解压文件 ，引用 SharpZipLib.dll类库
方法一：
public void UnGzipFile(string zipfilename) { //同压缩文件同级同名的非压缩文件路径 var path = zipfilename.Replace(Path.GetFileName(zipfilename), Path.GetFileNameWithoutExtension(zipfilename)); //创建压缩文件的输入流实例 using (GZipInputStream zipFile = new GZipInputStream(File.OpenRead(zipfilename))) { //创建目标文件的流 using (FileStream destFile = new FileStream(path, FileMode.Create)) { int buffersize = 2048;//缓冲区的尺寸，一般是2048的倍数 byte[] FileData = new byte[buffersize];//创建缓冲数据 while (buffersize > 0)//一直读取到文件末尾 { buffersize = zipFile.Read(FileData, 0, buffersize);//读取压缩文件数据 destFile.Write(FileData, 0, buffersize);//写入目标文件 } destFile.Flush(); } } } 方法二：
////// 引用 SharpZipLib.dll /// /// 压缩文件 /// 解压文件 public void gunZipFile(string zipFilePath, string filePath) { using (Stream inStream = new GZipInputStream(File.OpenRead(zipFilePath))) { using (FileStream outStream = new FileStream(filePath, FileMode.Create)) { byte[] buf = new byte[4096]; StreamUtils.Copy(inStream, outStream, buf); } } }
压缩
////// 压缩文件 /// /// 文件路径 /// 压缩后的文件路径 public static void gZipFile(string filePath, string zipFilePath) { Stream s = new GZipOutputStream(File.Create(zipFilePath)); FileStream fs = File.OpenRead(filePath); int size; byte[] buf = new byte[4096]; do { size = fs.Read(buf, 0, buf.Length); s.Write(buf, 0, size); } while (size > 0); s.Close(); fs.Close(); }
文章来源：http://walkerqt.blog.51cto.com/1310630/1706239