.NET 4.5 压缩

 在.NET 4.5中新加入的压缩的命名空间和方法。可以抛弃ICSharpCode.SharpZipLib.dll 这个类库了。性能上不相上下。但是能够大大简化你的代码。如果开始使用.NET FrameWork4.5 做压缩不妨试试自带的压缩方法.

传统使用ICSharpCode.SharpZipLib.dll 所写的代码。

static void Main(string[] args)

        {

            Stopwatch watch = new Stopwatch();

            watch.Start();

            string path = @"E:\";        

            Compress(Directory.GetFiles(path), @"F:\4.0.zip");

            watch.Stop();

            Console.WriteLine("消耗时间:{0}", watch.ElapsedMilliseconds);

            FileInfo f = new FileInfo(@"F:\4.0.zip");

            Console.WriteLine("文件大小{0}", f.Length);

        }



        static void Compress(string[] filePaths, string zipFilePath)

        {

            byte[] _buffer = new byte[4096];

            if (!Directory.Exists(zipFilePath))

                Directory.CreateDirectory(Path.GetDirectoryName(zipFilePath));

            using (ZipOutputStream zip = new ZipOutputStream(File.Create(zipFilePath)))

            {

                foreach (var item in filePaths)

                {

                    if (!File.Exists(item))

                    {

                        Console.WriteLine("the file {0} not exist!", item);

                    }

                    else

                    {

                        ZipEntry entry = new ZipEntry(Path.GetFileName(item));

                        entry.DateTime = DateTime.Now;

                        zip.PutNextEntry(entry);

                        using (FileStream fs = File.OpenRead(item))

                        {

                            int sourceBytes;

                            do

                            {

                                sourceBytes = fs.Read(_buffer, 0, _buffer.Length);

                                zip.Write(_buffer, 0, sourceBytes);

                            } while (sourceBytes > 0);

                        }

                    }

                }

                zip.Finish();

                zip.Close();

            }

        }

使用.NET FrameWork 4.5中自带的压缩。

static void Main(string[] args)

        {

            Stopwatch watch = new Stopwatch();

            watch.Start();

            string path = @"E:\";

            Compress(path, @"F:\4.5.zip");

            watch.Stop();

            Console.WriteLine("消耗时间:{0}", watch.ElapsedMilliseconds);

            FileInfo f = new FileInfo(@"F:\4.5.zip");

            Console.WriteLine("文件大小{0}", f.Length);

        }

        static void Compress(string filePath, string zipFilePath)

        {

            ZipFile.CreateFromDirectory(filePath, zipFilePath, CompressionLevel.Fastest, false);

        }

怎么样代码是不是简洁了很多呢？