们 开发时经常会遇到需要压缩文件的需求，利用C#的开源组件ICSharpCode.SharpZipLib，
就可以很容易的实现压缩和解压缩功能.
压缩文件：
/// <summary>
/// 压缩指定文件生成ZIP文件
/// </summary>
/// <param name="topDirName">顶层文件夹名称</param>
/// <param name="fileNamesToZip">待压缩文件列表</param>
/// <param name="ZipedFileName">ZIP文件</param>
/// <param name="CompressionLevel">压缩比</param>
/// <param name="password">密码</param>
/// <param name="comment">压缩文件注释文字</param>
public static void ZipFile
(
string topDirName,
string fileNameToZip,
string ZipedFileName,
int CompressionLevel,
string password,
string comment
)
{
var ls = new List<string> { fileNameToZip };
ZipFile(topDirName, ls.ToArray(), ZipedFileName, CompressionLevel, password, comment);
}
/// <summary>
/// 压缩指定文件生成ZIP文件
/// </summary>
/// <param name="topDirName">顶层文件夹名称</param>
/// <param name="fileNamesToZip">待压缩文件列表</param>
/// <param name="ZipedFileName">ZIP文件</param>
/// <param name="CompressionLevel">压缩比</param>
/// <param name="password">密码</param>
/// <param name="comment">压缩文件注释文字</param>
public static void ZipFile
(
string topDirName,
string[] fileNamesToZip,
string ZipedFileName,
int CompressionLevel,
string password,
string comment
)
{
using (var s = new ZipOutputStream(File.Open(ZipedFileName, FileMode.Create)))
{
if (password != null && password.Length > 0)
s.Password = password;
if (comment != null && comment.Length > 0)
s.SetComment(comment);
s.SetLevel(CompressionLevel); // 0 - means store only to 9 - means best compression
foreach (string file in fileNamesToZip)
{
using (FileStream fs = File.OpenRead(topDirName + file))
{ //打开待压缩文件
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length); //读取文件流
ZipEntry entry = new ZipEntry(file); //新建实例
entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
}
s.Finish();
}
}
解压文件：
/// <summary>
/// 解压缩ZIP文件到指定文件夹
/// </summary>
/// <param name="zipfileName">ZIP文件</param>
/// <param name="UnZipDir">解压文件夹</param>
/// <param name="password">压缩文件密码</param>
public static void UnZipFile(string zipfileName, string UnZipDir, string password)
{
using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipfileName)))
{
if (!string.IsNullOrWhiteSpace(password))
s.Password = password;
try
{
ZipEntry theEntry;
while ((theEntry = s.GetNextEntry()) != null)
{
string directoryName = Path.GetDirectoryName(UnZipDir);
string pathname = Path.GetDirectoryName(theEntry.Name);
string fileName = Path.GetFileName(theEntry.Name);
//生成解压目录
pathname = pathname.Replace(":", "$");//处理压缩时带有盘符的问题
directoryName = directoryName + "\" + pathname;
Directory.CreateDirectory(directoryName);
if (fileName != String.Empty)
{
//解压文件到指定的目录
using (var streamWriter = File.Create(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.Flush();
}
}
}
}
catch (Exception eu)
{
throw eu;
}
}
}