public static void Main(string[] args) { // Perform some simple parameter checking. More could be done // like checking the target file name is ok, disk space, and lots // of other things, but for a demo this covers some obvious traps. if ( args.Length < 2 ) { Console.WriteLine("Usage: CreateZipFile Path ZipFile"); return; }
try { // Depending on the directory this could be very large and would require more attention // in a commercial package. string[] filenames = Directory.GetFiles(args[0]);
// 'using' statements gaurantee the stream is closed properly which is a big source // of problems otherwise. Its exception safe as well which is great. using (ZipOutputStream s = new ZipOutputStream(File.Create(args[1]))) {
s.SetLevel(9); // 0 - store only to 9 - means best compression
byte[] buffer = new byte[4096];
foreach (string file in filenames) {
// Using GetFileName makes the result compatible with XP // as the resulting path is not absolute. ZipEntry entry = new ZipEntry(Path.GetFileName(file));
// Setup the entry data as required.
// Crc and size are handled by the library for seakable streams // so no need to do them here.
// Could also use the last write time or similar for the file. entry.DateTime = DateTime.Now; s.PutNextEntry(entry);
using ( FileStream fs = File.OpenRead(file) ) {
// Using a fixed size buffer here makes no noticeable difference for output // but keeps a lid on memory usage. int sourceBytes; do { sourceBytes = fs.Read(buffer, 0, buffer.Length); s.Write(buffer, 0, sourceBytes); } while ( sourceBytes > 0 ); } }
// Finish/Close arent needed strictly as the using statement does this automatically
// Finish is important to ensure trailing information for a Zip file is appended. Without this