Steve Maier@YsFred4, @ThoughtsPrayers, @YsApps, @AppRochesterhttp://strugglingthru.net/steve.maier@gmail.com

About mePrincipal Software Engineer at InfiMed, Inc (Varian Medical Systems)WPF, SQL Server 2005/2008, WCF, MFC, COM

Co-Founder of AppRochester Mobile device user group in Rochester, NYSpeaker in Buffalo, Rochester, Syracuse, and Boston

Hold 12 MS certificationsI have “drank the Microsoft koolaid” and enjoy it

Worked with, WPF, Silverlight, SQL Server (co-author), ASP.NET, MVC, Linq to SQL, EF, WCF, driver development, DirectX, XNA, and many more things.

11 apps in iOS store6 apps in Windows Phone store2 Android apps

OverviewAbout meEntity FrameworkCode FirstSQL CELocaldb

Entity FrameworkERM included in .NET 3.5 sp1Point EF to a database and have it generate classes

and relationships for youPrevious products like CodeSmith, nHibernate, etcDatabase First

EF 4.0 included with .NET 4.0fixed many bugs, added features like lazy loading

(Linq to SQL)EF 4.1 – online download, Package Manager

Adds Code FirstEF 4.3.1 current versionEF 5.0 beta

Adding migration -> versioning of databases

Database FirstCreate the database using scripts or SSMSPoint EF to an existing database

Generated an edmx file with the modelGreat for adding/converting existing

databases to a new ERM easilyUpdate the model from the database

Demo

Code FirstTakes the opposite approach

Start with the classes that you want to storeGenerate the databaseChanging the classes can regenerate the database

Migration in 4.3.1 and 5.0 is setup to handle updating the database better

Defaults to SQLExpress that is installed on the system4.3.1 will default to localdb if SQLExpress is not

installedAttributes or Fluent API

Demo

Code First Data Annotation (Attributes)KeyRequiredMaxLength / MinLengthNotMappedComplexTypeConcurrencyCheckTimeStampTable / ColumnDatabaseGeneratedInverseProperty / ForeignKeyErrorMessage – not really an annotation

SQL CESingle file, no server running – similar to AccessCE 3.5 and 4.0 are common versionsCan run on mobile devices (Windows CE 6,

Windows Phone 7.5)

localdbNew feature of SQL 2012Being installed with VS 2011 instead of SQL ExpressSame sqlserver.exe as SQLExpressNot launched as a service but launched as a child

process

SQL Ce vs LocalDbSQL CE LocalDb 2.5 MB download size

18 MB expanded on disk Single file Privately installed,

embedded, with the application

Non-admin installation option

Runs in-process with application

Database size support – 4G Code free, document safe,

file format Number of concurrent

connections - 256

32 MB download size > 160 MB on disk (TBD)

Multiple files Database size support – 10G Runs as process started by app Procedural T-SQL - Select

Case, If, features LINQ to SQL Distributed transactions Native XML, XQuery/XPath Stored procedures, views,

triggers Role-based security Number of concurrent

connections – unlimited but only local

Being bundled into VS 2011

• Transact-SQL - Common Query Features

• ADO.NET Entity Framework 4.1

Code First DEMOConverting a product with hardcoded values

to a database driven modelStarted developing with SQL CE for small

local databaseSimple table definitions

database