Caliburn.Micro + Autofac bootstrapping

autofac, caliburn.micro, dependency-injection, mvvm, wpf

Solution

There are a couple of things wrong with your solution.

Firstly, nothing invokes your `AppBootstrapper`. This is normally done in Caliburn.Micro by adding your bootstrapper type as a resource in `App.xaml`. See here for the instructions for WPF.

i.e. your `App.xaml` should look like this:

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

Secondly, as your view models and views are in different assemblies, both Caliburn.Micro and Autofac will need to know where they are located (for view location and dependency resolution respectively).

The Autofac bootstrapper you are using resolves dependencies from the `AssemblySource` instance that Caliburn.Micro uses for view location. Therefore, you just need to populate this assembly source collection. You do this by overridding `SelectAssemblies` in your `AppBootstrapper`:

protected override IEnumerable<Assembly> SelectAssemblies()
{
    return new[]
               {
                   GetType().Assembly, 
                   typeof(ShellViewModel).Assembly, 
                   typeof(ShellView).Assembly
               };
}

Problem

I have a project with Caliburn.Micro, and I'm trying to port from its `SimpleContainer` to Autofac. I'm using this code, that is an updated version of the code in this guide. Using `SimpleContainer` I simply did (inside the bootstrapper) ``` protected override void OnStartup(object sender, System.Windows.StartupEventArgs e) { this.DisplayRootViewFor<IScreen>(); // where ShellViewModel : Screen } ``` Now this doesn't work anymore, so what should I do to integrate Autofac with Caliburn.Micro ?

Original source