Zip方式压缩文件和解压缩文件代码代码,CSharp代码库,德仔网

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【CSharp】 Zip方式压缩文件和解压缩文件代码
作者:Dezai.CN / 发布于2013/2/23/ 914
压缩和解压缩分为：单一文件压缩和整个文件夹压缩，其中文件夹压缩现在还没实现递归文件夹，现已够用测试通过

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

	namespace Common
	{
	 /// <summary>
	 /// 压缩文件
	 /// </summary>
	 public class Zip
	 {
	 #region 压缩解压单一文件
	 /// <summary>
	 /// 压缩单一文件
	 /// </summary>
	 /// <param name="sourceFile">源文件路径</param>
	 /// <param name="destinationFile">目标文件路径</param>
	 public static void CompressFile(string sourceFile, string destinationFile)
	 {
	 if (!File.Exists(sourceFile)) throw new FileNotFoundException();
	 using (FileStream sourceStream = new FileStream(sourceFile, FileMode.Open, FileAccess.Read, FileShare.Read))
	 {
	 byte[] buffer = new byte[sourceStream.Length];
	 int checkCounter = sourceStream.Read(buffer, 0, buffer.Length);
	 if (checkCounter != buffer.Length) throw new ApplicationException();
	 using (FileStream destinationStream = new FileStream(destinationFile, FileMode.OpenOrCreate, FileAccess.Write))
	 {
	 using (GZipStream compressedStream = new GZipStream(destinationStream, CompressionMode.Compress, true))
	 {
	 compressedStream.Write(buffer, 0, buffer.Length);
	 }
	 }
	 }
	 }
	 public static void CompressFile(byte[] source, string destinationFile)
	 {
	 using (FileStream destinationStream = new FileStream(destinationFile, FileMode.OpenOrCreate, FileAccess.Write))
	 {
	 using (GZipStream compressedStream = new GZipStream(destinationStream, CompressionMode.Compress, true))
	 {
	 compressedStream.Write(source, 0, source.Length);
	 }
	 }
	 }

	 /// <summary>
	 /// 解压缩文件
	 /// </summary>
	 /// <param name="sourceFile">源文件路径</param>
	 /// <param name="destinationFile">目标文件路径</param>
	 public static void DecompressFile(string sourceFile, string destinationFile)
	 {
	 if (!File.Exists(sourceFile)) throw new FileNotFoundException();
	 using (FileStream sourceStream = new FileStream(sourceFile, FileMode.Open))
	 {
	 byte[] quartetBuffer = new byte[4];
	 int position = (int)sourceStream.Length - 4;
	 sourceStream.Position = position;
	 sourceStream.Read(quartetBuffer, 0, 4);
	 sourceStream.Position = 0;
	 int checkLength = BitConverter.ToInt32(quartetBuffer, 0);
	 byte[] buffer = new byte[checkLength + 100];
	 using (GZipStream decompressedStream = new GZipStream(sourceStream, CompressionMode.Decompress, true))
	 {
	 int total = 0;
	 for (int offset = 0; ; )
	 {
	 int bytesRead = decompressedStream.Read(buffer, offset, 100);
	 if (bytesRead == 0) break;
	 offset += bytesRead;
	 total += bytesRead;
	 }
	 using (FileStream destinationStream = new FileStream(destinationFile, FileMode.Create))
	 {
	 destinationStream.Write(buffer, 0, total);
	 destinationStream.Flush();
	 }
	 }
	 }
	 }

	 #endregion

	 #region 压缩解压文件夹
	 /**/
	 /// <summary>
	 /// 对目标文件夹进行压缩，将压缩结果保存为指定文件
	 /// </summary>
	 /// <param name="dirPath">目标文件夹</param>
	 /// <param name="fileName">压缩文件</param>
	 public static void CompressFolder(string dirPath, string fileName)
	 {
	 ArrayList list = new ArrayList();
	 foreach (string f in Directory.GetFiles(dirPath))
	 {
	 byte[] destBuffer = File.ReadAllBytes(f);
	 SerializeFileInfo sfi = new SerializeFileInfo(f, destBuffer);
	 list.Add(sfi);
	 }
	 IFormatter formatter = new BinaryFormatter();
	 using (Stream s = new MemoryStream())
	 {
	 formatter.Serialize(s, list);
	 s.Position = 0;
	 CreateCompressFile(s, fileName);
	 }
	 }
	 /**/
	 /// <summary>
	 /// 对目标压缩文件解压缩，将内容解压缩到指定文件夹
	 /// </summary>
	 /// <param name="fileName">压缩文件</param>
	 /// <param name="dirPath">解压缩目录</param>
	 public static void DeCompressFolder(string fileName, string dirPath)
	 {
	 using (Stream source = File.OpenRead(fileName))
	 {
	 using (Stream destination = new MemoryStream())
	 {
	 using (GZipStream input = new GZipStream(source, CompressionMode.Decompress, true))
	 {
	 byte[] bytes = new byte[4096];
	 int n;
	 while ((n = input.Read(bytes, 0, bytes.Length)) != 0)
	 {
	 destination.Write(bytes, 0, n);
	 }
	 }
	 destination.Flush();
	 destination.Position = 0;
	 DeSerializeFiles(destination, dirPath);
	 }
	 }
	 }
	 private static void DeSerializeFiles(Stream s, string dirPath)
	 {
	 BinaryFormatter b = new BinaryFormatter();
	 ArrayList list = (ArrayList)b.Deserialize(s);
	 foreach (SerializeFileInfo f in list)
	 {
	 string newName = dirPath + Path.GetFileName(f.FileName);
	 using (FileStream fs = new FileStream(newName, FileMode.Create, FileAccess.Write))
	 {
	 fs.Write(f.FileBuffer, 0, f.FileBuffer.Length);
	 fs.Close();
	 }
	 }
	 }
	 private static void CreateCompressFile(Stream source, string destinationName)
	 {
	 using (Stream destination = new FileStream(destinationName, FileMode.Create, FileAccess.Write))
	 {
	 using (GZipStream output = new GZipStream(destination, CompressionMode.Compress))
	 {
	 byte[] bytes = new byte[4096];
	 int n;
	 while ((n = source.Read(bytes, 0, bytes.Length)) != 0)
	 {
	 output.Write(bytes, 0, n);
	 }
	 }
	 }
	 }

	 #endregion
	 }
	 //测试
	 //private void btnZip_Click(object sender, EventArgs e)
	 //{
	 // Common.Zip.CompressFile("database.mdb", "test.zip");
	 // Common.Zip.CompressFolder("sourcefolder", "sourcefolder.zip");
	 //}

	 //private void btnUnZip_Click(object sender, EventArgs e)
	 //{
	 // Common.Zip.DecompressFile("test.zip", "database2.mdb");
	 // Common.Zip.DeCompressFolder("sourcefolder.zip", "folder/");
	 //}
	 [Serializable]
	 class SerializeFileInfo
	 {
	 public SerializeFileInfo(string name, byte[] buffer)
	 {
	 fileName = name;
	 fileBuffer = buffer;
	 }
	 string fileName;
	 public string FileName
	 {
	 get
	 {
	 return fileName;
	 }
	 }
	 byte[] fileBuffer;
	 public byte[] FileBuffer
	 {
	 get
	 {
	 return fileBuffer;
	 }
	 }
	 }
	}
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