EF Core RC2 demos from NDC Oslo 2016

1. Ido Flatow
Entity Framework Core (EF Core) 1.0
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About Me
Senior Architect, Sela Group
Microsoft Regional Director, and an ASP.NET/IIS MVP
Co-author of courses and books
Focus on server, web, and cloud

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Entity Framework Project Status
New runtime components on NuGet
Core runtime components in .NET
Tooling in Visual Studio
Runtime in .NET Framework
Tooling in Visual Studio
Runtime on NuGet
Tooling on Microsoft Download Center
Latest version included in Visual Studio

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Today
Written to target relational databases
EF6.x DLL files are over 5MB
Runs only on full .NET Framework
No support for batch updates

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EF Core Key Features
Rewritten from the ground up to be lightweight (under 1MB)
New platforms & data stores
IoC friendly and extensible
Optimized query generation
Code-First only
Batching

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.NET FRAMEWORK .NET CORE XAMARIN
APP
MODELS
BASE
LIBRARIES
New Platforms

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New Data Stores
Relational & non-relational
Not a magic abstraction
High level services that are useful on all/most stores
Non-common concerns handled by provider extensions
Example providers
Relational (SQL Server, SQLite, Postgres, SQL Compact etc.)
In Memory (for testing)
Azure Table Storage
Redis cache
Just relational providers for v1.0

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Lightweight & Extensible Core
Same top level experience as EF6.x
Still DbContext/DbSet etc.
New core
Core = metadata, change tracking, query pipeline, etc.
Built as a collection of services with dependency injection
Easier to replace/extend services
Replace confusing APIs & behavior
Optimized for memory and CPU usage
Pay-per-play components

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EF6.x – The End?!
Will continue to be a supported release
Microsoft will continue with bug fixes and small improvements to
the code base
First preview of EF6.2 will be available shortly after EF Core
reaches RTM

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Some New Features
Mixed C#/database eval in LINQ queries
Batch save
SQL query improvements
Shadow state properties
Alternate keys
TrackGraph API

11. Demo
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EF Core Basics

12. Demo
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LINQ and SQL Query Improvements

13. Demo
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Simplified Metadata API

14. Demo
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Extensible Core

15. Demo
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New Data Stores

16. Demo
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New Features

17. Demo
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New Platforms

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EF Core 1.0 Feature Status (condensed version)
Backlog
Lazy loading
Complex value types
Stored procedure mapping
Data seeding
Update model from database
Many-to-many relationships
without a join entity
Inheritance mapping with TPT and
TPC
Command interception
In Progress
Bug fixing
Performance improvements
LINQ improvements
Documentation and Intellisense
Thrown out
EDMX
Entity SQL
ObjectContext API

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EF Core & EF6.x
EF6.x will be the right choice for many applications
Carefully evaluate requirements if considering EF Core
Some important features not implemented in 1.0 (e.g. lazy loading,
stored procedure mapping, etc.)
Less mature code base (e.g. LINQ translator has limitations)
EF6.x to EF Core is “port” not “upgrade”
Very basic code will port easily
Many APIs have changed drastically
Beware of behavior differences in similarly named APIs

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When to Use EF Core?
New applications that do not need the features that are not yet
implemented in EF Core
Applications that target .NET Core, such as Universal Windows
Platform (UWP) and ASP.NET Core applications

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Next Steps
Documentation
docs.efproject.net
github.com/aspnet/EntityFramework/wiki/Roadmap
Repositories
github.com/aspnet/EntityFramework
github.com/rowanmiller/Demo-EFCore
Blogs
blogs.msdn.microsoft.com/dotnet
blogs.msdn.com/b/adonet (older)
My demo code
git.io/voYzr