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
// the created file would be invalid.
s.Finish();
// Close is important to wrap things up and unlock the file.
s.Close();
}
}
catch(Exception ex)
{
Console.WriteLine("Exception during processing {0}", ex);
// No need to rethrow the exception as for our purposes its handled.
}
}
}