DI Error in Angular2 component

Question

i got this error when i try to inject the service to my component

1. I created my service and decorated it with @Injectable()

2. I added my service to my app.module in providers

3. I tried to use the service in my component and inject it using the constructor

   but it gave me this error

Answer 1

You forgot to add HttpModule to imports array

@NgModule({
  imports: [
    BrowserModule,
    HttpModule,
    ...