ZipUtility 1.1.5

internal partial class ZipUtilityTest : Form
{
    public ZipUtilityTest()
    {
        ZipViewer zipViewer = null;
        string unzipDst = Application.StartupPath;

        var statusStrip = new StatusStrip() { Parent = this, };
        var statusLabel = new ToolStripStatusLabel() { Text = "Ready", Spring = true, TextAlign = ContentAlignment.MiddleLeft, };
        statusStrip.Items.Add(statusLabel);
        Action<string> progress = (l) => { statusLabel.Text = l; };
        ListBox listBoxZipFiles = new ListBox() { Parent = this, Dock = DockStyle.Top, };
        listBoxZipFiles.ContextMenuStrip = new ContextMenuStrip();
        ToolStripMenuItem tsmiUnzip = new ToolStripMenuItem() { Text = "Unzip selected", };
        tsmiUnzip.Click += async (sender, e) =>
        {
            await zipViewer.Extract(unzipDst, listBoxZipFiles.SelectedItems.Cast<string>().ToList());
        };

        ToolStripMenuItem tsmiGlimpse = new ToolStripMenuItem() { Text = "Glimpse selected", };
        tsmiGlimpse.Click += (sender, e) => 
        {
            foreach(var item in listBoxZipFiles.SelectedItems.Cast<string>())
            {
                var d = zipViewer.GetData(item);
                var text = Encoding.UTF8.GetString(d);
                int len = Math.Min(200, text.Length);
                MessageBox.Show(text.Substring(0,len));
            }
        };

        listBoxZipFiles.ContextMenuStrip.Items.Add(tsmiUnzip);
        listBoxZipFiles.ContextMenuStrip.Items.Add(tsmiGlimpse);

        Button buttonDisp = new Button() { Text = "Display", Parent = this, Dock = DockStyle.Top, };
        buttonDisp.Click += async (sender, e) =>
        {
            OpenFileDialog ofd = new OpenFileDialog() { InitialDirectory = Application.StartupPath, };
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                zipViewer = await ZipViewer.Open(ofd.FileName, progress);
                if (zipViewer != null)
                {
                    listBoxZipFiles.Items.Clear();
                    listBoxZipFiles.Items.AddRange(zipViewer.FileList.Select(x => x.FileName).ToArray());
                }
            }
        };

        Button buttonExtract = new Button() { Text = "UnzipAll", Parent = this, Dock = DockStyle.Top, };
        buttonExtract.Click += async (sender, e) =>
        {
            OpenFileDialog ofd = new OpenFileDialog() { InitialDirectory = Application.StartupPath, };
            if (ofd.ShowDialog() == DialogResult.OK)
            {
                var tempdst = System.IO.Path.GetDirectoryName(ofd.FileName);
                var z = await ZipViewer.Open(ofd.FileName, progress);
                if (z != null)
                {
                    await z.ExtractAll(tempdst);
                }
            }
        };

        Button buttonZip = new Button() { Text = "CreateZip", Parent = this, Dock = DockStyle.Top, };
        buttonZip.Click += async (sender, e) =>
        {
            using (var streamzipper = new StreamZipper("streamzip.zip"))
            {
                OpenFileDialog ofd = new OpenFileDialog() { InitialDirectory = Application.StartupPath, Multiselect = true, };
                if (ofd.ShowDialog() == DialogResult.OK)
                {
                    foreach (var f in ofd.FileNames)
                    {
                        streamzipper.Add(f, System.IO.Path.GetFileName(f));
                        progress(f);
                        await Task.Delay(1);
                    }
                }

                FolderBrowserDialog fbd = new FolderBrowserDialog() { SelectedPath = Application.StartupPath, };
                if (fbd.ShowDialog() == DialogResult.OK)
                {
                    var startpos = System.IO.Path.GetDirectoryName(fbd.SelectedPath).Length;
                    foreach (var f in System.IO.Directory.GetFiles(fbd.SelectedPath, "*", System.IO.SearchOption.AllDirectories))
                    {
                        streamzipper.Add(f, f.Substring(startpos));
                        progress(f);
                        await Task.Delay(1);
                    }
                }

                streamzipper.Close();
                streamzipper.Dispose();
                progress("Ready");

            }
        };

        SizeChanged += (sende, e) =>
        {
            listBoxZipFiles.Height = ClientSize.Height - buttonDisp.Height - buttonExtract.Height - buttonZip.Height - statusStrip.Height;
        };
        StartPosition = FormStartPosition.CenterScreen;
        ClientSize = new Size(400, 600);
    }
}