How to make the route for web api .NET framework contain '? and =' in the url instead of just '/' ?

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now in the URL i type:

localhost/api/controller/1/34.5/31.2/

but this is what i want

localhost/api/controller?Id=1&num1=34.5&num2=31.2

What I have tried:

Right now this is my Route
<pre>
[HttpGet]
[Route("api/Controller/{Id}/{num1}/{num2}/", Name = "GetInfo")]

Posted 16-Apr-20 20:29pm

Member 14800672

Updated 21-Apr-20 3:55am

v2

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Maciej Los 17-Apr-20 6:10am

Please, read this: Parameter Binding in Web API[^]

Member 14800672 17-Apr-20 8:35am

Hi,

yes i read it but it doesn't specify anything

Here's the URL i tried: https://localhost:****/api/Customer?Id=1&num1=1&num2=1.2/
but i'm getting this error
No HTTP resource was found that matches the request URI

However it works if i use slashes: https://localhost:****/api/Customer/Id/1/num1/1.1/num2/3.2/

Here's the route for my method:
[HttpGet]
[Route("api/Customer/{Id}/{num1}/{num2}/", Name = "GetCustomers")]
public IHttpActionResult GetCustomers(int Id, double num1, double num2)
{
}

And here's my register method:
public static void Register(HttpConfiguration config)
{
// Web API configuration and services

// Web API routes
config.MapHttpAttributeRoutes();

config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{Id}/{num1}/{num2}",
defaults: new {
Id = RouteParameter.Optional,
num1= RouteParameter.Optional,
num2= RouteParameter.Optional
}
);

}

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Richard Deeming · Answer 1 · 2020-04-21T03:56:00

Attribute Routing in ASP.NET Web API 2 | Microsoft Docs[^]

You have a single route on your action which requires all three parameters to be passed within the URL. When you put the parameters in the querystring, that route no longer matches.

If you want to pass the values in the querystring instead, change your route to:

C#

[HttpGet]
[Route("api/Customer", Name = "GetCustomers")]
public IHttpActionResult GetCustomers(int Id, double num1, double num2)

If you want to support both options, you can have multiple routes on the same action, although they obviously can't have the same name:

C#

[HttpGet]
[Route("api/Customer")]
[Route("api/Customer/{Id}/{num1}/{num2}/", Name = "GetCustomers")]
public IHttpActionResult GetCustomers(int Id, double num1, double num2)

NB: If all of the actions in your controller have the same route prefix, you might want to use the RoutePrefix attribute[^] on your controller instead.

C#

[RoutePrefix("api/Customer")]
public class CustomerApiController : ApiController
{
    [HttpGet]
    [Route("")]
    [Route("{Id}/{num1}/{num2}/", Name = "GetCustomers")]
    public IHttpActionResult GetCustomers(int Id, double num1, double num2)