Added FileProgressEventArgs, updated usage example.

Unzip.cs

@@ -74,6 +74,9 @@ public class Entry
 			public int DataOffset { get; set; }
 		}
 
+		/// <summary>
+		/// CRC32 calculation helper.
+		/// </summary>
 		public class Crc32Calculator
 		{
 			private static readonly uint[] Crc32Table =
@@ -125,12 +128,50 @@ public void UpdateWithBlock(byte[] buffer, int numberOfBytes)
 			}
 		}
 
+		/// <summary>
+		/// Provides data for the ExtractProgress event.
+		/// </summary>
+		public class FileProgressEventArgs : ProgressChangedEventArgs
+		{
+			/// <summary>
+			/// Initializes a new instance of the <see cref="FileProgressEventArgs"/> class.
+			/// </summary>
+			/// <param name="currentFile">The current file.</param>
+			/// <param name="totalFiles">The total files.</param>
+			/// <param name="fileName">Name of the file.</param>
+			public FileProgressEventArgs(int currentFile, int totalFiles, string fileName)
+				: base(totalFiles != 0 ? currentFile * 100 / totalFiles : 100, fileName)
+			{
+				CurrentFile = currentFile;
+				TotalFiles = totalFiles;
+				FileName = fileName;
+			}
+
+			/// <summary>
+			/// Gets the current file.
+			/// </summary>
+			public int CurrentFile { get; private set; }
+
+			/// <summary>
+			/// Gets the total files.
+			/// </summary>
+			public int TotalFiles { get; private set; }
+
+			/// <summary>
+			/// Gets the name of the file.
+			/// </summary>
+			public string FileName { get; private set; }
+		}
+
 		private const int EntrySignature = 0x02014B50;
 		private const int FileSignature = 0x04034b50;
 		private const int DirectorySignature = 0x06054B50;
 		private const int BufferSize = 16 * 1024;
 
-		public event Action<int, int> ExtractProgress;
+		/// <summary>
+		/// Occurs when a file or a directory is extracted from an archive.
+		/// </summary>
+		public event EventHandler<FileProgressEventArgs> ExtractProgress;
 
 		/// <summary>
 		/// Initializes a new instance of the <see cref="Unzip" /> class.
@@ -194,10 +235,11 @@ public void ExtractToDirectory(string directoryName)
 				{
 					Extract(entry.Name, fileName);
 				}
-
-				if (ExtractProgress != null)
+
+				var extractProgress = ExtractProgress;
+				if (extractProgress != null)
 				{
-					ExtractProgress(index + 1, Entries.Length);
+					extractProgress(this, new FileProgressEventArgs(index + 1, Entries.Length, entry.Name));
 				}
 			}
 		}

UsageExample.cs

@@ -1,48 +1,52 @@
-// Unzip class usage example
-// Written by Alexey Yakovlev <[email protected]>
-// https://github.com/yallie/unzip
-
-using System;
-using System.Linq;
-
-namespace Internals
-{
-	internal struct Program
-	{
-		private static void Main(string[] args)
-		{
-			if (args.Length < 2)
-			{
-				Console.WriteLine("Syntax: unzip Archive.zip TargetDirectory");
-				return;
-			}
-
-			var archiveName = args.First();
-			var outputDirectory = args.Last();
-
-			using (var unzip = new Unzip(archiveName))
-			{
-				ListFiles(unzip);
-
-				unzip.ExtractToDirectory(outputDirectory);
-			}
-		}
-
-		private static void ListFiles(Unzip unzip)
-		{
-			var tab = unzip.Entries.Any(e => e.IsDirectory) ? "\t" : string.Empty;
-
-			foreach (var entry in unzip.Entries.OrderBy(e => e.Name))
-			{
-				if (entry.IsFile)
-				{
-					Console.WriteLine(tab + "{0}: {1} -> {2}", entry.Name, entry.CompressedSize, entry.OriginalSize);
-				}
-				else if (entry.IsDirectory)
+// Unzip class usage example
+// Written by Alexey Yakovlev <[email protected]>
+// https://github.com/yallie/unzip
+
+using System;
+using System.Linq;
+
+namespace Internals
+{
+	internal struct Program
+	{
+		private static void Main(string[] args)
+		{
+			if (args.Length < 2)
+			{
+				Console.WriteLine("Syntax: unzip Archive.zip TargetDirectory");
+				return;
+			}
+
+			var archiveName = args.First();
+			var outputDirectory = args.Last();
+
+			using (var unzip = new Unzip(archiveName))
+			{
+				Console.WriteLine("Listing files in the archive:");
+				ListFiles(unzip);
+
+				Console.WriteLine("Extracting files from the archive:");
+				unzip.ExtractProgress += (s, e) => Console.WriteLine("{0} of {1}: {2}", e.CurrentFile, e.TotalFiles, e.FileName);
+				unzip.ExtractToDirectory(outputDirectory);
+			}
+		}
+
+		private static void ListFiles(Unzip unzip)
+		{
+			var tab = unzip.Entries.Any(e => e.IsDirectory) ? "\t" : string.Empty;
+
+			foreach (var entry in unzip.Entries.OrderBy(e => e.Name))
+			{
+				if (entry.IsFile)
 				{
-					Console.WriteLine(entry.Name);
+					Console.WriteLine(tab + "{0}: {1} -> {2}", entry.Name, entry.CompressedSize, entry.OriginalSize);
+					continue;
 				}
-			}
-		}
-	}
-}
+
+				Console.WriteLine(entry.Name);
+			}
+
+			Console.WriteLine();
+		}
+	}
+}