Window dependency injection

问题

I want to use Unity dependency injection in WPF application. My Window throw System.Windows.Markup.XamlParseException:

"For type MainWindow found no default constructor".

This is my code:

App.xaml.cs:

IUnityContainer container = new UnityContainer();
container.RegisterType<MainWindow>();
container.RegisterType<IService, MyService>();
container.RegisterType<IRepository, MyRepository>();
container.Resolve<MainWindow>().Show();

MainWindow.xaml.cs:

public MainWindow(IService service)
{
     InitializeComponent();
     service.Test();
}

回答1:

You always need to have a default constructor for your view in order for your WPF application to work properly.

public MainWindow()
{
     InitializeComponent();
}

and then define the parameterized constructor like this :

public MainWindow(IService service) : this()
{
     service.Test();
}

来源：https://stackoverflow.com/questions/38699636/window-dependency-injection