C# -- 文件的压缩与解压（GZipStream）

文件的压缩与解压

需引入 System.IO.Compression;

1.C#代码（入门案例）

            Console.WriteLine("压缩文件...............");
            using (FileStream fr = File.OpenRead("d:\test.txt"))
            {
                using (FileStream fw = File.OpenWrite("d:\test.zip"))
                {
                    using (GZipStream gz = new GZipStream(fw, CompressionMode.Compress))
                    {

                        byte[] by = new byte[1024 * 1024];
                        int r = fr.Read(by, 0, by.Length);
                        while (r > 0)
                        {
                            gz.Write(by, 0, r);
                            r = fr.Read(by, 0, r);
                        }
                    }
                }
            }
            Console.WriteLine("压缩完成。");


            Console.WriteLine("解压文件...............");
            using (FileStream fr = File.OpenRead("d:\test.zip"))
            {
                using (GZipStream gz = new GZipStream(fr, CompressionMode.Decompress))
                {
                    using (FileStream fw = File.OpenWrite("d:\test2.txt"))
                    {

                        byte[] by = new byte[1024 * 1024];
                        int r = gz.Read(by, 0, by.Length);
                        while (r > 0)
                        {
                            fw.Write(by, 0, r);
                            r = gz.Read(by, 0, r);
                        }
                    }
                }
            }
            Console.WriteLine("解压完成。");

            Console.ReadKey();

2. 运行结果