C#实现Zip压缩目录中所有文件的方法

using System;using System.IO;using System.Collections;using System.IO.Compression;using System.Collections.Generic;class FolderZip{private const long BUFFER_SIZE = 20480;static void main(string[] args){string sourcepath=@"C:/tmp";Queue<FileSystemInfo> Folders = new Queue<FileSystemInfo>(new DirectoryInfo(sourcepath).GetFileSystemInfos());string copytopath = @"D:/temp";copytopath = (copytopath.LastIndexOf(Path.DirectorySeparatorChar) == copytopath.Length - 1) ? copytopath : copytopath+Path.DirectorySeparatorChar + Path.GetFileName(sourcepath);Directory.CreateDirectory(copytopath);while (Folders.Count > 0){ FileSystemInfo atom = Folders.Dequeue(); FileInfo sourcefile = atom as FileInfo; if (sourcefile == null) {  DirectoryInfo directory = atom as DirectoryInfo;  Directory.CreateDirectory(directory.FullName.Replace(sourcepath,copytopath));  foreach (FileSystemInfo nextatom in directory.GetFileSystemInfos())  Folders.Enqueue(nextatom); } else {  string sourcefilename = sourcefile.FullName;  string zipfilename = sourcefile.FullName.Replace(sourcepath,copytopath) + ".zip";  if (!File.Exists(zipfilename))  {   FileStream sourceStream = null;   FileStream destinationStream = null;   GZipStream compressedStream = null;   try   {    // Read the bytes from the source file into a byte array    sourceStream = new FileStream(sourcefilename, FileMode.Open, FileAccess.Read, FileShare.Read);    // Open the FileStream to write to    destinationStream = new FileStream(zipfilename, FileMode.OpenOrCreate, FileAccess.Write);    // Create a compression stream pointing to the destiantion stream    compressedStream = new DeflateStream(destinationStream, CompressionMode.Compress, true);    long bufferSize = sourceStream.Length < BUFFER_SIZE ? sourceStream.Length : BUFFER_SIZE;    byte[] buffer = new byte[bufferSize];    int bytesRead = 0;    long bytesWritten = 0;    while ((bytesRead = sourceStream.Read(buffer, 0, buffer.Length)) != 0)    {     compressedStream.Write(buffer, 0, bytesRead);     bytesWritten += bufferSize;    }   }   catch (ApplicationException)   {    continue;   }   finally   {    // Make sure we allways close all streams    if (sourceStream != null) sourceStream.Close();    if (compressedStream != null) compressedStream.Close();    if (destinationStream != null) destinationStream.Close();   }  } }}}}