ASP - Core Migrate EF Core SQL DB on Startup

Question

Is it possible to have my ASP Core Web API ensure the DB is migrated to the latest migration using EF Core? I know this can be done through the command line, but I want to

Answer 1

Starting .NET Core 2 using C# 7.1, you can have an asynchronous Main method to your app, so you can call all initialization logic before you run the host, right after it has finished building:

public class Program
{
  public static async Task Main(string[] args)
  {
    //first build
    var host = CreateHostBuilder(args).Build();

    //initialize
    using (var serviceScope = host.Services.CreateScope())
    {
      var serviceProvider = serviceScope.ServiceProvider;
      var isDevelopment = 
        serviceProvider.GetRequiredService().IsDevelopment();

      using var context = serviceProvider.GetRequiredService();


      if (isDevelopment)
        await context.Database.EnsureCreatedAsync();
      else
        await context.Database.MigrateAsync();

      if (isDevelopment)
      {
        using var userManager = 
          serviceProvider.GetRequiredService>();
        await userManager
          .CreateAsync(new AppUser { UserName = "dummy", Email = "dummy@dumail.com" },
          password: "1234");
      }
    }

    //now run
    host.Run();
  }

  public static IHostBuilder CreateHostBuilder(string[] args) =>
    Host.CreateDefaultBuilder(args)
      .ConfigureWebHostDefaults(webBuilder =>
      {
        webBuilder.UseStartup();
      });
}