Description
CREATED BY:	Latency McLaughlin
UPDATED:	4/11/2024
FRAMEWORK:	[net452], [net46], [net461] ([Latest])
LANGUAGE:	[C#] preview
OUTPUT TYPE:	Library [API]
SUPPORTS:	[Visual Studio]
GFX SUBSYS:	[None]
TAGS:	[API], [.NET], [C#], [Dependancy Injection]
STATUS
LICENSE:
VERSION:

• Introduction
• History
• Usage
• Installation
• License

The code is same as .net core's Microsoft.Extensions.DependencyInjection. I just re-compiled the code to framewrok 4.5.1 and add two project to help use it.

In the solution, it includes some examples it shows how to use the DI in console application, asp.net Mvc or webform.

In this solution, The both of projects Microsoft.Extensions.DependencyInjection and Microsoft.Extensions.DependencyInjection.Abstractions thest code is same as Microsoft's DependencyInjection

The both of projects Microsoft.Extensions.DependencyInjection.ConsoleApp and Microsoft.Extensions.DependencyInjection.SystemWeb contains some usage codes it can help us to use the library in different solution (Console Application, WinForm, WebForm or Asp.net Mvc).

If you want to use the DI project in your console application or Winform, First the project need to reference Microsoft.Extensions.DependencyInjection,Microsoft.Extensions.DependencyInjection.Abstractions and Microsoft.Extensions.DependencyInjection.ConsoleApp projects. Second, you just need to add small codes in Program.Main, the code exmaple:

static void Main(string[] args)
{
    //Init the DI container
    DependencyInjectionStartup.Initialize(services =>
    {
        services.AddSingleton<IDao, Dao>();
    });

    //Get instnace by service type from DI container
    var dao = DIProviderInstance.ProviderInstance.GetRequiredService<IDao>();

    Console.WriteLine(dao.GetWriter());
    Console.ReadKey();
}

If you want to use the DI project in your web application (Asp.net Mvc or Asp.net WebAPI), you need to have some Front-facing step.

• Add nuget package Microsoft.Owin.Host.SystemWeb.
• Add reference Microsoft.Extensions.DependencyInjection,Microsoft.Extensions.DependencyInjection.Abstractions and Microsoft.Extensions.DependencyInjection.SystemWeb
• Add a Owin Startup class.
• Extends the abstract class DependencyInjectionStartup (Included in Microsoft.Extensions.DependencyInjection.SystemWeb).
• Add class Startup's construct method and add below code

base.Initialize();

• Implement the abstract method ServiceConfiguration, you can add object to DI container in the method.
• Add middleware in method Configuration. Example code:

public class Startup : DependencyInjectionStartup
{
    public Startup()
    {
        base.Initialize();
    }

    public void Configuration(IAppBuilder app)
    {
        app.Use<DependencyInjectionMiddleware>(base.services);
    }

    protected override void ServiceConfiguration(IServiceCollection services)
    {
        services.AddSingleton<IDao, Dao>();
    }
}

//Get object instance by service Type from DI container.
var dao = ServiceResolve.ResolveOwinFactory(HttpContext.GetOwinContext()).GetRequiredService<IDao>();

If you want to use the DI project in your web application (Asp.net WebForm), you need to have some Front-facing step.

• Add nuget package Microsoft.Owin.Host.SystemWeb.
• Add reference Microsoft.Extensions.DependencyInjection,Microsoft.Extensions.DependencyInjection.Abstractions and Microsoft.Extensions.DependencyInjection.SystemWeb
• Add a Owin Startup class.
• Extends the abstract class DependencyInjectionStartup (Included in Microsoft.Extensions.DependencyInjection.SystemWeb).
• Add class Startup's construct method and add below code

base.Initialize();

• Implement the abstract method ServiceConfiguration, you can add object to DI container in the method.
• Add middleware in method Configuration. Example code:

public class Startup : DependencyInjectionStartup
{
    public Startup()
    {
        base.Initialize();
    }

    public void Configuration(IAppBuilder app)
    {
        app.Use<DependencyInjectionMiddleware>(base.services);
    }

    protected override void ServiceConfiguration(IServiceCollection services)
    {
        services.AddSingleton<IDao, Dao>();
    }
}

//Get object instance by service Type from DI container.
var dao = ServiceResolve.ResolveHttpFactory(HttpContext.Current).GetRequiredService<IDao>();

This library can be installed using NuGet found here.

The source code for the site is licensed under the MIT license, which you can find in the MIT-LICENSE.txt file.

All graphical assets are licensed under the Creative Commons Attribution 3.0 Unported License.