zip file Helper

public class ZipFileHelper
{
	#region Public Delegates

	public delegate void ZippingListProgressEvent(int entriesTotal, int entriesSaved);
	public delegate void ZippingFileProgressEvent(int fileProgress);
	public delegate void ZippingDoneEvent();
	public delegate void UnzippingProgressEvent(int progress);

	#endregion Public Delegates

	#region Public Events

	public event ZippingDoneEvent ZippingDone;
	public event ZippingListProgressEvent ZippingListProgress;
	public event ZippingFileProgressEvent ZippingFileProgress;
	public event UnzippingProgressEvent Unzipping;

	#endregion Public Events

	#region Public Methods

	int _numEntriesToAdd = 0;
	int _numEntriesAdded = 0;

	public void CreateZipFile(string directoryPath, string zipFilePath)
	{
		using (ZipFile zip = new ZipFile())
		{
			// add this map file into the "images" directory in the zip archive
			//zip.AddFile("c:\\images\\personal\\7440-N49th.png", "images");
			// add the report into a different directory in the archive
			//zip.AddFile("c:\\Reports\\2008-Regional-Sales-Report.pdf", "files");
			//zip.AddFile("ReadMe.txt");

			zip.SaveProgress += zip_SaveProgress;
			zip.AddProgress += zip_AddProgress;
			zip.AddDirectory(directoryPath);
			zip.Save(zipFilePath);
		}
	}

	public void CreateZipFile(string directoryPath, string zipFilePath, string strPassword)
	{
		using (ZipFile zip = new ZipFile())
		{
			// add this map file into the "images" directory in the zip archive
			//zip.AddFile("c:\\images\\personal\\7440-N49th.png", "images");
			// add the report into a different directory in the archive
			//zip.AddFile("c:\\Reports\\2008-Regional-Sales-Report.pdf", "files");
			//zip.AddFile("ReadMe.txt");
			if (!strPassword.IsNullOrEmpty())
			{
				zip.Password = strPassword;
				zip.Encryption = EncryptionAlgorithm.WinZipAes256;
			}
			zip.SaveProgress += zip_SaveProgress;
			zip.AddProgress += zip_AddProgress;
			zip.AddDirectory(directoryPath);
			zip.Save(zipFilePath);
		}
	}

	public void CreateZipFileFromMultiFolder(string[] arrDirectoryPath, string zipFilePath, string strPassword)
	{
		using (ZipFile zip = new ZipFile())
		{
			// add this map file into the "images" directory in the zip archive
			//zip.AddFile("c:\\images\\personal\\7440-N49th.png", "images");
			// add the report into a different directory in the archive
			//zip.AddFile("c:\\Reports\\2008-Regional-Sales-Report.pdf", "files");
			//zip.AddFile("ReadMe.txt");
			if (!strPassword.IsNullOrEmpty())
			{
				zip.Password = strPassword;
				zip.Encryption = EncryptionAlgorithm.WinZipAes256;
			}
			zip.SaveProgress += zip_SaveProgress;
			zip.AddProgress += zip_AddProgress;

			string[] folderName = new string[arrDirectoryPath.GetLength(0)];
			int i = 0;
			foreach (string path in arrDirectoryPath)
			{
				int index = arrDirectoryPath[0].LastIndexOf("\\");
				folderName[i] = path.Substring(index + 1);
				zip.AddDirectory(path, folderName[i]);
			}
			zip.Save(zipFilePath);
		}
	}

	void zip_AddProgress(object sender, AddProgressEventArgs e)
	{
		switch (e.EventType)
		{
			case ZipProgressEventType.Adding_Started:
				Console.WriteLine("Adding files to the zip...");
				break;
			case ZipProgressEventType.Adding_AfterAddEntry:
				_numEntriesAdded++;
				Console.WriteLine(String.Format("Adding file {0}/{1} :: {2}",
										_numEntriesAdded, _numEntriesToAdd, e.CurrentEntry.FileName));
				break;
			case ZipProgressEventType.Adding_Completed:
				Console.WriteLine("Added all files");
				break;
		}
				 
	}

	public void CreateZipFile(string[] files, string zipFilePath)
	{
		using (ZipFile zip = new ZipFile())
		{
			zip.SaveProgress += zip_SaveProgress;

			foreach (string file in files)
			{
				zip.AddFile(file);
			}
			zip.Save(zipFilePath);
		}
	}

	public void CreateZipFileFromFile(string directoryFile, string fileNameInArchive, string zipFilePath, string strPassword)
	{
		using (ZipFile zip = new ZipFile())
		{
			// add this map file into the "images" directory in the zip archive
			//zip.AddFile("c:\\images\\personal\\7440-N49th.png", "images");
			// add the report into a different directory in the archive
			//zip.AddFile("c:\\Reports\\2008-Regional-Sales-Report.pdf", "files");
			//zip.AddFile("ReadMe.txt");
			if (!strPassword.IsNullOrEmpty())
			{
				zip.Password = strPassword;
				zip.Encryption = EncryptionAlgorithm.WinZipAes256;
			}
			zip.SaveProgress += zip_SaveProgress;
			zip.AddProgress += zip_AddProgress;
			zip.AddFile(directoryFile, fileNameInArchive);
			//zip.ParallelDeflateThreshold = -1;
			zip.Save(zipFilePath);
		}
	}

	public bool ExtractZIPFile(string zipFilePath, string targetDirPath)
	{
		bool isSuccess = false;
		try
		{
			using (ZipFile zip = new ZipFile(zipFilePath))
			{
				zip.ExtractProgress += zip_ExtractProgress;
				zip.ExtractAll(targetDirPath, ExtractExistingFileAction.OverwriteSilently);
			}

			if (!Directory.Exists(targetDirPath))
			{
				isSuccess = false;
			}
		}
		catch (Exception ex)
		{
			isSuccess = false;
		}

		return isSuccess;
	}

	#endregion Public Methods

	#region Private Methods

	private void zip_ExtractProgress(object sender, ExtractProgressEventArgs e)
	{
		if (Unzipping != null)
		{
			Unzipping((int)((double)e.BytesTransferred / ((double)e.TotalBytesToTransfer + 1) * 100));
		}
	}

	private void zip_SaveProgress(object sender, SaveProgressEventArgs e)
	{
		if (e.EventType == ZipProgressEventType.Saving_Started)
		{
			//MessageBox.Show("Begin Saving: " + e.ArchiveName);
		}
		else if (e.EventType == ZipProgressEventType.Saving_BeforeWriteEntry)
		{
			//labelCompressionStatus.Text = "Writing: " + e.CurrentEntry.FileName + " (" + (e.EntriesSaved + 1) + "/" + e.EntriesTotal + ")";
			//labelFilename.Text = "Filename:" + e.CurrentEntry.LocalFileName;

			//progressBar2.Maximum = e.EntriesTotal;
			//progressBar2.Value = e.EntriesSaved + 1;
			
			if (ZippingListProgress != null)
			{
				ZippingListProgress(e.EntriesTotal, e.EntriesSaved + 1);
			}
		}
		else if (e.EventType == ZipProgressEventType.Saving_EntryBytesRead)
		{
			//progressBar1.Value = (int)((e.BytesTransferred * 100) / e.TotalBytesToTransfer);
		}
		else if (e.EventType == ZipProgressEventType.Saving_Completed)
		{
			//MessageBox.Show("Done: " + e.ArchiveName);
			if (ZippingDone != null)
			{
				ZippingDone();
			}
		}

		if (ZippingFileProgress != null)
		{
			int progress = 0;
			
			//progress = (int)((double)e.BytesTransferred / ((double)e.TotalBytesToTransfer + 1) * 100);

			if (e.TotalBytesToTransfer > 0)
			{
				progress = (int)((e.BytesTransferred * 100) / e.TotalBytesToTransfer);
			}

			ZippingFileProgress(progress);

			
		}
	}

	#endregion Private Methods
}