ASP — ASP.NET Core

What is ASP.NET Core?

ASP.NET Core is a cross-platform, high-performance framework for building web apps.

Create Project

dotnet new webapp -n MyApp
cd MyApp
dotnet run

Program.cs

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapGet("/", () => "Hello, World!");

app.Run();

Controller

[ApiController]
[Route("api/[controller]")]
public class UsersController : ControllerBase
{
    [HttpGet]
    public IActionResult Get()
    {
        return Ok(new[] { "John", "Jane" });
    }
    
    [HttpPost]
    public IActionResult Post([FromBody] User user)
    {
        return CreatedAtAction(nameof(Get), user);
    }
}

Dependency Injection

builder.Services.AddScoped<IUserService, UserService>();

app.MapGet("/users", (IUserService service) => service.GetAll());

Mini Practice

1. Create project
2. Create API controller
3. Use dependency injection
4. Run the application

Up Next

Continue with ASP.NET Web API — Web API.