I have two other posts on multiple GET methods, both for Web Api 2, the first shows how to use routes like ‘http://…/api/values/geta’ and the second shows ‘http://…/api/values/22’ or ‘http://…/api/values/AAC1FB7B-978B-4C39-A90D-271A031BFE5D’.

I was recently working on a Asp.Net 5 Web.Api application and needed a controller with multiple get methods.
I wanted to have something like GetByAdminId(int adminId) and GetByMemberId(int memberId) (yes I know people will say that you should have two controllers and maybe even two webservices, but that is the scenario I was faced with).

Of course this should not be the most difficult problem, but it was not obvious either.

Here is the solution.

using Microsoft.AspNet.Mvc;

namespace ControllerWithMultipleGetMethods.Controllers
{
    [Route("api/[controller]")] /* this is the default prefix for all routes, see line 20 for overriding it */ 
    public class ValuesController : Controller
    {
        [HttpGet] // this api/Values
        public string Get()
        {
            return string.Format("Get: simple get");
        }

        [Route("GetByAdminId")] /* this route becomes api/[controller]/GetByAdminId */
        public string GetByAdminId([FromQuery] int adminId)
        {
            return $"GetByAdminId: You passed in {adminId}";
        }

        [Route("/someotherapi/[controller]/GetByMemberId")] /* note the / at the start, you need this to override the route at the controller level */
        public string GetByMemberId([FromQuery] int memberId)
        {
            return $"GetByMemberId: You passed in {memberId}";
        }

        [HttpGet]
        [Route("IsFirstNumberBigger")] /* this route becomes api/[controller]/IsFirstNumberBigger */
        public string IsFirstNumberBigger([FromQuery] int firstNum, int secondNum)
        {
            if (firstNum > secondNum)
            {
                return $"{firstNum} is bigger than {secondNum}";
            }
            return $"{firstNum} is NOT bigger than {secondNum}";
        }
    }
}