Required query string parameter in ASP.NET Core

Question

Using ASP.NET Core 1.1 with VS2015 (sdk 1.0.0-preview2-003131), I have the following controller:

public class QueryParameters
{
    public int A { get; set;          


        

Answer 1

Use attribute routing and list each required parameter in the function's HttpGet attribute.

[Route("api/[controller]")]
public class ValuesController : Controller
{
    [HttpGet("{A}")]
    public IEnumerable Get(int A, int B)
    {
       return new [] { A.ToString(), B.ToString() };
    }
}

This will require e.g /5 and allow /5?B=6 query url parameters.