CODEWITHSUNDEEP
javascriptangularmodal-dialogviewchild
Nammen8
Nammen8

Reputation: 629

Angular 4 - Access to father element view is undefined with @ViewChild

I need to create a modal to manage errors. So I suppose that the best solution is to put this modal in my app.component so that I can use a single modal in my project:

<my-dialog #MyErrorDialog>
    ...
</my-dialog>

now I need to open this modal in many components or services when an http code occurs but with the reference id:

@ViewChild('MyErrorDialog') MyErrorDialogReference: MyDialog;

MyErrorDialogReference in my child component/service is undefined because the modal is in the app component.

I don't want to use @Input/@Output.

Upvotes: 1

Views: 143

Answers (1)

Anshuman Jaiswal
Anshuman Jaiswal

Reputation: 5462

You can use service as:

ErrorService

public errorMessage = new Subject<string>();
setErrorMessage(value: string) {
    this.errorMessage.next(value);
}

any other component Notify service about error

constructor(public errorService: ErrorService) { }
setMessage(message) { // call this method whenever you get error
    this.errorService.setErrorMessage(message);
}

app.component receive error in App component

errorMessage: string;
errorSubscription: Subscription;
constructor(public errorService: ErrorService) { }
ngOnInit() {
    this.errorSubscription = this.errorService.errorMessage.subscribe(
        (message) => {
            this.errorMessage = message;
            // open dialog with message
        }
    );
}
ngOnDestroy() {
    this.errorSubscription.unsubscribe();
}

Upvotes: 1

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