Unzip Folder Contents In Windows Runtime Apps

Here are the steps, 

Step 1 - Create a simple Windows Project. Click New Project, Visual C#, Windows 8, Windows, then select Blank App (Windows 8.1).

Here you can go through my previous article: Zip Folder and Its Content in Windows Runtime Apps. 



Step 2 - Let us add a button in MainPage.xaml :

• A button with the Click event.
  
  Complete MainPage.xaml:
  

  <Page
      x:Class="UnZip.MainPage"
      xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
      xmlns:local="using:UnZip"
      xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
      xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
      mc:Ignorable="d">
  
      <Grid Background="#FF2077D4">
          <Button x:Name="btn_Unzip" Content="Unzip" HorizontalAlignment="Left" Margin="351,270,0,0" VerticalAlignment="Top" Height="83" Width="313" Click="btn_Unzip_Click"/>
      </Grid>
  </Page>

Step 3 - Let  us add a zip file in Assets folder of Solution Explorer. Unzip the contents of the zip folder and save all the files in application local folder.

Note: Make sure the Build Action is set to Content in the Properties of your zip file.



Step 4 - In the code behind: MainPage.xaml.cs,

Update your code with this:

using System;
using System.Collections.Generic;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.ApplicationModel;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Storage;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;

namespace UnZip
{
    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            this.InitializeComponent();
        }

        private async void btn_Unzip_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                StorageFolder appFolder = ApplicationData.Current.LocalFolder;
                var zipFile = await Package.Current.InstalledLocation.GetFileAsync("Assets\\TestZip.zip");
                using (var zipFileStream = await zipFile.OpenStreamForReadAsync())
                {
                    using (MemoryStream memoryStream = new MemoryStream((int)zipFileStream.Length))
                    {
                        await zipFileStream.CopyToAsync(memoryStream);

                        using (var zipArchive = new ZipArchive(memoryStream, ZipArchiveMode.Read))
                        {
                            foreach (ZipArchiveEntry zipArchiveEntry in zipArchive.Entries)
                            {
                                string[] arrayFolder = zipArchiveEntry.FullName.Split(new string[] { "/" }, StringSplitOptions.None);
                                string folderName = string.Empty;

                                for (int i = 0; i < arrayFolder.Length - 1; i++)
                                {
                                    folderName += "\\" + arrayFolder[i];
                                }

                                if (zipArchiveEntry.Name != "")
                                {
                                    using (Stream fileData = zipArchiveEntry.Open())
                                    {
                                        StorageFile outputFile = await appFolder.CreateFileAsync(folderName + "\\" + zipArchiveEntry.Name, CreationCollisionOption.ReplaceExisting);
                                        using (Stream outputFileStream = await outputFile.OpenStreamForWriteAsync())
                                        {
                                            await fileData.CopyToAsync(outputFileStream);
                                            await outputFileStream.FlushAsync();
                                        }
                                    }
                                }
                                else
                                {
                                    await appFolder.CreateFolderAsync(folderName, CreationCollisionOption.ReplaceExisting);
                                }
                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
            }
        }
    }
}

Step 5 - Run the application and click the Unzip button. You see the extracted content of zip file inside: This PC, C, Users, [Your User Name] > AppData, Local, Packages, [App package name], then go to LocalState,



That’s it.

You can also get the complete project from GitHub.