SimpleDi

Declarative Dependency Injection and Configuration for .NET

---

SimpleDi allows you to inject interfaces and types using attributes. No need for complex frameworks or manually adding injections to your startup code.

Setup:

using DigitalRuby.SimpleDi; var builder = WebApplication.CreateBuilder(args); builder.Services.AddSimpleDi();

---

Implementation:

Create a class, MyInterfaceImplementation

// Interface will be available in constructors public interface IMyInterface { } // bind the class to simpledi, implementing IMyInterface [Binding(BindingType.Singleton)] public sealed class MyInterfaceImplementation : IMyInterface { }

Inject the interface into the constructor of another class:

[Binding(BindingType.Singleton)] public sealed class MyClass { public MyClass(IMyInterface myInterface) { } }

---

Simple di takes care of hosted services too.

[Binding(BindingType.Singleton)] public sealed class MyHostedClass : IHostedService { public Task StartAsync(CancellationToken cancellationToken) => Task.CompletedTask; public Task StopAsync(CancellationToken cancellationToken) => Task.CompletedTask; }

---

You can choose whether to bind no interfaces or only some interfaces:

// only register MyClass concrete type [Binding(BindingType.Singleton, null)] public sealed class MyClass1 : IInterface1, IInterface2 { } // only register MyClass concrete type and IInterface1 [Binding(BindingType.Singleton, typeof(IInterface1))] public sealed class MyClass2 : IInterface1, IInterface2 { }

---

Configuration:

Given a json file in your project config.json (set as content and copy newer in properties):

{ "DigitalRuby.SimpleDi.Tests.Configuration": { "Value": "hellothere" } }

And a class with the same namespace as in the file...

namespace DigitalRuby.SimpleDi.Tests; /// <summary> /// Config class that binds to key DigitalRuby.SimpleDi.Tests.Configuration /// </summary> [Configuration] public sealed class Configuration { /// <summary> /// Example value /// </summary> public string Value { get; set; } = string.Empty; // overriden from config }