WP7 - Download zip file, unzip and save to isolated storage

1. Create New "Windows Phone Application".
2. Download "Silverlight SharpZipLib" from http://slsharpziplib.codeplex.com/releases/view/50561.
3. Unpack "Silverlight SharpZipLib" and copy Bin/Release/SharpZipLib.WindowsPhone7.dll
4. Create new folder "SharpZip" and past into copied SharpZipLib.WindowsPhone7.dll.
5. Right click on project and "Add Reference...".
6. Choose from "Browse" tab SharpZipLib.WindowsPhone7.dll from your project location.
7. Add to "MainPage.xaml.cs" (probably you need to remove "using System.Windows.Shapes" because conflict System.Windows.Shapes.Path vs System.IO.Path):
   

   using System.IO;
   using System.IO.IsolatedStorage;
   using ICSharpCode.SharpZipLib.Zip;
   using ICSharpCode.SharpZipLib.Zip.Compression.Streams;
   

8. Add code for download file from web:
   

   public MainPage()
   {
       InitializeComponent();
   
       Loaded += new RoutedEventHandler(MainPage_Loaded);
   }
   
   void MainPage_Loaded(object sender, RoutedEventArgs e)
   {
       System.Uri targetUri = new System.Uri("http://MyDomain/Archive.zip");
       HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(targetUri);
       //create asynchronous tast and declare callback to get data stream
       request.BeginGetResponse(new AsyncCallback(ReadWebRequestCallback), request);
   }
   

9. And add function "ReadWebRequestCallback" to unzip & save file we got:
   

   private void ReadWebRequestCallback(IAsyncResult callbackResult)
   {
       HttpWebRequest myRequest = (HttpWebRequest)callbackResult.AsyncState;
       HttpWebResponse myResponse = (HttpWebResponse)myRequest.EndGetResponse(callbackResult);
       using (StreamReader httpwebStreamReader = new StreamReader(myResponse.GetResponseStream()))
       {
           //open isolated storage to save files
           using (IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication())
           {
               using (ZipInputStream s = new ZipInputStream(httpwebStreamReader.BaseStream))
               {
                   //s.Password = "123456";//if archive is encrypted
                   ZipEntry theEntry;
                   try
                   {
                       while ((theEntry = s.GetNextEntry()) != null)
                       {
                           string directoryName = Path.GetDirectoryName(theEntry.Name);
                           string fileName = Path.GetFileName(theEntry.Name);
   
                           // create directory
                           if (directoryName.Length > 0)
                           {
                               Directory.CreateDirectory(directoryName);
                           }
   
                           if (fileName != String.Empty)
                           {
                               //save file to isolated storage
                               using (BinaryWriter streamWriter = 
                                       new BinaryWriter(new IsolatedStorageFileStream(theEntry.Name,
                                           FileMode.OpenOrCreate, FileAccess.Write, FileShare.Write, isoStore)))
                               {
   
                                   int size = 2048;
                                   byte[] data = new byte[2048];
                                   while (true)
                                   {
                                       size = s.Read(data, 0, data.Length);
                                       if (size > 0)
                                       {
                                           streamWriter.Write(data, 0, size);
                                       }
                                       else
                                       {
                                           break;
                                       }
                                   }
                               }
   
                           }
                       }
                   }
                   catch (ZipException ze)
                   {
                       Debug.WriteLine(ze.Message);
                   }
               }
           }
   
       }
   }
   

10. 
    Run your application and enjoy.