Hi Jenny,
I think you need to specify how your service is provided: see the providers
section of the angular docs. <https://angular.io/guide/providers>
For instance, to make your service accessible from anywhere in your
application you could add this in @Injectable :
@Injectable({
providedIn: 'root'
})
export class APIService
Regards,
Arnaud.
Le lundi 3 décembre 2018 14:54:12 UTC+1, Jenny a écrit :
>
> Hi,
>
> How to fix this error in Angular 7 occurs when try to retrieve data from
> web apis?
>
> ERROR Error: Uncaught (in promise): Error:
> StaticInjectorError(AppModule)[AgentcategorylistingComponent ->
> ApiService]:
> StaticInjectorError(Platform: core)[AgentcategorylistingComponent ->
> ApiService]:
> NullInjectorError: No provider for ApiService!
> Error: StaticInjectorError(AppModule)[AgentcategorylistingComponent ->
> ApiService]:
> StaticInjectorError(Platform: core)[AgentcategorylistingComponent ->
> ApiService]:
> NullInjectorError: No provider for ApiService!
>
> AgentcategorylistingComponent >> is a Component
> ApiService >> is a Service
>
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