C#实现文件夹压缩到zip以及解压

需要用到SharpLibZip。代码如下：

Zip.cs

    public class Zip
{
/// <summary>
        /// 压缩文件夹
/// </summary>
        /// <param name="dirPath">压缩文件夹的路径</param>
        /// <param name="fileName">生成的zip文件路径</param>
        /// <param name="level">压缩级别 0 - 9 0是存储级别 9是最大压缩</param>
        /// <param name="bufferSize">读取文件的缓冲区大小</param>
        public void CompressDirectory(string dirPath,string fileName,int level,int bufferSize)
{
byte[] buffer = new byte[bufferSize];
using (ZipOutputStream s = new ZipOutputStream(File.Create(fileName)))
{
s.SetLevel(level);
CompressDirectory(dirPath, dirPath, s, buffer);
s.Finish();
s.Close();
}
}

/// <summary>
        /// 压缩文件夹
/// </summary>
        /// <param name="root">压缩文件夹路径</param>
        /// <param name="path">压缩文件夹内当前要压缩的文件夹路径</param>
        /// <param name="s"></param>
        /// <param name="buffer">读取文件的缓冲区大小</param>
        private void CompressDirectory(string root, string path, ZipOutputStream s, byte[] buffer)
{
root = root.TrimEnd('//') + "//";
string[] fileNames = Directory.GetFiles(path);
string[] dirNames = Directory.GetDirectories(path);
string relativePath = path.Replace(root, "");
if (relativePath != "")
{
relativePath = relativePath.Replace("//", "/") + "/";
}
int sourceBytes;
foreach (string file in fileNames)
{                ZipEntry entry

= new ZipEntry(relativePath + Path.GetFileName(file));
entry.DateTime = DateTime.Now;
s.PutNextEntry(entry);
using (FileStream fs = File.OpenRead(file))
{
do
{
sourceBytes = fs.Read(buffer, 0, buffer.Length);
s.Write(buffer, 0, sourceBytes);
} while (sourceBytes > 0);
}
}

foreach (string dirName in dirNames)
{
string relativeDirPath = dirName.Replace(root, "");
ZipEntry entry = new ZipEntry(relativeDirPath.Replace("//", "/") + "/");
s.PutNextEntry(entry);
CompressDirectory(root, dirName, s, buffer);
}
}

/// <summary>
        /// 解压缩zip文件
/// </summary>
        /// <param name="zipFilePath">解压的zip文件路径</param>
        /// <param name="extractPath">解压到的文件夹路径</param>
        /// <param name="bufferSize">读取文件的缓冲区大小</param>
        public void Extract(string zipFilePath, string extractPath, int bufferSize)
{
extractPath = extractPath.TrimEnd('//') + "//";
byte[] data = new byte[bufferSize];
int size;
using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))
{
ZipEntry entry;
while ((entry = s.GetNextEntry()) != null)
{
string directoryName = Path.GetDirectoryName(entry.Name);
string fileName = Path.GetFileName(entry.Name);

//先创建目录
if (directoryName.Length > 0)
{
Directory.CreateDirectory(extractPath + directoryName);
}

if (fileName != String.Empty)
{
using (FileStream streamWriter = File.Create(extractPath + entry.Name.Replace("/", "//")))
{
while (true)
{
size = s.Read(data, 0, data.Length);
if (size > 0)
{
streamWriter.Write(data, 0, size);
}
else
{
break;
}
}
}
}
}
}
} }

网上找了很久包括老外的site也找了没找到现成的自己写了一个

使用方法：

Zip z = new Zip();z.Extract(

"c://cc.zip","c://haha", 4096); z.Extract("cc.zip","c://haha", 4096); z.Extract("c://cc.zip","haha", 4096);

//上面的解压缩没啥大问题

z.CompressDirectory("E://DotNet_Library//SharpZipLib//SharpZipLib_0860_SourceSamples", "c://aa.zip", 9, 4096);

这个代码有一点点小问题没有异常处理压缩过程中有文件被编辑或者被删除那就无法压缩了

如果这样那也会异常：

z.CompressDirectory("C://CC", "C://CC//1.zip", 9, 4096);

（文/yudehui）

本文来源：http://blog.csdn.net/yudehui/article/details/6289179

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