Microsoft.Extensions.HostBuilder integration sample

[maxkatz6]

Topics to cover

It shouldn't be a much related to avalonia, nor a big problem. But users expect some build in solution for this integration.
We should at least have ready to show sample in this repo, which would answer these questions.

Ideas for a sample

How to:

• Setup MS host
• Setup DI
• Create VM from the IoC

Additional context

Related:
AvaloniaUI/Avalonia#8588
AvaloniaUI/Avalonia#5241 (comment)
AvaloniaUI/Avalonia#8936

[kekekeks]

Some sample code to set up view locator using Microsoft DI:

    public class ViewLocator : IDataTemplate
    {
        private readonly Dictionary<Type, Func<Control>> _dic;
        public ViewLocator(IEnumerable<ViewLocationDescriptor> descriptors)
        {
            _dic = descriptors.ToDictionary(x => x.ViewModel, x => x.Factory);
        }
        public record ViewLocationDescriptor(Type ViewModel, Func<Control> Factory);
        
        public IControl Build(object param) => _dic[param.GetType()]();

        public bool Match(object data) => _dic.ContainsKey(data.GetType());
    }
    
    
        public static IServiceCollection AddView<TViewModel, TView>(this IServiceCollection services) where TView : Control, new()
        {
            services.AddSingleton(new ViewLocator.ViewLocationDescriptor(typeof(TViewModel), () => new TView()));
            return services;
        }
        

[timunie]

That's a great idea and also something I struggle with. So a good opportunity to learn this stuff ^^