压缩解压缩传输的数据

压缩：

  /// <summary>
        /// 把datatable数据转换成字节数组，然后压缩字节数组。
        /// </summary>
        /// <param name="data">查询得到的数据表</param>
        /// <returns>返回被压缩的字节数组</returns>
        public static byte[] GzipCompress(DataTable data)
        {
            if (data == null || data.Rows.Count <= 0)
                return null;
            byte[] result = null;
            byte[] retbyte = null;//压缩后返回的字节数组
            try
            {
                using (MemoryStream stream = new MemoryStream())
                {
                    BinaryFormatter formatter = new BinaryFormatter();
                    formatter.Serialize(stream, data);
                    result = stream.GetBuffer();
                }
                if (result != null)
                {
                    using (MemoryStream stream = new MemoryStream())
                    {
                        using (GZipStream gZipStream = new GZipStream(stream, CompressionMode.Compress))
                        {
                            gZipStream.Write(result, 0, result.Length);
                            gZipStream.Close();
                        }
                        retbyte=stream.ToArray();
                    }
                }
                return retbyte;
            }
            catch (Exception)
            {
                return result;
            }
        }

public static byte[] GzipCompress(byte[] data)
{
if (data == null || data.Length < 1)
return data;
try
{
using (MemoryStream stream = new MemoryStream())
{
using (GZipStream gZipStream = new GZipStream(stream, CompressionMode.Compress))
{
gZipStream.Write(data, 0, data.Length);
gZipStream.Close();
}
return stream.ToArray();
}
}
catch (Exception)
{
return data;
}

}

byte[] retbyte = GzipCompress(retvalue);   //retvalue为datatable 

return Json(retbyte);

解压缩：

        /// <summary>
        /// 解压数据。
        /// </summary>
        /// <param name="ret">api中获取的结果，被压缩过的</param>
        public static DataTable DecompressByteToDatatble(string ret)
        {
            byte[] retbyte = JsonConvert.DeserializeObject<byte[]>(ret);
            //解压后得到的字节数组。
            byte[] decBuffer = DecompressByte(retbyte);
            DataTable retdt = null;
            if (decBuffer != null && decBuffer.Length > 0)
            {
                using (MemoryStream memoryStream = new MemoryStream(decBuffer))
                {
                    BinaryFormatter binaryFormatter = new BinaryFormatter();
                    retdt = (DataTable)binaryFormatter.Deserialize(memoryStream);
                }
            }
            return retdt;
        }

/// <summary>
/// 解压数据。
/// </summary>
/// <param name="ret">api中获取的结果，被压缩过的</param>
public static DataTable DecompressByteToDatatble(string ret)
{
byte[] retbyte = JsonConvert.DeserializeObject<byte[]>(ret);
//解压后得到的字节数组。
byte[] decBuffer = DecompressByte(retbyte);
DataTable retdt = null;
if (decBuffer != null && decBuffer.Length > 0)
{
using (MemoryStream memoryStream = new MemoryStream(decBuffer))
{
BinaryFormatter binaryFormatter = new BinaryFormatter();
retdt = (DataTable)binaryFormatter.Deserialize(memoryStream);
}
}
return retdt;
}

 ds = DecompressByteToDatatble(ret);   //ret为取到的json