Databases for Windows Phone

LINQ to SQL on Windows Phone Chris [email protected] | @chriskoenig | http://chriskoenig.netNorthwest Arkansas .NET User Group – January 2012

Windows Phone2

Agenda

Overview of Windows Phone database support

Creating and interrogating a database

Updating your database with your applications

Deploying a reference database with your app

http://aka.ms/wpsdk

http://aka.ms/databaseformango

http://aka.ms/WP7Resources

Windows Phone5

SQL Server on Windows Phone Basedon SQL Server Compact Edition 3.5 Runtime is distributed with the operating

system Interaction managed through LINQ to SQL’s

code-first model Create classes that represent tables Annotate classes and fields/properties

with[Table] and [Column] attributes

Create a custom DataContext object to manage interactions

Automatic conversion of datatypes Properties are available

Encrypt the database using a password on the connection string

Windows Phone6

Local Data Storage: OverviewApps store private data in Isolated Storage

Settings and properties in the app dictionaryUnstructured data in Isolated Storage files Structured data in database files

ApplicationSettings file

AppCreates/managesfiles and settings

Applicationfiles

App Data Folder

Package Manager

App Root Folder

WP7 Isolated Storage APIs

Install

DBDatabase file

Databasefile (r/o)

Creates root folder

sandboxed to App

DB

DB

DataContextName Little

Penguin

Varietal Pinot Noir

AtHome True

Inserts/Updates/Deletes Actions made on the objects and

collections Create new objects Add objects to collections

Managed by the DataContext Changes made against

the DataContext first Changes persisted

by calling SubmitChanges() SubmitChanges

LINQ to SQL determines change set and submits to DB

Name Little Penguin

Varietal Pinot Noir

AtHome False

Your app code

Name Yellow Tail

Varietal Pinot Noir

AtHome True

Demo

Creating a databaseCRUD operations

Windows Phone9

Updating an existing database

Start with a good schema Buddy-project? Get a copy from the Isolated Storage Tool

Make updates to your Model classes Keep track of ALL the changes to your model so you know how

to “add” them later Update the schema at Runtime

Use the DatabaseSchemaUpdater to push changes into the database

Check new version against current version to determine upgrade path

Windows Phone10

Isolated Storage Toolc:\Program Files\Microsoft SDKs\Windows Phone\v7.1\Tools\IsolatedStorageExplorerTool <ts|rs|dir[:device-folder]>

ts = Take Snapshot rs = Restore Snapshot dir = show directory contents (optional path can be supplied)

<xd|de> xd = run on the emulator de = run on the device

<Product GUID> GUID taken from the WMAppManifest.xml

[<desktop-path>] Optional – desktop path for download and upload

Windows Phone11

IsoStoreSpy Graphical tool for browsing the

Isolated Storage areas on the Phone Device and Emulator

Open Source project on CodePlex

http://isostorespy.codeplex.com/

Multiple file formats supported Text Files Images Multimedia Ringtones SQL CE Databases

Windows Phone12

DatabaseSchemaUpdaterMake schema changes to existing databases

AddTable<T>() AddColumn<T>() AddIndex<T>() AddAssociation<T>() DatabaseSchemaVersio

nMake sure that your new Model classes are already created, and then supply them to the DatabaseSchemaUpdater

var updater = db.CreateDatabaseSchemaUpdater(); if (updater.DatabaseSchemaVersion < 2){   updater.AddTable<History>();   updater.AddColumn<Widget>("CreationDate"); updater.DatabaseSchemaVersion = 2;   updater.Execute();}

Demo

Updating your database

Windows Phone14

Deploying a database with your application Use a Buddy Project to create the initial SDF Add the database to your phone project

Set properties as Content, with the “Copy Always” option Use as a read-only database

Copy to Isolated Storage to use as a read-write database

var db = new MyDataContext("Data Source='appdata:/ReferenceDB.sdf';File Mode=read only;");

IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication(); Uri uri = new Uri("ReferenceDB.sdf", UriKind.Relative); using (Stream input = Application.GetResourceStream(uri).Stream)     using (IsolatedStorageFileStream output = iso.CreateFile(“ApplicationDB.sdf")) {        byte[] readBuffer = new byte[4096];    int bytesRead = -1;    while ((bytesRead = input.Read(readBuffer, 0, readBuffer.Length)) > 0) {        output.Write(readBuffer, 0, bytesRead); }}

Demo

Deploying a database with your app

Windows Phone16

Agenda

Overview of Windows Phone database support

Creating and interrogating a database

Updating your database with your applications

Deploying a reference database with your app

Windows Phone17

Call to Action

Download the tools from http://aka.ms/wp7sdk Download the Starter Kits from

http://code.msdn.microsoft.com Register for AppHub at http://create.msdn.com Have fun getting rich building apps for Windows

Phone!

Chris [email protected]://chriskoenig.net@chriskoenig214-385-5616

Q&A

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