WinForms.Extensions.DependencyInjection

Advanced Dependency Injection (DI) integration tailored for Windows Forms applications. Built on top of Microsoft.Extensions.DependencyInjection, but adapted and extended to address WinForms-specific development needs.

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Key Features

• Simplified DI container setup with native support for WinForms.
• Scoped form creation for automatic lifecycle and resource management.
• Dependency injection via constructor or [Inject]-marked properties.
• IInjectable interface for post-injection initialization.
• Global singleton access to the service provider.
• Enables clean, decoupled, and testable architecture.
• Seamless integration with companion frameworks Reactive and RouteManager.

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Installation

Add the package via NuGet or build from source:

dotnet add package WinForms.Extensions.DependencyInjection

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Quick Start

Setup in Program.cs

using Microsoft.Extensions.DependencyInjection; using WinForms.Extensions.DependencyInjection.Bootstrap; var services = new ServiceCollection(); // Register your services and forms here services.AddSingleton<IMainService, MainService>(); services.AddTransient<MainForm>(); services.AddSingleton<FormFactory>(); var provider = services.BuildWinFormsServiceProvider(); ServiceProviderGlobal.Instance.Initialize(provider); Application.Run(provider.GetRequiredService<MainForm>());

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Creating scoped forms

var formFactory = provider.GetRequiredService<FormFactory>(); var settingsForm = formFactory.CreateScopedForm<SettingsForm>(); settingsForm.Show();

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Property injection with [Inject]

public partial class MainForm : Form, IInjectable { [Inject] public IMyService MyService { get; set; } public MainForm() { InitializeComponent(); this.ResolveInjectedProperties(ServiceProviderGlobal.Instance.Provider); } public void OnInjected() { // Initialization logic after injection } }

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Public API

• ServiceProviderBuilder.BuildWinFormsServiceProvider(IServiceCollection): Builds the DI container.
• FormFactory.CreateScopedForm<T>(): Creates a form with its own scoped lifetime.
• [Inject]: Attribute to mark properties for injection.
• ResolveInjectedProperties(this object, IServiceProvider): Extension for automatic property injection.
• IInjectable: Interface for post-injection initialization callback.
• ServiceProviderGlobal.Instance: Singleton for global service provider access.

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Benefits

This module addresses common DI challenges in WinForms by integrating naturally with the platform and respecting its paradigms. It simplifies transitioning to modern, maintainable architectures.

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Repository and Contribution

https://github.com/JoeDevSharp/WinForms.Extensions.DependencyInjection

Contributions, issues, and pull requests are welcome.