ASP.NET 5 Console Application (package) - How to create DBContext from connection string?

Question

I'm trying to create DBContext from connection string on .net core. This used to work with .net 4.5:

public class MyContext : DbContext
{
   internal MYContext(string connectionString) : base(connectionString){}
}

Now I'm getting error that the base class (DBContext) doesn't have constructor that accepts string.

Any ideas?

Answer 1

DbContext doesn't have this constructor anymore. You can specify the connection string in OnConfiguring method overload:

public class BloggingContext : DbContext
{
    public DbSet<Blog> Blogs { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {         
        optionsBuilder.UseSqlServer(@"Server=(localdb)\mssqllocaldb;Database=EFGetStarted.ConsoleApp.NewDb;Trusted_Connection=True;");

    }
}

https://ef.readthedocs.org/en/latest/getting-started/full-dotnet/new-db.html

UseSqlServer is an extension method for DbContextOptionsBuilder