Russkyc.DependencyInjection 0.9.7

Russkyc.DependencyInjection

A bare-bones dependency injection container with auto dependency resolving.

Usage

1. Inline Container Creation

// Create container
var services = new ServicesCollection()
            .AddSingleton<ILogger, ConsoleLogger>()
            .AddSingleton<IMainViewModel, MainViewModel>()
            .AddTransient<MainView>()
            .Build();

// Build container
BuilderServices.BuildWithContainer(services);
// Resolve service (auto resolves constructor dependencies
BuilderServices.Resolve<MainView>().Show();

2. Separate container builder (Cleaner code)

1. Setup

// Container builder
public static class BuildContainer
{
    // Returns container with registered dependencies
    public static IServicesContainer ConfigureServices()
    {
        return new ServicesCollection()
            .AddSingleton<ILogger,ConsoleLogger>()
            .AddSingleton<IMainViewModel,MainViewModel>()
            .AddTransient<MainView>()
            .Build();
    }
}

2. Usage

BuilderServices.BuildWithContainer(BuildContainer.ConfigureServices());
BuilderServices.Resolve<MainView>().Show();

Auto resolve dependencies

Dependency auto resolves through constructor injection. Here's what that looks like:

1. Add dependency initialization to constructor

public class MainViewModel : IMainViewModel
{
    private readonly ILogger _logger;
    
    // Constructor injection of logger
    public MainViewModel(ILogger logger)
    {
        _logger = logger;
    }
}

2. Container Setup

public static class BuildContainer
{
    // Returns container with registered dependencies
    public static IServicesContainer ConfigureServices()
    {
        // Order is important.
        // dependencies to be injected should be registered first
        return new ServicesCollection()
            // Register Logger
            .AddSingleton<ILogger,ConsoleLogger>()
            // Register ViewModel
            .AddSingleton<IMainViewModel,MainViewModel>()
            .AddTransient<MainView>()
            .Build();
    }
}

3. Resolving

// Auto injects the registered ILogger Service(ConsoleLogger) to the constructor
var viewModel = BuilderServices.Resolve<IMainViewModel>();