C# 解压与压缩文件

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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 = ;//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 > )//一直读取到文件末尾

                    {

                        buffersize = zipFile.Read(FileData, , buffersize);//读取压缩文件数据

                        destFile.Write(FileData, , buffersize);//写入目标文件

                    }

                    destFile.Flush();

                }

            }

        }

方法二：

        /// <summary>

        /// 引用 SharpZipLib.dll

        /// </summary>

        /// <param name="zipFilePath">压缩文件</param>

        /// <param name="filePath">解压文件</param>

        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[];

                    StreamUtils.Copy(inStream, outStream, buf);

                }

            }

        }

压缩

        /// <summary>

        /// 压缩文件

        /// </summary>

        /// <param name="filePath">文件路径</param>

        /// <param name="zipFilePath">压缩后的文件路径</param>

        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[];

            do

            {

                size = fs.Read(buf, , buf.Length);

                s.Write(buf, , size);

            } while (size > );

            s.Close();

            fs.Close();

        }