Angular2 HTTP Post ASP.NET MVC Web API

Question

How do you properly create a Web API POST of complex object or multiple parameters using Angular2?

I have a service component in Angular2 as seen below:

Answer 1

If you call Web API 2.2 post method from Angular 2 type script, dont forget to add following header content and parameter object.

let headers = new Headers({ 'Content-Type': 'application/x-www-form-urlencoded' }); 
 var params = new URLSearchParams();
        params.set('userid', '102');
        params.set('username', 'foo');

 return this._http.post('http://localhost:6579/api/PostUser', params.toString(), { headers: headers }).map(res => res.json());