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Entity Framework Core Entity Framework Core is the new version of Entity Framework after EF 6.x. It is open-source, lightweight, extensible and a cross-platform version of Entity Framework data access technology. Entity Framework is an Object/Relational Mapping (O/RM) framework. It is an enhancement to ADO.NET that gives developers an automated mechanism for accessing & storing the data in the database. EF Core is intended to be used with .NET Core applications. However, it can also be used with standard .NET 4.5+ framework based applications. The following figure illustrates the supported application types, .NET Frameworks and OSs. EF Core Version History EF Core Version Release Date EF Core 2.0 August 2017 EF Core 1.1 November 2016 EF Core 1.0 June 2016 EF Core on GitHub: https://github.com/aspnet/EntityFrameworkCore EF Core Roadmap: docs.microsoft.com/en-us/ef/core/what-is-new/roadmap Track EF Core's issues at https://github.com/aspnet/EntityFrameworkCore/issues EF Core Official Documentation: https://docs.microsoft.com/ef/core EF Core Development Approaches EF Core supports two development approaches 1) Code-First 2) Database-First. EF Core mainly targets the code-first approach and provides little support for the database-first approach because the visual designer or wizard for DB model is not supported as of EF Core 2.0. In the code-first approach, EF Core API creates the database and tables using migration based on the conventions and configuration provided in your domain classes. This approach is useful in Domain Driven Design (DDD). In the database-first approach, EF Core API creates the domain and context classes based on your existing database using EF Core commands. This has limited support in EF Core as it does not support visual designer or wizard. EF Core vs EF 6 Entity Framework Core is the new and improved version of Entity Framework for .NET Core applications. EF Core is new, so still not as mature as EF 6. EF Core continues to support the following features and concepts, same as EF 6. DbContext & DbSet Data Model Querying using Linq-to-Entities Change Tracking SaveChanges Migrations EF Core will include most of the features of EF 6 gradually. However, there are some features of EF 6 which are not supported in EF Core 2.0 such as: EDMX/ Graphical Visualization of Model Entity Data Model Wizard (for DB-First approach) ObjectContext API Querying using Entity SQL. Automated Migration Inheritance: Table per type (TPT) Inheritance: Table per concrete class (TPC) Many-to-Many without join entity Entity Splitting Spatial Data Lazy loading of related data Stored procedure mapping with DbContext for CUD operation Seed data Automatic migration EF Core includes the following new features which are not supported in EF 6.x: Easy relationship configuration Batch INSERT, UPDATE, and DELETE operations In-memory provider for testing Support for IoC (Inversion of Control) Unique constraints Shadow properties Alternate keys Global query filter Field mapping DbContext pooling Better patterns for handling disconnected entity graphs Learn more on EF Core and EF 6 differences at here. EF Core Database Providers Entity Framework Core uses a provider model to access many different databases. EF Core includes providers as NuGet packages which you need to install. The following table lists database providers and NuGet packages for EF Core. Database NuGet Package SQL Server Microsoft.EntityFrameworkCore.SqlServer MySQL MySql.Data.EntityFrameworkCore PostgreSQL Npgsql.EntityFrameworkCore.PostgreSQL SQLite Microsoft.EntityFrameworkCore.SQLite SQL Compact EntityFrameworkCore.SqlServerCompact40 In-memory Microsoft.EntityFrameworkCore.InMemory Source: "https://www.entityframeworktutorial.net/efcore/entity-framework-core.aspx"
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In this repository, you can find to Entity Framework Core code examples.
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