angular2: http post not executing

Observables are lazy so you need to subscribe on them to make the request execute even if you don’t want to handle the response.

Something like that:

save(model) {
  var uri = this._baseUri + "/api/contact/AddContact";
  let md = JSON.stringify(model);

  this.http.post(uri,
    JSON.stringify(md),
    {
      headers: new Headers({
        'Content-Type': 'application/json'
      })
    })
    .map(res => res.json()).subscribe();
  }

Hope it helps you,
Thierry