ZipUtil.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using log4net;

public class ZipUtil : IZip
{
    private static readonly ILog Log = LogManager.GetLogger(typeof(ZipModule));
    private string _zipFileName;
    private List<string> _files;

    public void SetZipFileName(string zipfileName)
    {
        _zipFileName = zipfileName;
    }

    public void SetFilesToZip(List<string> files)
    {
        _files = files;
    }

    public void CreateArchive()
    {
        try
        {
            if (!DoAnyFilesInFileListExist())
            {
                Log.DebugFormat("No Files to send");
                return;
            }

            using (var zipFile = ZipFile.Open(_zipFileName, ZipArchiveMode.Create))
            {
                foreach (var file in _files)
                {
                        AddToZip(zipFile, file);
                }
            }
        }
        catch (System.IO.DirectoryNotFoundException e)
        {
            Log.ErrorFormat("ZIP not created as directory doesn't exist: {0}.", e.Message);
        }
        catch (Exception e)
        {
            Log.ErrorFormat("ZIP not created: {0}.", e.Message);
        }
    }

    private bool DoAnyFilesInFileListExist()
    {
        foreach (var fileName in _files)
        {
            if (File.Exists(fileName))
            {
                return true;
            }
        }

        return false;
    }

    private void AddToZip(ZipArchive zipFile, string fileName)
    {
        if (!File.Exists(fileName))
        {
            Log.ErrorFormat("File not added to ZIP as doesn't exist: {0}.", fileName);
            return;
        }

        Log.DebugFormat("File added to zip: {0}", fileName);
        zipFile.CreateEntryFromFile(fileName, Path.GetFileName(fileName), CompressionLevel.Optimal);
        File.Delete(fileName);
    }
}