const aoRoutes: Routes = [
  {
    path: "",
    redirectTo: "/ao/list",
    pathMatch: "full"
  },
  {
    path: "ao",
    component: AppelOffreComponent,
    children: [

      {
        path: "list",
        component: ListAoComponent,
        children: [

          {
            path: "edit/:ao_id",
            component: EditAoComponent
          },
..
];

this._aoService
          .updateAO(appelOffre)

          .subscribe(success => {
            this.statusCode = success;
            this.loading = false;
          }, error => (this.statusCode = error));

        this.router.navigate(["../../"], { relativeTo: this.route });