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All about data persistence in Windows 8
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All about data persistence in Windows 8


Learn how to access and manipulate files on local and removable drives, how to roam settings between devices and how to store data in the cloud. …

Learn how to access and manipulate files on local and removable drives, how to roam settings between devices and how to store data in the cloud.

To learn more about Windows 8 data storage visit

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  • 1. All about datapersistence in Windows8Andrei Marukovichcontact@lunarfrog.comtwitter: @amarukovich
  • 2. Windows Runtime Desktop applications Windows Store appsWPF SL HTML DX HTML5 XAML DirectXC# / VB JavaScript JavaScript C# / VB C++ C++ .NET IE IE Engine .NET Windows Runtime Services and APIs Storage Sensors Media Win32 APIs Metadata UI XAML Controls Network …
  • 3. Windows RuntimeSandboxed environment• No direct communications between the apps• Brokered access to system resourcesFile system direct access• Local data• Temporary data• Installation folder• Downloads
  • 4. .NET FrameworkWindows Store profile• Subset of client profile .NET framework• No File / FileInfo• No Directory / DirectoryInfo
  • 5. File system entitiesFile system items• StorageFolder• StorageFileHelper classes• PathIO• FileIO
  • 6. Demo: Local data• Windows.Storage.ApplicationData • Folders • Settings• StorageFolder, StorageFile• PathIO, FileIO• ms-appx:///, ms-appdata:///local|temp|roaming/
  • 7. RoamingRoamingFolderRoamingSettings SkyDrive
  • 8. Roaming APIvar roamingFolder = ApplicationData.Current.RoamingFolder;StorageFile file = await roamingFolder.CreateFileAsync("dataFile.txt");await FileIO.WriteTextAsync(file, “some text");ulong quota = ApplicationData.RoamingStorageQuota;ApplicationData.DataChanged += DataChangedHandler;
  • 9. Roaming• Files• SettingsDO• Small data set synchronization between devicesDON’T• Real-time communication
  • 10. LibrariesWindows.Storage.KnownFolders• PicturesLibrary• MusicLibrary• VideosLibrary• DocumentsLibrary• HomeGroup• RemovableDevices
  • 11. Demo: Libraries• Libraries• App Manifest• Windows Property System
  • 12. Demo: Pickers• FolderPicker, FilePicker• AccessCache• Picker Contract
  • 13. Files and settingsApplication data• Local/Roaming folder and settingsUser data• LibrariesOther folders and files• Pickers
  • 14. DatabasesCurrent state• No System.DataOptions• SQLite• ESENT• Azure Mobile Servces• Web/Cloud services of you choice
  • 15. SQLite• SQLite for Windows Runtime extension• Managed SQLlite library, e.g. sqlite-netusing (var db = new SQLite.SQLiteConnection(dbPath)){ db.CreateTable<City>(); db.RunInTransaction(() => { db.Insert(new City() { Name = "Toronto" }); });}
  • 16. ESENTExtensible Storage Engine• Indexed sequential access data storage• Used by Windows 8 Zune Music and VideoManaged wrapper• ManagedEsent.codeplex.comOverview
  • 17. Demo: Azure Mobile Services
  • 18. App-to-app data sharingShare Contract• Text• HTML• URI• Bitmap• File• Custom data • formats •
  • 19. DataLocal storages• XML, SQLite, ESENT, etc.Cloud storages• SkyDrive, Azure Mobile Services, custom services
  • 20. Thank you!Andrei Marukovichcontact@lunarfrog.comtwitter: @amarukovich