All about data persistence in Windows 8

All about data persistence in Windows 8

Andrei [email protected]: @amarukovich

Windows Runtime

Win32 APIs

IE.NET

C# / VB

JavaScript C++

WPF

SL DXHTM

L

Desktop applications

Windows Runtime Services and APIs

Metadata

StorageSensor

s Media

UI XAMLControl

sNetwor

k…

IE EngineC++

.NET

JavaScript

C# / VB

HTML5Direct

XXAML

Windows Store apps

Windows Runtime

Sandboxed environment• No direct communications between the apps• Brokered access to system resources

File system direct access• Local data• Temporary data• Installation folder• Downloads

.NET Framework

Windows Store profile• Subset of client profile .NET framework• No File / FileInfo• No Directory / DirectoryInfo

File system entities

File system items• StorageFolder• StorageFile

Helper classes• PathIO• FileIO

Demo: Local data

• Windows.Storage.ApplicationData

• Folders

• Settings

• StorageFolder, StorageFile

• PathIO, FileIO

• ms-appx:///, ms-appdata:///local|temp|roaming/

Roaming

SkyDrive

RoamingFolderRoamingSettings

Roaming API

var roamingFolder = ApplicationData.Current.RoamingFolder;

StorageFile file = await roamingFolder.CreateFileAsync("dataFile.txt");

await FileIO.WriteTextAsync(file, “some text");

ulong quota = ApplicationData.RoamingStorageQuota;

ApplicationData.DataChanged += DataChangedHandler;

Roaming

• Files

• Settings

DO

• Small data set synchronization between devices

DON’T

• Real-time communication

Libraries

Windows.Storage.KnownFolders• PicturesLibrary• MusicLibrary• VideosLibrary• DocumentsLibrary• HomeGroup• RemovableDevices

Demo: Libraries

• Libraries

• App Manifest

• Windows Property System

Demo: Pickers

• FolderPicker, FilePicker

• AccessCache

• Picker Contract

Files and settings

Application data• Local/Roaming folder and settings

User data• Libraries

Other folders and files• Pickers

Databases

Current state• No System.Data

Options• SQLite• ESENT• Azure Mobile Servces• Web/Cloud services of you choice

SQLite

using (var db = new SQLite.SQLiteConnection(dbPath))

{

db.CreateTable<City>();

db.RunInTransaction(() =>

{

db.Insert(new City() { Name = "Toronto" });

});

}

• SQLite for Windows Runtime extension• Managed SQLlite library, e.g. sqlite-net

ESENT

Extensible Storage Engine• Indexed sequential access data storage• Used by Windows 8 Zune Music and

Video

Managed wrapper• ManagedEsent.codeplex.com

Overviewhttp://lunarfrog.com/blog/2012/09/23/extensible-storage-engine/

Demo: Azure Mobile Services

https://manage.windowsazure.com/

App-to-app data sharing

Share Contract• Text• HTML• URI• Bitmap• File• Custom data • schema.org formats• https://

github.com/AndreiMarukovich/Transhipment

Data

Local storages• XML, SQLite, ESENT, etc.

Cloud storages• SkyDrive, Azure Mobile Services, custom

services

Thank you!

Andrei [email protected]: @amarukovich