Passing asp.net server parameters to Angular 2 app

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() { }