ASP.NET Core RC2 Seed Database

Question

My problem is i am trying to seed an Entity Framework Core database with data and in my mind the below code show work. I\'ve realised that this should not be called in the <

Answer 1

You could also use from the Startup.cs ConfigureServices method to make your ApplicationDbContext available (Registering the dbcontext as a service):

public void ConfigureServices(IServiceCollection services)
{
   var connectionString = Startup.Configuration["connectionStrings:DBConnectionString"];//this line is not that relevant, the most important thing is registering the DbContext
            services.AddDbContext(o => o.UseSqlServer(connectionString));
}

and then add your ApplicationDbContext as dependency in your Configure method which will call your seed extension method.

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory, ApplicationDbContext myApplicationDbContext)
{
    //...
    myApplicationDbContext.Seed();
}

Finally the seed method could do a quick check on an important table, because perhaps recreating the db is too heavy:

public void Seed()
{
 //....      
 if(context.Countries.Any())
   return;
 //...
}

I hope it helps you or someone else, at least as another option.