Need Help Migrating Activator.CreateInstances to .NET 6

Question

Code is as follows:

public async void Configure(IApplicationBuilder app,
            IWebHostEnvironment env)
        {
            await ActivatorUtilities.CreateInstance<DatabaseInitializer>
                (app.ApplicationServices).Initialize();
        }

Need help migrating it to .NET 6. Thank you!

Answer 1

As far as I know, the ActivatorUtilities.CreateInstance is supported inside asp.net 6.

You could directly use it inside the asp.net6 program.cs. ASP.NET6 unifies Startup.cs and Program.cs into a single Program.cs file.

As you mentioned, the app.ApplicationServices is not existed inside asp.net 6, we should use app.Services instead.

The code like below:

    var builder = WebApplication.CreateBuilder(args);

    // Add services to the container.
    builder.Services.AddControllersWithViews();

    var app = builder.Build();



    // Configure the HTTP request pipeline.
    if (!app.Environment.IsDevelopment())
    {
        app.UseExceptionHandler("/Home/Error");
        // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
        app.UseHsts();
    }

await ActivatorUtilities.CreateInstance<DatabaseInitializer>
             (app.Services).Initialize();

    app.UseHttpsRedirection();
    app.UseStaticFiles();

    //app.UseAuthentication();    
    app.UseRouting();

    //app.UseAuthorization();

    app.MapControllerRoute(
        name: "default",
        pattern: "{controller=Home}/{action=Index}/{id?}");

    app.Run();