A Generic Helper For XNA Services

Sick of lines like these in your Game Components? :

graphicsService = (IGraphicsDeviceService)Game.Services.GetService(typeof(IGraphicsDeviceService));

Well, me too. And since my efforts to bring it up in the XNA forums were a bit fruitless, I decided to give it a shot.

Here’s a pretty small snippet that will save you tons of typecasts and typeofs.
Just enclose with your favourite namespace declaration.

static class ServiceHelper
{
    static Game game;

    public static void Add(T service) where T : class
    {
        game.Services.AddService(typeof(T), service);
    }

    public static T Get() where T : class
    {
        return game.Services.GetService(typeof(T)) as T;
    }

    public static Game Game
    {
        set { game = value; }
    }
}

Then, make sure that you’re assigning the Game property in your Game’s constructor :

public MyGame()
{
    // ...
    ServiceHelper.Game = this;
}

And then use it!

// In MyGame.Initialize()
ServiceHelper.Add(new MyService());

// In any component's Initialize() method
myService = ServiceHelper.Get();