110 lines
3.5 KiB
C#
110 lines
3.5 KiB
C#
using System;
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using System.IO;
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using System.IO.Compression;
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using System.Runtime.Serialization.Formatters.Binary;
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namespace DeviceRepair.Utils
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{
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/// <summary>
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/// 数据 GZip压缩
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/// </summary>
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public static class CompressionHelper
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{
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#region 对象转byte[]
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/// <summary>
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/// 转数据集并压缩
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/// </summary>
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/// <param name="obj"></param>
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/// <returns></returns>
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public static byte[] ToArrayAndCompress(this object obj)
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{
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if (obj == null)
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return null;
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byte[] bytes;
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BinaryFormatter formatter = new BinaryFormatter();
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using (MemoryStream memoryStream = new MemoryStream())
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{
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formatter.Serialize(memoryStream, obj);
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bytes = memoryStream.ToArray();
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}
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return Compress(bytes);
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}
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/// <summary>
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/// 解压缩并转化到对象
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/// </summary>
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/// <typeparam name="T"></typeparam>
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/// <param name="bytes"></param>
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/// <returns></returns>
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public static T DecompressAndSerializeObject<T>(this byte[] bytes) where T : class
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{
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byte[] debyte = Decompress(bytes);
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BinaryFormatter formatter = new BinaryFormatter();
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using (MemoryStream stream = new MemoryStream(debyte))
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{
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object obj = formatter.Deserialize(stream);
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return (T)obj;
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}
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}
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#endregion
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/// <summary>
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/// 压缩
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/// </summary>
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/// <param name="data"></param>
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/// <returns></returns>
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public static byte[] Compress(this byte[] data)
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{
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using (var compressedStream = new MemoryStream())
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{
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using (var zipStream = new GZipStream(compressedStream, CompressionMode.Compress))
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{
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zipStream.Write(data, 0, data.Length);
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zipStream.Close();
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return compressedStream.ToArray();
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}
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}
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}
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/// <summary>
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/// 解压
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/// </summary>
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/// <param name="data"></param>
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/// <returns></returns>
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public static byte[] Decompress(this byte[] data)
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{
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using (var compressedStream = new MemoryStream(data))
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{
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using (var zipStream = new GZipStream(compressedStream, CompressionMode.Decompress))
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{
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using (var resultStream = new MemoryStream())
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{
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zipStream.CopyTo(resultStream);
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return resultStream.ToArray();
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}
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}
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}
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}
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/// <summary>
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/// 将传入字符串以GZip算法压缩后，返回Base64编码字符
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/// </summary>
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/// <param name="rawString">需要压缩的字符串</param>
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/// <returns>压缩后的Base64编码的字符串</returns>
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public static string GZipCompressString(string rawString)
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{
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if (string.IsNullOrEmpty(rawString) || rawString.Length == 0)
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{
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return "";
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}
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else
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{
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byte[] rawData = System.Text.Encoding.UTF8.GetBytes(rawString.ToString());
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byte[] zippedData = Compress(rawData);
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return (string)(Convert.ToBase64String(zippedData));
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}
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}
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}
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}
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