[转][C#]压缩解压缩类 GZipStream
using System; using System.IO; using System.IO.Compression; namespace zip { public class Program { public static void Main() { // Path to directory of files to compress and decompress. string dirpath = @"c:\users\public\reports"; DirectoryInfo di = new DirectoryInfo(dirpath); // Compress the directory's files. foreach (FileInfo fi in di.GetFiles()) { Compress(fi); } // Decompress all *.gz files in the directory. foreach (FileInfo fi in di.GetFiles("*.gz")) { Decompress(fi); } } public static void Compress(FileInfo fi) { // Get the stream of the source file. using (FileStream inFile = fi.OpenRead()) { // Prevent compressing hidden and // already compressed files. if ((File.GetAttributes(fi.FullName) & FileAttributes.Hidden) != FileAttributes.Hidden & fi.Extension != ".gz") { // Create the compressed file. using (FileStream outFile = File.Create(fi.FullName + ".gz")) { using (GZipStream Compress = new GZipStream(outFile, CompressionMode.Compress)) { // Copy the source file into // the compression stream. inFile.CopyTo(Compress); Console.WriteLine("Compressed {0} from {1} to {2} bytes.", fi.Name, fi.Length.ToString(), outFile.Length.ToString()); } } } } } public static void Decompress(FileInfo fi) { // Get the stream of the source file. using (FileStream inFile = fi.OpenRead()) { // Get original file extension, for example // "doc" from report.doc.gz. string curFile = fi.FullName; string origName = curFile.Remove(curFile.Length - fi.Extension.Length); //Create the decompressed file. using (FileStream outFile = File.Create(origName)) { using (GZipStream Decompress = new GZipStream(inFile, CompressionMode.Decompress)) { // Copy the decompression stream // into the output file. Decompress.CopyTo(outFile); Console.WriteLine("Decompressed: {0}", fi.Name); } } } } } }
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