Create route to webapi method with parameters via querystring

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Create route to webapi method with parameters via querystring

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#1 by (3 votes)
#2 by (0 votes)

4

I have the following route in the WebApiConfig class of an AspNet WepApi project

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "{controller}/{action}/{id}"
        );

Edited: Using the @GabrielColetta response : The route is as it is below, and now works with http://localhost:62027/Pedidos/Todos?pagina=1&filtro=117 but does not work with the following url http://localhost:62027/Pedidos/Todos?filtro=117 , only works only when both parameters are passed in the querystring.

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

What works properly for the URLs and methods below:

[HttpGet]
[ResponseType(typeof(Pedido))]
public async Task<IHttpActionResult> Detalhes(int id)

http://localhost:62027/Pedidos/Detalhes/104

But for the URL and method below does not work

[HttpGet]
[ResponseType(typeof(IPagedList<Pedido>))]
public async Task<IHttpActionResult> Todos(string filtro, string pagina)

http://localhost:62027/Pedidos/Todos?filtro=s&pagina=1
http://localhost:62027/Pedidos/Todos

The following message is displayed:

I have another AspNet MVC project that has the same route and works properly, what is the reason WebAPI does not work? What is the right way?

WebAPI project has only one route and one route file

asp.net-web-api

asked by anonymous 27.08.2017 / 21:35

2 answers

0

You are passing the wrong parameter when calling the action. The error message is page=1 and the action is waiting for the variable named pagina .

27.08.2017 / 23:40

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score 3 · Accepted Answer

He is not finding because the {id} of his route is not optional, so his entire route must have a value for {id} or he will not find a route.

Set your route this way and it will work:

config.Routes.MapHttpRoute(
    name: "DefaultApi",
    routeTemplate: "{controller}/{action}/{id}",
    defaults: new { id = UrlParameter.Optional }
);

For the url without the page value to work you have to put a default value for page:

[HttpGet]
[ResponseType(typeof(IPagedList<Pedido>))]
public async Task<IHttpActionResult> Todos(string filtro, string pagina = "")

Or you will have to overload the All method with only one parameter.