Passing asp.net server parameters to Angular 2 app

Question

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EDIT : SOLUTION After upgrading to 2.0 Final - Passing server parameters to ngModule after RC5 upgrade

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Any way to have server parameters passed to an Angular 2 application?

i.e. I would like to use the MVC object "HttpContext.User.Identity.Name" and have it injectable anywhere in my angular 2 app.

In angular 1 this was possible using ng ".constant" and serializing .Net objects to JSON in index.cshtml.

Looks like there's a way to pass params but this doesn't work with .Net code. Define global constants in Angular 2

        //HTML - Bootstrapping
        <script>

            System.import('app/main').then(null, console.error.bind(console));
            //I WOULD LIKE TO PASS SOME PARAMS TO APP/MAIN HERE
        </script>

FINAL SOLUTION: (big thanks to Thierry)

index.cshtml:

<script>
    System.import('app/main').then(
        module => 
            module.main(
                {
                    name: '@User.Identity.Name',
                    isAuthenticated: User.Identity.IsAuthenticated.ToString().ToLowerInvariant(),
                }
            ),
        console.error.bind(console)
    );
</script>

main.ts:

...
    import {provide} from '@angular/core';
...

    export function main(params) {
        bootstrap(AppComponent,
            [
                provide('Name', { useValue: params.name }),
                provide('IsAuthenticated', { useValue: params.isAuthenticated }),
                ROUTER_PROVIDERS,
                HTTP_PROVIDERS,
                LoggerService,
                AuthenticationService
            ]);
    }

Usage:

import {Component, Injectable, Inject} from '@angular/core';
import {ROUTER_DIRECTIVES} from '@angular/router';

@Component({
    selector: 'navbar',
    templateUrl: 'app/components/header/navbar.html',
    directives: [ROUTER_DIRECTIVES]
})
export class SomeComponent {

    constructor(@Inject('Name') public username: string) {

    }

}

Answer 1

An option would be to add a method in the module you import. So you can then call it to provide the object you want.

Here is a sample of the app/main module:

import {bootstrap} from '...';
import {provide} from '...';
import {AppComponent} from '...';

export function main(params) {
  let userIdentityName = params.name; // for example
  bootstrap(AppComponent, [
    provide('userIdentityName', { useValue: userIdentityName })
  ]);
}

Then you can import it from your HTML main page like this:

<script>
  System.import('app/main').then((module) => {
    module.main({
      userIdentityName: 'something from asp.net'
    });
  });
</script>

Update

With latest versions of Angular, you need to leverage modules this way:

export const USER_IDENTITY_NAME_TOKEN =
  new  InjectionToken('userIdentityName');

@NgModule({
  (...)
  providers: [
    {
      provide: USER_IDENTITY_NAME_TOKEN,
      useValue: userIdentityName
    }
  ]
})
export class MainModule() { }