压缩文件或文件夹

 #region 压缩文件
        /// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="fileNames">要打包的文件列表</param>
        /// <param name="GzipFileName">目标文件名</param>
        /// <param name="CompressionLevel">压缩品质级别（0~9）</param>
        /// <param name="deleteFile">是否删除原文件</param>
        public static void CompressFile(List<FileInfo> fileNames, string GzipFileName, int CompressionLevel, bool deleteFile)
        {
            ZipOutputStream s = new ZipOutputStream(File.Create(GzipFileName));
            try
            {
                s.SetLevel(CompressionLevel);   //0 - store only to 9 - means best compression
                foreach (FileInfo file in fileNames)
                {
                    FileStream fs = null;
                    try
                    {
                        fs = file.Open(FileMode.Open, FileAccess.ReadWrite);
                    }
                    catch
                    { continue; }
                    //  方法二，将文件分批读入缓冲区
                    byte[] data = new byte[2048];
                    int size = 2048;
                    ZipEntry entry = new ZipEntry(Path.GetFileName(file.Name));
                    entry.DateTime = (file.CreationTime > file.LastWriteTime ? file.LastWriteTime : file.CreationTime);
                    s.PutNextEntry(entry);
                    while (true)
                    {
                        size = fs.Read(data, 0, size);
                        if (size <= 0) break;
                        s.Write(data, 0, size);
                    }
                    fs.Close();
                    if (deleteFile)
                    {
                        file.Delete();
                    }
                }
            }
            finally
            {
                s.Finish();
                s.Close();
            }
        }
        /// <summary>
        /// 压缩文件夹
        /// </summary>
        /// <param name="dirPath">要打包的文件夹</param>
        /// <param name="GzipFileName">目标文件名</param>
        /// <param name="CompressionLevel">压缩品质级别（0~9）</param>
        /// mark 代表需要壓縮的文件類型 默認為*.*
        /// <param name="deleteDir">是否删除原文件夹</param>
        public static void CompressDirectory(string dirPath, string GzipFileName, int CompressionLevel, bool deleteDir,string mark)
        {
            //压缩文件为空时默认与压缩文件夹同一级目录
            if (GzipFileName == string.Empty)
            {
                GzipFileName = dirPath.Substring(dirPath.LastIndexOf("//") + 1);
                GzipFileName = dirPath.Substring(0, dirPath.LastIndexOf("//")) + "//" + GzipFileName + ".zip";
            }
            //if (Path.GetExtension(GzipFileName) != ".zip")
            //{
            //    GzipFileName = GzipFileName + ".zip";
            //}
            using (ZipOutputStream zipoutputstream = new ZipOutputStream(File.Create(GzipFileName)))
            {
                zipoutputstream.SetLevel(CompressionLevel);
                Crc32 crc = new Crc32();
                Dictionary<string, DateTime> fileList = GetAllFies(dirPath,mark);
                foreach (KeyValuePair<string, DateTime> item in fileList)
                {
                    FileStream fs = File.OpenRead(item.Key.ToString());
                    byte[] buffer = new byte[fs.Length];
                    fs.Read(buffer, 0, buffer.Length);
                    ZipEntry entry = new ZipEntry(item.Key.Substring(dirPath.Length));
                    entry.DateTime = item.Value;
                    entry.Size = fs.Length;
                    fs.Close();
                    crc.Reset();
                    crc.Update(buffer);
                    entry.Crc = crc.Value;
                    zipoutputstream.PutNextEntry(entry);
                    zipoutputstream.Write(buffer, 0, buffer.Length);
                }
            }
            if (deleteDir)
            {
                Directory.Delete(dirPath, true);
            }
        }