ASP — ASP.NET Web API

Create API

dotnet new webapi -n MyApi
cd MyApi
dotnet run

Controller

[ApiController]
[Route("api/[controller]")]
public class ProductsController : ControllerBase
{
    private readonly IProductService _service;
    
    public ProductsController(IProductService service)
    {
        _service = service;
    }
    
    [HttpGet]
    public IActionResult GetAll()
    {
        return Ok(_service.GetAll());
    }
    
    [HttpGet("{id}")]
    public IActionResult GetById(int id)
    {
        var product = _service.GetById(id);
        if (product == null) return NotFound();
        return Ok(product);
    }
    
    [HttpPost]
    public IActionResult Create([FromBody] Product product)
    {
        var created = _service.Create(product);
        return CreatedAtAction(nameof(GetById), new { id = created.Id }, created);
    }
}

HTTP Methods

Method	Action
GET	Read
POST	Create
PUT	Update
DELETE	Delete

Mini Practice

1. Create Web API project
2. Create controller
3. Implement CRUD
4. Test with Postman

Up Next

Continue with ASP.NET Routing — routing.