已注册服务中的Autofac属性注入

Question

I'm using Autofac to DI and MVVM. I have a global service registered as such:

builder.RegisterType<MyGlobalService>().As<IGlobalService>().SingleInstance();

I'm also using Autofac.Extras.NLog implementation for obvious logging purposes:

builder.RegisterModule<NLogModule>();

this way I can get the instance of that service and logger in any of my ViewModels:

namespace MyNameSpace.ViewModels
{
    class MyViewModel : BindableBase
    {
        readonly IGlobalService _globalService;
        readonly ILogger _logger;

        public MyViewModel (IGlobalService globalService, ILogger logger)
        {
            _globalService = globalService;
            _logger = logger;

}}}(...)

It works great. Now I also want logging support inside MyGlobalService. But this time, I would like to use Property Injection, instead of Constructor Injection.

Question is: should I register such a rule differently?

Example usage:

namespace MyNameSpace.GlobalServices
{
    class MyGlobalService : IGlobalService
    {
        public ILogger Logger { get; set; }

        public MyGlobalService ()
        {               
            Logger.Debug("My Service Starting...") 
            // no DI happening, getting exception because "Logger" is null

}}}(...)

Edit: Answered below.

Answer 1

Property Injection does not work out-of-the-box, you need to set up class you want to use property injection in, so

builder.RegisterType<MyGlobalService>().As<IGlobalService>().PropertiesAutowired().SingleInstance();

should do the trick. Or you could do this manually using OnActivating lifetime event.