Databases for Windows Phone

LINQ to SQL onWindows PhoneChris Koenigchris.koenig@microsoft.com | @chriskoenig | http://chriskoenig.netNorthwest Arkansas .NET User Group – January 2012

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 2 Windows Phone

http://aka.ms/wpsdk

http://aka.ms/databaseformango http://aka.ms/WP7Resources

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 5 Windows Phone

Local Data Storage: OverviewApps store private data in Isolated Storage Settings and properties in the app dictionary App Root Folder Unstructured data in Isolated Storage files Structured data in database files Install Creates root folder Package Manager sandboxed to App Database file (r/o) App Data Folder Creates/manages App files and settings WP7 Isolated Storage APIs Application Application Settings file files Database file 6 Windows Phone

Inserts/Updates/Deletes Actions made on the objects and collections Your app code  Create new objects  Add objects to collections Managed by the DataContext Name Yellow Tail Name Little Penguin Varietal Pinot Noir Varietal Pinot Noir  Changes made against the DataContext first AtHome True AtHome True False  Changes persisted by calling SubmitChanges() SubmitChanges  LINQ to SQL determines change set and submits to DB

Creating a databaseCRUD operationsDemo

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 9 Windows Phone

Isolated Storage Toolc:Program FilesMicrosoft SDKsWindows Phonev7.1ToolsIsolatedStorageExplorerTool <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 10 Windows Phone

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 11 Windows Phone

DatabaseSchemaUpdaterMake schema changes to existing databases AddTable<T>() var updater = db.CreateDatabaseSchemaUpdater(); AddColumn<T>() if (updater.DatabaseSchemaVersion < 2) { AddIndex<T>() updater.AddTable<History>(); updater.AddColumn<Widget>("CreationDate"); AddAssociation<T>() updater.DatabaseSchemaVersion = 2; updater.Execute(); DatabaseSchemaVersion } Make sure that your new Model classes are already created, and then supply them to the DatabaseSchemaUpdater 12 Windows Phone

Updating your databaseDemo

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 var db = new MyDataContext("Data Source=appdata:/ReferenceDB.sdf;File Mode=read only;"); Copy to Isolated Storage to use as a read-write database 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); } } 14 Windows Phone

Deploying a database with your appDemo

Agenda Overview of Windows Phone database support Creating and interrogating a database Updating your database with your applications Deploying a reference database with your app16 Windows Phone

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!17 Windows Phone

Chris Koenig chris.koenig@microsoft.comQ&A http://chriskoenig.net @chriskoenig 214-385-5616

The information herein is for informational purposes only and represents the current view of Microsoft Corporation as of the date of this presentation. Because Microsoft must respond to changing market conditions, it should not be interpreted to be a commitment on the part of Microsoft, and Microsoft cannot guarantee the accuracy of any information provided after the date of this presentation. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.© 2011 Microsoft Corporation.All rights reserved. Microsoft, Windows, Windows Vista and other product names are or may be registered trademarks and/or trademarks in the U.S. and/or other countries.

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Databases for Windows Phone

by Chris Koenig on Oct 07, 2011

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Databases for Windows Phone — Presentation Transcript