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![Transactions
using (var scope = new TransactionScope(TransactionScopeOption.Required))
{
using (var conn = new SqlConnection("..."))
{
conn.Open();
var sqlCommand = new SqlCommand();
sqlCommand.Connection = conn;
sqlCommand.CommandText =
@"UPDATE Blogs SET Rating = 5" +
" WHERE Name LIKE '%Entity Framework%'";
sqlCommand.ExecuteNonQuery();
using (var context =
new BloggingContext(conn, contextOwnsConnection: false))
{
var query = context.Posts.Where(p => p.Blog.Rating > 5);
foreach (var post in query)
{
post.Title += "[Cool Blog]";
}
context.SaveChanges();
}
}
scope.Complete();
}](https://image.slidesharecdn.com/stateofentityframework-150303093338-conversion-gate01/75/State-of-entity-framework-9-2048.jpg)
Uploaded byDavid Paquette
State of entity framework
Entity Framework is an object-relational mapper for .NET. Entity Framework 6 introduced improvements like async querying and saving, connection resiliency, and improved transaction support. Entity Framework 7 is a rewrite that will support non-relational data stores and run on non-Windows platforms like Linux. It focuses on ASP.NET 5 for now but will have features like batch updates and simplified metadata. Entity Framework 6 remains recommended for most projects while Entity Framework 7 is optimized for ASP.NET 5.
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State of entity framework
- 1. The State ofEntity Framework David Paquette www.davepaquette.com @Dave_Paquette
- 2. Overview Background EntityFramework 6 What’s New? Demo – Profiling and Performance Tuning Entity Framework 7 What? – Where? – When? - Why?
- 3. Entity Framework AnObject Relational Mapper (ORM) for .NET EFv1 in .NET 3.5 SP1 / VS 2008 SP1 EFv4 in .NET 4 EFv4.1 – Code First (Magic Unicorn) EFv4.3 – Code First Migrations EFv5.0 – enum support, table valued functions, spacial data types, performance Improvements EFv6.0 – Lots of great stuff EFv7.0 – What the ?
- 4. Entity Framework 6 Async Query and Save Connection Resiliency Code-Based Configuration Interception / SQL Logging Ability to Reuse an open connection Custom Conventions Improved Transaction Support And Much Much More…
- 5. Flavours of EntityFramework Model First Design objects in the visual designer (generate the database scripts and the C# objects) Database First Start with an existing database (generate the model) Code First (Magic Unicorn) Create Plain Old CLR Objects (POCOs) first Database can be generated or can map to existing database There is no edmx file!
- 6. Sample App –Social Recipes A site for sharing your favorite recipes with your friends Create and join Groups Create, share, and review Recipes https://github.com/dpaquette/SocialRecipes
- 7. NuGet Packages Used PM>Install-Package EntityFramework PM> Install-Package Ninject.MVC3 PM> Install-Package MiniProfiler.EF6 PM> Install-Package MiniProfiler.MVC4
- 8. Connection Resiliency public classMyConfiguration : DbConfiguration { public MyConfiguration() { SetExecutionStrategy( "System.Data.SqlClient", () => new SqlAzureExecutionStrategy(1, TimeSpan.FromSeconds(30))); } }
- 9. Transactions using (var scope= new TransactionScope(TransactionScopeOption.Required)) { using (var conn = new SqlConnection("...")) { conn.Open(); var sqlCommand = new SqlCommand(); sqlCommand.Connection = conn; sqlCommand.CommandText = @"UPDATE Blogs SET Rating = 5" + " WHERE Name LIKE '%Entity Framework%'"; sqlCommand.ExecuteNonQuery(); using (var context = new BloggingContext(conn, contextOwnsConnection: false)) { var query = context.Posts.Where(p => p.Blog.Rating > 5); foreach (var post in query) { post.Title += "[Cool Blog]"; } context.SaveChanges(); } } scope.Complete(); }
- 10. Entity Framework 7 https://github.com/aspnet/EntityFramework Part of ASP.NET vNext (v5)
- 11. Yup, it’s are-write
- 12.
- 13. Familiar API using (vardb = new BloggingContext() { db.Blogs.Add( new Blog { Url = "blogs.msdn.com/adonet" }); db.SaveChanges(); var blogs = from b in db.Blogs.Include(b => b.Posts) orderby b.Name select b; foreach (var blog in blogs) { //… } }
- 14.
- 15. New Features WindowsStore Apps, .NET Core (Linux / OSx) Non-Relational Data Stores Azure Table Storage, Redis, DocumentDB, MongoDB, etc. Light-weight Relational Data Stores SQL Lite, In Memory
- 16. Batching ofUpdates!!!! Proper Unique Constraints Simplified Meta-Data Model More New Features using (var db = new BloggingContext()) { var tableName = db.Model.GetEntityType(typeof(Blog)).Relational().Table; }
- 17. Entity Framework 7– First Release Focus on ASP.NET 5 Not recommended for any other platform
- 18. Wrapping it up Entity Framework 6 is great Fast, Flexible and Well Understood Recommended for all non-ASP.NET 5 projects Entity Framework 7 will be great Support for non-relational stores Multi Platform Faster, More Flexible Only recommended for ASP.NET 5 projects
- 19. The State ofEntity Framework David Paquette www.davepaquette.com @Dave_Paquette
Editor's Notes
- #3 Overview of the session.