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Exploring Entity Framework Core 2.0: Demos, Features, and Roadmap

Dive into Entity Framework Core 2.0 with demos showcasing DbContext pooling, compiled queries, and function mapping. Learn about new features like query filters, owned entities, and table splitting. Understand the EF roadmap from version 1.0 to 2.1.

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Exploring Entity Framework Core 2.0: Demos, Features, and Roadmap

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  1. Entity Framework Core 2.0 Diego Vega, Andrew Peters @divega, @anpete

  2. About today’s session • EF versions & flavors • EF Core 2.0 • Demos • Roadmap

  3. Entity Framework versions & flavors Entity Framework O/R Mapper for .NET Framework Entity Framework Core Lightweight, extensible, cross-platform O/R Mapper for .NET Standard EF 6.2 (released last week) EF Core 2.1 (first half of 2018) EF 6.0 – 6.1.3 (2013 – 2015) EF Core 2.0 (2017) EF 4.1 to 5.0 (2011 – 2012) EF Core 1.0 – 1.1 (2016) EF 4.0 (2010) EF 1.0 (2008)

  4. Performance DbContext pooling Compiled queries Architecture improvements Entity Framework Core 2.0 Themes • Runs everywhere • .NET Standard 2.0 • New features • Query filters • Function mapping • Owned entities • Table splitting

  5. EF Core 2.0 - Compiled Queries Demo

  6. EF Core 2.0 – DbContext pooling Demo

  7. DbContext per Request publicclassBlogsController : Controller { privateBlogContext _context; publicBlogsController(BlogContext context) { _context = context; } publicIActionResult Index() { return _context.Blogs.ToList(); } } DI Container Request: /blogs/index Request: /blogs/index BlogContext Blogs Controller BlogContext Blogs Controller Scope Scope Request: /blogs/index BlogContext Blogs Controller Scope

  8. DbContext Pooling publicclassBlogsController : Controller { privateBlogContext _context; publicBlogsController(BlogContext context) { _context = context; } publicIActionResult Index() { return _context.Blogs.ToList(); } } DI Container Request: /blogs/index Context Pool Scope BlogContext Blogs Controller Scope BlogContext BlogContext BlogContext BlogContext Request: /blogs/index BlogContext BlogContext Blogs Controller Scope Request: /blogs/index BlogContext Blogs Controller Scope

  9. EF Core 2.0 - Query Filters Demo

  10. EF Core 2.0 - Owned Types & Table Splitting Demo

  11. EF Core 2.0 - Function Mapping Demo

  12. EF Core 2.0 – EF.Functions.Like() Demo

  13. EF Core 2.0 - String Interpolation on raw SQL Demo

  14. Lazy loading Value conversions Lifecycle events Non-default constructors Update model from database Column ordering Perf investigation UWP testing EF Core 2.1 – Planned Features • GroupBy • Seeding • View types • Include for derived types • System.Transactions • Cosmos DB provider • Sample Oracle provider • App insights integration

  15. EF Core 2.1 – View types Demo

  16. EF Core 2.1 – Data seeding Demo

  17. EF Core 2.1 – Value convertes and GroupBy translation Demo

  18. References • Demos https://github.com/anpete/efdemos • Project https://github.com/aspnet/EntityFrameworkCore • EF Core docs https://docs.microsoft.com/ef/core • Twitter @divega @anpete @efmagicunicorns • Blog https://blogs.msdn.microsoft.com/dotnet/

  19. Please use EventsXD to fill out a session evaluation. Thank you! Questions?

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