using System;
using System.Collections.Generic;
using System.IO.Compression;
using System.Text;
using System.Data;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Xml;

namespace CommonClass
{
        /// <summary>
        /// 功    能:对数据的基本操作
        public class KCDataFormatter
        {
            public KCDataFormatter() { }
            /// <summary>
            /// 将DataSet格式化成字节数组byte[]
            /// </summary>
            /// <param name="dsOriginal">DataSet对象</param>
            /// <returns>字节数组</returns>
            public static byte[] GetBinaryFormatData(DataSet dsOriginal)
            {
                byte[] binaryDataResult = null;
                MemoryStream memStream = new MemoryStream();
                IFormatter brFormatter = new BinaryFormatter();
                dsOriginal.RemotingFormat = SerializationFormat.Binary;
                brFormatter.Serialize(memStream, dsOriginal);
                binaryDataResult = memStream.ToArray();
                memStream.Close();
                memStream.Dispose();
                return binaryDataResult;
            }
            /// <summary>
            /// 将DataSet格式化成字节数组byte[],并且已经经过压缩
            /// </summary>
            /// <param name="dsOriginal">DataSet对象</param>
            /// <returns>字节数组</returns>
            public static byte[] GetBinaryFormatDataCompress(DataSet dsOriginal)
            {
                byte[] binaryDataResult = null;
                MemoryStream memStream = new MemoryStream();
                IFormatter brFormatter = new BinaryFormatter();
                dsOriginal.RemotingFormat = SerializationFormat.Binary;
                brFormatter.Serialize(memStream, dsOriginal);
                binaryDataResult = memStream.ToArray();
                memStream.Close();
                memStream.Dispose();
                return Compress(binaryDataResult);
            }
            /// <summary>
            /// 解压数据
            /// </summary>
            /// <param name="data"></param>
            /// <returns></returns>
            public static byte[] Decompress(byte[] data)
            {
                byte[] bData;
                MemoryStream ms = new MemoryStream();
                ms.Write(data, 0, data.Length);
                ms.Position = 0;
                GZipStream stream = new GZipStream(ms, CompressionMode.Decompress, true);
                byte[] buffer = new byte[1024];
                MemoryStream temp = new MemoryStream();
                int read = stream.Read(buffer, 0, buffer.Length);
                while (read > 0)
                {
                    temp.Write(buffer, 0, read);
                    read = stream.Read(buffer, 0, buffer.Length);
                }
                //必须把stream流关闭才能返回ms流数据,不然数据会不完整
                stream.Close();
                stream.Dispose();
                ms.Close();
                ms.Dispose();
                bData = temp.ToArray();
                temp.Close();
                temp.Dispose();
                return bData;
            }
            /// <summary>
            /// 压缩数据
            /// </summary>
            /// <param name="data"></param>
            /// <returns></returns>
            public static byte[] Compress(byte[] data)
            {
                byte[] bData;
                MemoryStream ms = new MemoryStream();
                GZipStream stream = new GZipStream(ms, CompressionMode.Compress, true);
                stream.Write(data, 0, data.Length);
                stream.Close();
                stream.Dispose();
                //必须把stream流关闭才能返回ms流数据,不然数据会不完整
                //并且解压缩方法stream.Read(buffer, 0, buffer.Length)时会返回0
                bData = ms.ToArray();
                ms.Close();
                ms.Dispose();
                return bData;
            }
            /// <summary>
            /// 将字节数组反序列化成DataSet对象
            /// </summary>
            /// <param name="binaryData">字节数组</param>
            /// <returns>DataSet对象</returns>
            public static DataSet RetrieveDataSet(byte[] binaryData)
            {
                DataSet ds = null;
                MemoryStream memStream = new MemoryStream(binaryData,true);
                //byte[] bs = memStream.GetBuffer();
              
               // memStream.Write(bs, 0, bs.Length);
                //memStream.Seek(0, SeekOrigin.Begin);
                IFormatter brFormatter = new BinaryFormatter();
                ds =(DataSet)brFormatter.Deserialize(memStream);
                return ds;
            }
            /// <summary>
            /// 将字节数组反解压后序列化成DataSet对象
            /// </summary>
            /// <param name="binaryData">字节数组</param>
            /// <returns>DataSet对象</returns>
            public static DataSet RetrieveDataSetDecompress(byte[] binaryData)
            {
                DataSet dsOriginal = null;
                MemoryStream memStream = new MemoryStream(Decompress(binaryData));
                IFormatter brFormatter = new BinaryFormatter();
                Object obj = brFormatter.Deserialize(memStream);
                dsOriginal = (DataSet)obj;
                return dsOriginal;
            }
            /// <summary>
            /// 将object格式化成字节数组byte[]
            /// </summary>
            /// <param name="dsOriginal">object对象</param>
            /// <returns>字节数组</returns>
            public static byte[] GetBinaryFormatData(object dsOriginal)
            {
                byte[] binaryDataResult = null;
                MemoryStream memStream = new MemoryStream();
                IFormatter brFormatter = new BinaryFormatter();
                brFormatter.Serialize(memStream, dsOriginal);
                binaryDataResult = memStream.ToArray();
                memStream.Close();
                memStream.Dispose();
                return binaryDataResult;
            }
            /// <summary>
            /// 将objec格式化成字节数组byte[],并压缩
            /// </summary>
            /// <param name="dsOriginal">object对象</param>
            /// <returns>字节数组</returns>
            public static byte[] GetBinaryFormatDataCompress(object dsOriginal)
            {
                byte[] binaryDataResult = null;
                MemoryStream memStream = new MemoryStream();
                IFormatter brFormatter = new BinaryFormatter();
                brFormatter.Serialize(memStream, dsOriginal);
                binaryDataResult = memStream.ToArray();
                memStream.Close();
                memStream.Dispose();
                return Compress(binaryDataResult);
            }
            /// <summary>
            /// 将字节数组反序列化成object对象
            /// </summary>
            /// <param name="binaryData">字节数组</param>
            /// <returns>object对象</returns>
            public static object RetrieveObject(byte[] binaryData)
            {
                MemoryStream memStream = new MemoryStream(binaryData);
                IFormatter brFormatter = new BinaryFormatter();
                Object obj = brFormatter.Deserialize(memStream);
                return obj;
            }
            /// <summary>
            /// 将字节数组解压后反序列化成object对象
            /// </summary>
            /// <param name="binaryData">字节数组</param>
            /// <returns>object对象</returns>
            public static object RetrieveObjectDecompress(byte[] binaryData)
            {
                MemoryStream memStream = new MemoryStream(Decompress(binaryData));
                IFormatter brFormatter = new BinaryFormatter();
                Object obj = brFormatter.Deserialize(memStream);
                return obj;
            }
            ///// <summary>
            ///// 解密配置文件并读入到xmldoc中
            ///// </summary>
            //public static XmlNode DecryptConfigFile(string filePath)
            //{
            //    FileStream fs = new FileStream(filePath, FileMode.Open);
            //    XmlDocument m_XmlDoc = new XmlDocument();
            //    BinaryFormatter formatter = null;
            //    try
            //    {
            //        formatter = new BinaryFormatter();
            //        //   Deserialize   the   hashtable   from   the   file   and
            //        //   assign   the   reference   to   the   local   variable.
            //        m_XmlDoc.LoadXml(KCEncrypt.Decrypt((string)formatter.Deserialize(fs)));
            //        return m_XmlDoc.DocumentElement;
            //    }
            //    catch (SerializationException e)
            //    {
            //        Console.WriteLine("Failed   to   deserialize.   Reason:   " + e.Message);
            //        throw;
            //    }
            //    finally
            //    {
            //        fs.Close();
            //        fs = null;
            //    }
            //}
            ///// <summary>
            ///// 加密密钥后再对文件字符进行加密
            ///// </summary>
            //public static void EncryptConfigFile(string filePath, string str)
            //{
            //    FileStream fs = new FileStream(filePath, FileMode.Create);
            //    BinaryFormatter formatter = new BinaryFormatter();
            //    try
            //    {
            //        formatter.Serialize(fs, KCEncrypt.Encrypt(str));
            //    }
            //    catch (SerializationException e)
            //    {
            //        Console.WriteLine("Failed   to   serialize.   Reason:   " + e.Message);
            //        throw;
            //    }
            //    finally
            //    {
            //        fs.Close();
            //        fs = null;
            //    }
            //}
        }
}