How do I handle route parameters in ASP.NET Core?

How do I handle route parameters in ASP.NET Core?

In ASP.NET Core, you can handle route parameters by defining them in your route template. For example, you can use {id} in your route to capture an integer parameter.

Can you show me an example of a controller method that uses route parameters?

Sure! Here's a simple example:

[Route("api/[controller]")]
public class ProductsController : ControllerBase
{
    [HttpGet("{id}")]
    public ActionResult<Product> GetProduct(int id)
    {
        // Logic to retrieve the product by id
    }
}

What if I want to make the route parameter optional?

You can make a route parameter optional by adding a question mark. For example, "{id?}" allows the id parameter to be optional.

How do I validate the route parameters?

You can use model binding and data annotations to validate route parameters. For instance, you can use [FromRoute] to bind and validate parameters directly.