C#.NET: Compress/Decompress zip file using System.IO.Packaging

.NET 中常见的 ZIP 操作类库： SharpZipLib，J# Zip Library，zLib.NET。

.NET 3.0 开始，新增了 System.IO.Packaging.ZipPackage，从此再不用第三方的Lib了。

 1 using System;
 2 using System.Collections.Generic;
 3 using System.IO;
 4 using System.IO.Packaging;
 5 
 6 public class SharpZip
 7 {
 8     private const long BUFFER_SIZE = 4096;
 9 
10     public static void CompressFiles(List<string> fileNames, string zipFileName)
11     {
12         foreach (string file in fileNames)
13         {
14             CompressFile(zipFileName, file);
15         }
16     }
17 
18     public static void CompressFile(string zipFilename, string fileToAdd)
19     {
20         using (Package zip = System.IO.Packaging.Package.Open(zipFilename, FileMode.OpenOrCreate))
21         {
22             string destFilename = ".\\" + Path.GetFileName(fileToAdd);
23             Uri uri = PackUriHelper.CreatePartUri(new Uri(destFilename, UriKind.Relative));
24             if (zip.PartExists(uri))
25             {
26                 zip.DeletePart(uri);
27             }
28             PackagePart part = zip.CreatePart(uri, "", CompressionOption.Normal);
29             using (FileStream fileStream = new FileStream(fileToAdd, FileMode.Open, FileAccess.Read))
30             {
31                 using (Stream dest = part.GetStream())
32                 {
33                     CopyStream(fileStream, dest);
34                 }
35             }
36         }
37     }
38 
39     public static void DecompressFile(string zipFilename, string outPath)
40     {
41         using (Package zip = System.IO.Packaging.Package.Open(zipFilename, FileMode.Open))
42         {
43             foreach (PackagePart part in zip.GetParts())
44             {
45                 string outFileName = Path.Combine(outPath, part.Uri.OriginalString.Substring(1));
46                 using (System.IO.FileStream outFileStream = new System.IO.FileStream(outFileName, FileMode.Create))
47                 {
48                     using (Stream inFileStream = part.GetStream())
49                     {
50                         CopyStream(inFileStream, outFileStream);
51                     }
52                 }
53             }
54         }
55     }
56 
57     private static void CopyStream(System.IO.Stream inputStream, System.IO.Stream outputStream)
58     {
59         long bufferSize = inputStream.Length < BUFFER_SIZE ? inputStream.Length : BUFFER_SIZE;
60         byte[] buffer = new byte[bufferSize];
61         int bytesRead = 0;
62         long bytesWritten = 0;
63         while ((bytesRead = inputStream.Read(buffer, 0, buffer.Length)) != 0)
64         {
65             outputStream.Write(buffer, 0, bytesRead);
66             bytesWritten += bufferSize;
67         }
68     }
69 }