System.IO.Compression下的2个类搞了好久，原因看注释

 

System.IO.Compression下的2个类搞了好久，原因看注视

        public static byte[] Compression(byte[] data, CompressionMode mode)
        ...{
            DeflateStream zip = null;
            try
            ...{
                if (mode == CompressionMode.Compress)
                ...{
                    MemoryStream ms = new MemoryStream();
                    zip = new DeflateStream(ms, mode, true);
                    zip.Write(data, 0, data.Length);
                    zip.Close();               //在返回处理结果前一定要把流关闭，否则取得的数据不完整
                    return ms.ToArray(); //我比较习惯于在finally中关闭，这个问题弄了好久。用using的话要把return放在using范围外
                }
                else
                ...{
                    MemoryStream ms = new MemoryStream();
                    ms.Write(data, 0, data.Length);
                    ms.Flush();
                    ms.Position = 0;
                    zip = new DeflateStream(ms, mode, true);
                    MemoryStream os = new MemoryStream();
                    int SIZE = 1024;
                    byte[] buf = new byte[SIZE];
                    int l = 0;
                    do
                    ...{
                        l = zip.Read(buf, 0, SIZE);  //第一次读入时居然返回0字节

                        if (l == 0) l = zip.Read(buf, 0, SIZE);//只好加了这行代码
                        os.Write(buf, 0, l);
                    }while(l != 0);
                    zip.Close();              //在返回处理结果前一定要把流关闭，否则取得的数据不完整
                    return os.ToArray(); //我比较习惯于在finally中关闭，这个问题弄了好久。用using的话要把return放在using范围外
                }
            }
            catch
            ...{
                return null;
            }
            finally
            ...{
                if (zip != null) zip.Close();
            }
        }