This repository is home to the following .NET Foundation projects. These projects are maintained by Microsoft and licensed under the Apache License, Version 2.0.
EF Core is a modern object-database mapper for .NET. It supports LINQ queries, change tracking, updates, and schema migrations. EF Core works with SQL Server, Azure SQL Database, SQLite, Azure Cosmos DB, MySQL, PostgreSQL, and other databases through a provider plugin API.
EF Core is available on NuGet. Install the provider package corresponding to your target database. See the list of providers in the docs for additional databases.
dotnet add package Microsoft.EntityFrameworkCore.SqlServer
dotnet add package Microsoft.EntityFrameworkCore.Sqlite
dotnet add package Microsoft.EntityFrameworkCore.CosmosUse the --version option to specify a preview version to install.
We recommend using the daily builds to get the latest code and provide feedback on EF Core. These builds contain latest features and bug fixes; previews and official releases lag significantly behind.
The following code demonstrates basic usage of EF Core. For a full tutorial configuring the DbContext, defining the model, and creating the database, see getting started in the docs.
using (var db = new BloggingContext())
{
// Inserting data into the database
db.Add(new Blog { Url = "http://blogs.msdn.com/adonet" });
db.SaveChanges();
// Querying
var blog = db.Blogs
.OrderBy(b => b.BlogId)
.First();
// Updating
blog.Url = "https://devblogs.microsoft.com/dotnet";
blog.Posts.Add(
new Post
{
Title = "Hello World",
Content = "I wrote an app using EF Core!"
});
db.SaveChanges();
// Deleting
db.Remove(blog);
db.SaveChanges();
}
Microsoft.Data.Sqlite is a lightweight ADO.NET provider for SQLite. The EF Core provider for SQLite is built on top of this library. However, it can also be used independently or with other data access libraries.
The latest stable version is available on NuGet.
dotnet add package Microsoft.Data.SqliteUse the --version option to specify a preview version to install.
We recommend using the daily builds to get the latest code and provide feedback on Microsoft.Data.Sqlite. These builds contain latest features and bug fixes; previews and official releases lag significantly behind.
This library implements the common ADO.NET abstractions for connections, commands, data readers, and so on. For more information, see Microsoft.Data.Sqlite on Microsoft Docs.
using (var connection = new SqliteConnection("Data Source=Blogs.db"))
{
connection.Open();
var command = connection.CreateCommand();
command.CommandText = "SELECT Url FROM Blogs";
using (var reader = command.ExecuteReader())
{
while (reader.Read())
{
var url = reader.GetString(0);
}
}
}If you have a specific question about using these projects, we encourage you to ask it on Stack Overflow. If you encounter a bug or would like to request a feature, submit an issue. For more details, see getting support.
If you're interested in contributing to these projects, see contributing.