How to add an implementation of IDesignTimeDbContextFactory to add migration to .Net core 2.0 application?

Question

I am trying to run Add-Migration InitialCreate command from package manager console from a .NET Core 2.0 MVC application. After looking at all possible sources still not abl

Answer 1

Had the same issue. It happened after i updated Microsoft.AspNetCore.All from 2.0.0-preview2-final to 2.0.0. Guess the reason why it fails is that i have .NET Core Preview 2 runtime installed.

EFCore got updated too. So please, make sure you have same nuget and runtime versions

UPDATE: Now .NET Core runtime and SDK 2.0 released https://www.microsoft.com/net/download/core. After install you can safely update your packages to 2.0.0

Answer 2

You need change your class Program

public class Program
{
    public static void Main(string[] args)
    {
        BuildWebHost(args).Run();
    }

    public static IWebHost BuildWebHost(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>()
            .Build();
}

This class changed with dotnet core 2.0.0

Answer 3

I had the same issue

My solution contained a console application and an api application which contained the dbcontext code.

I had set the start up project to the console application. When I changed the start up project to the api application the error dissapeared.