ASP — ASP.NET Routing

Attribute Routing

[Route("api/users")]
[ApiController]
public class UsersController : ControllerBase
{
    [HttpGet]
    public IActionResult GetAll() { }
    
    [HttpGet("{id}")]
    public IActionResult GetById(int id) { }
    
    [HttpPost]
    public IActionResult Create(User user) { }
}

Convention Routing

app.MapControllerRoute(
    name: "default",
    pattern: "{controller=Home}/{action=Index}/{id?}");

Route Parameters

[HttpGet("users/{id:int}")]
public IActionResult GetUser(int id) { }

[HttpGet("users/{name:alpha}")]
public IActionResult GetUserByName(string name) { }

Route Constraints

Constraint	Description
int	Integer
string	String
bool	Boolean
datetime	DateTime
decimal	Decimal

Mini Practice

1. Use attribute routing
2. Add route constraints
3. Create RESTful routes
4. Handle optional parameters

Up Next

Continue with ASP.NET Middleware — middleware.