解压缩

/// 
        /// 解压缩文件        /// 
        /// 解压到目录        /// 文件字节流        public static void UnZip(string dirPath, byte[] bytes, ProgressBar pb, ProgressBar pbTotal)        {            pb.Minimum = 0;            pb.Value = 0;            pb.Maximum = ZipCount(bytes);            ZipInputStream s = new ZipInputStream(new MemoryStream(bytes));            ZipEntry theEntry;            while ((theEntry = s.GetNextEntry()) != null)            {                pb.Value++;                pbTotal.Value++;                string fileName = Path.GetFileName(theEntry.Name);                //生成解压目录                if (!Directory.Exists(dirPath))                {                    Directory.CreateDirectory(dirPath);                }                if (string.IsNullOrEmpty(fileName))                {                    string dir = System.IO.Path.Combine(dirPath, theEntry.Name);                    if (!Directory.Exists(dir))                    {                        Directory.CreateDirectory(dir);                    }                }                else                {                    //解压文件到指定的目录                    FileStream streamWriter = File.Create(System.IO.Path.Combine(dirPath, theEntry.Name));                    int size = 2048;                    byte[] data = new byte[2048];                    while (true)                    {                        size = s.Read(data, 0, data.Length);                        if (size > 0)                        {                            streamWriter.Write(data, 0, size);                        }                        else                        {                            break;                        }                    }                    streamWriter.Close();                }            }            s.Close();        }

/// 
        /// 计算文件数量        /// 
        ///         /// 
                public static int ZipCount(byte[] bytes)        {            int count = 0;            ZipInputStream s = new ZipInputStream(new MemoryStream(bytes));            ZipEntry theEntry;            while ((theEntry = s.GetNextEntry()) != null)            {                count++;            }            s.Close();            return count;        }