Generating absolute url to action from within Api controller

Question

im working with asp.net mvc4 and i have in 'controller1' this action :

    [HttpGet]
    public async Task<string> Action1()
    {
        try
        {
            HttpClient cl = new HttpClient();
            string uri = "controller2/action2";
            HttpResponseMessage response = await cl.GetAsync(uri);
            response.EnsureSuccessStatusCode();
            return response.ToString();
        }
        catch
        {
            return null;
        }
    }

when i set uri to "http://localhost:1733/controller2/action2" the action works fine, BUT never with uri set to "controller2/action2" or "/controller2/action2" or "~/controller2/action2".

how can i write this action without hardcoding the uri ?

Thank you.

haim770 · Accepted Answer · 2016-12-15 08:18:39Z

14

Use:

string uri = Url.Action("Action2", "Controller2", new {}, Request.Url.Scheme);

Update:

Since you're using an API controller and need to generate a Url to a regular controller, you're gonna have to use:

string uri = this.Url.Link("Default", new { controller = "Controller2", action = "Action2" });

Where Default is the name of the route defined in your registered routes collection, or if you already created a specific route for this action, use it's name and new{} as the 2nd parameter.

For MVC version 4, check your registered routes at ~/App_Start/RoutesConfig.cs. for MVC version 3, check your RegisterRoutes method in your Global.asax.

edited Dec 15, 2016 at 8:18

answered Jul 19, 2013 at 8:12

haim770

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5 Comments

dafriskymonkey Over a year ago

'System.Web.Http.Routing.UrlHelper' does not contain a definition for 'Action' and no extension method 'Action' accepting a first argument of type 'System.Web.Http.Routing.UrlHelper' could be found (are you missing a using directive or an assembly reference?)

dafriskymonkey Over a year ago

im a missing some reference ?

haim770 Over a year ago

The action you want to generate absolute Url to, is it WebApi method or a regular controller action?

dafriskymonkey Over a year ago

no its inside a regular controller. and as i said with this one "http://localhost:1733/controller2/action2" the action works, i just dont want to hardcode my action

Kugel Over a year ago

Important bit here is the Url.Link. Url.Route generates relative urls.

CleverPatrick · Accepted Answer · 2014-02-19 19:00:16Z

14

Another, perhaps simpler answer, is to create an instance of UrlHelper in your WebApi class:

var url = new UrlHelper(System.Web.HttpContext.Current.Request.RequestContext);
item.Url = url.Action("Doc", "Editor", new {id=1});

Pass in the current request context and you are gold.

answered Feb 19, 2014 at 19:00

CleverPatrick

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