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

Assuming you are using the built-in DI container, here is one way you can accomplish this.

Reference your seed method in the Configure method of your startup class, and pass the IApplicationBuilder object as a parameter instead of the DbContext, like this:

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
    //...
    // Put this at the end of your configure method
    DbContextSeedData.Seed(app);
}

Next, modify your seed method to accept the IApplicationBuilder instance. Then you'll be able to spin up an instance of the DbContext, and perform your seed operation, like this:

public static void Seed(IApplicationBuilder app)
{
    // Get an instance of the DbContext from the DI container
    using (var context = app.ApplicationServices.GetRequiredService())
    {
        // perform database delete
        context.Database.EnsureDeleted;
        //... perform other seed operations
    }
}