using System.IO;
using Xceed.Zip.ReaderWriter;
//The source Zip archive.
using (FileStream fileStream1 = new FileStream(@"d:\testOutput\test.zip",
  FileMode.Open, FileAccess.Read))
{
  //Must seek to the beginning of the stream before reading.
  fileStream1.Seek(0, SeekOrigin.Begin);
  //Create a ZipReader around the stream.
  Xceed.Zip.ReaderWriter.ZipReader zipReader1 =
    new Xceed.Zip.ReaderWriter.ZipReader(fileStream1);
  //Subscribe to the ByteProgression event
  zipReader1.ByteProgression +=
    new EventHandler<ZipReaderByteProgressionEventArgs>
    (zipReader1_ByteProgression);
  //Subscribe to the InvalidPassword event
  zipReader1.InvalidPassword +=
    new EventHandler<ZipReaderInvalidPasswordEventArgs>
    (zipReader1_InvalidPassword);
  ZipItemLocalHeader zipItemLocalHeader = null;
  //Read the local headers until no more are found
  while ((zipItemLocalHeader = zipReader1.ReadItemLocalHeader()) != null)
  {
    byte[] buffer = new byte[1024];
    int read = 0;
    //Read the item's data
    while ((read = zipReader1.ReadItemData(buffer, 0, buffer.Length)) > 0)
    {
      //Do something with the data in 'buffer'
    }
  }
}

//The InvalidPassword event's handler. Demonstrates the use of
//the properties of ZipReaderInvalidPasswordEventArgs.
static void zipReader1_InvalidPassword(object sender,
  ZipReaderInvalidPasswordEventArgs e)
{
  Console.Write("Enter password for file {0} (<Enter> alone to abort): ",
    e.ZipItemLocalHeader.FileName);
  string password = Console.ReadLine();
  if (string.IsNullOrEmpty(password))
  {
    //Set Abort to true to abort the read operation.
    e.Abort = true;
  }
  else
  {
    //Set NewPassword to the provided password. If it is the correct password,
    //the read operation will proceed. Otherwise, the InvalidPassword event is
    //raised again.
    e.NewPassword = password;
  }
}
//The ByteProgression event's handler. Demonstrates the use of
//the properties of ZipReaderByteProgressionEventArgs.
static void zipReader1_ByteProgression(object sender,
   ZipReaderByteProgressionEventArgs e)
{
  if (e.UncompressedSize == -1)
    Console.WriteLine("Processing item {0}: {1} bytes processed.",
      e.ZipItemLocalHeader.FileName, e.BytesProcessed);
  else
  {
    //UncompressedSize is not -1, so this property and the Percent property
    //return useful values.
    Console.WriteLine("Processing item {0}: {1} bytes processed ({3}%).
      (Uncompressed size = {3}.)",
      e.ZipItemLocalHeader.FileName,
      e.BytesProcessed,
      e.UncompressedSize,
      e.Percent);
  }
}