"ActiveItem" method missing in v4.0.105-alpha

[reiniellematt]

I am currently trying to use Caliburn.Micro with WPF in .NET Core 3.1. While creating a simple "single page" application wherein I only have one window (ShellView) and I will be using UserControls to be the pages.

Platform: Windows 10 Home 1909 64-bit

Steps on recreating the issue:

1. Create a new .NET Core 3.1 WPF project.
2. Add Caliburn.Micro pre-release into project.
3. Install Microsoft.Extensions.DependencyInjection, Microsoft.Extensions.Options.ConfigurationExtensions, and Microsoft.Extensions.Configuration.Json NuGet packages to be used as the DI for the project.
4. Setup App.xaml

   <Application x:Class="CaliburnDI.App"
            xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
            xmlns:local="clr-namespace:CaliburnDI">
   <Application.Resources>
       <ResourceDictionary>
           <ResourceDictionary.MergedDictionaries>
               <ResourceDictionary>
                   <local:Bootstrapper x:Key="Bootstrapper"/>
               </ResourceDictionary>
           </ResourceDictionary.MergedDictionaries>
       </ResourceDictionary>
   </Application.Resources>
   </Application>

5. Setup Bootstrapper.cs

   
   using Caliburn.Micro;
   using CaliburnDI.ViewModels;
   using Microsoft.Extensions.Configuration;
   using Microsoft.Extensions.DependencyInjection;
   using System;
   using System.Collections.Generic;
   using System.IO;
   using System.Linq;
   using System.Text;
   using System.Windows;

namespace CaliburnDI { public class Bootstrapper : BootstrapperBase { public IServiceProvider ServiceProvider { get; set; } public IConfiguration Configuration { get; set; }

    public Bootstrapper()
    {
        Initialize();
    }

    protected override void OnStartup(object sender, StartupEventArgs e)
    {
        var builder = new ConfigurationBuilder()
            .SetBasePath(Directory.GetCurrentDirectory())
            .AddJsonFile("appsettings.json", false, true);

        Configuration = builder.Build();

        var serviceCollection = new ServiceCollection();
        ConfigureServices(serviceCollection);

        DisplayRootViewFor<ShellViewModel>();
    }

    private void ConfigureServices(IServiceCollection services)
    {
        // UI services
        services.AddSingleton<IEventAggregator, EventAggregator>();
        services.AddSingleton<IWindowManager, WindowManager>();

        GetType().Assembly.GetTypes()
            .Where(type => type.IsClass)
            .Where(type => type.Name.EndsWith("ViewModel"))
            .ToList()
            .ForEach(viewModelType => services.AddTransient(
                viewModelType, viewModelType));
    }
}

}

6. Create Views and ViewModels folder. In the Views folder, add `ShellView.xaml` that is a Window. Then add a `HomeView.xaml` which is a UserControl.

7. Code for the `ShellViewModel.cs`

using Caliburn.Micro;

namespace CaliburnDI.ViewModels { public class ShellViewModel : Conductor

[reiniellematt]

I read the code and I saw that only ActiveItemAsync is available. I guess ActiveItem will not be used anymore.

[mvermef]

This was part of a move towards async

[schvila]

I have similar experience. Try use: await ActivateItemAsync(IoC.Get(), CancellationToken.None);