If you sometimes find yourself in a situation where you need to unzip some files but really don't like the thought of having to roll out the big artillery (i.e., third-party libraries), then this simple zip archive unzipper might be the thing for you. It consists of just a single source file of about 200 lines of code, and is thus easily incorporated into your application. This way, you don't have to worry about third-party library dependencies and related deployment issues; simply compile the simple zip archive unzipper into your application, and you are ready to go.
The library supports zip-files with no compression, and zip-files compressed with the Deflate algorithm. This includes zip-files generated by the Windows Zip Shell extension (Send To -> Compressed (zipped) folder), zip-files generated by WinZip (with default compression settings at least), and zip-files generated by the Info-Zip tools.
Internally, the library only handles some simple parsing of the zip file headers. All the gory details of actually decompressing the data is left to the built-in System.IO.Compression.DeflateStream. As this class is available beginning with .NET 2.0, the library compiles and runs on the .NET 2.0, 3.0, and 3.5 platforms.
The library contains just one class, SimpleUnZipper, with a few static methods. To unzip a file on disk to a directory on disk, simply use the UnZipTo method:
Collapse Copy Code // Unzip archive to disk SimpleUnZipper.UnZipTo(@"c:\zipfile.zip", @"c:\foo\bar");This will unzip the files in 'c:\zipfile.zip' and place them in the 'c:\foo\bar' folder, creating a sub-folder structure on disk matching that of the zip-file.
The UnZipTo method also accepts a Stream as input:
Collapse Copy Code // Unzip from stream to disk using (var stream = File.OpenRead(@"c:\zipfile.zip")) { SimpleUnZipper.UnZipTo(stream, @"c:\foo\bar"); }To get the raw decompressed data from a zip file, use the UnZip methods:
Collapse Copy Code // Unzip archive manually foreach (var file in SimpleUnZipper.UnZip(@"c:\zipfile.zip")) { Console.WriteLine(file.Name); // Do something with file.Stream here... }The UnZip methods return an IEnumerable<UncompressedFile>, where each UncompressedFile has a Name property (the file name) and a Stream property (the decompressed file data). Note that an UncompressedFile might be a directory, in which case, the Name is a directory and the Stream has a length of zero.
This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)
转载：http://www.codeproject.com/KB/files/Simple_Unzipper.aspx
转载于:https://www.cnblogs.com/wuhenke/archive/2010/05/11/1733016.html
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