[英]Angular 7: problem with include Component
我有這個組件,已經在app.module.ts中注冊了:
import { Component } from '@angular/core';
import { MessageService } from 'primeng/api';
@Component({
selector: 'app-modal',
templateUrl: './modal.component.html',
styleUrls: ['./modal.component.css'],
providers: [MessageService]
})
export class ModalComponent {
constructor(
private messageService: MessageService
) { }
onConfirm() {
}
showError(error) {
}
}
但我不能將此組件包含在另一個組件中。 我收到此錯誤:
錯誤錯誤:未捕獲(承諾):錯誤:StaticInjectorError(AppModule)[TopbarComponent-> ModalComponent]:StaticInjectorError(平台:core)[TopbarComponent-> ModalComponent]:
這是我的TopbarComponent:
import { Component } from '@angular/core';
import { SessionStorageService } from 'angular-web-storage';
import { Router } from "@angular/router"
import { AppComponent } from '../app.component';
import { ModalComponent } from '../modal/modal.component';
import { HomeComponent } from '../home/home.component';
import { JhttpService } from '../jhttp.service';
@Component({
selector: 'app-topbar',
templateUrl: './topbar.component.html'
})
export class TopbarComponent {
user = this.session.get('USER');
constructor(
private jhttpService: JhttpService,
private session: SessionStorageService,
private router: Router,
private glob: AppComponent,
private modal: ModalComponent,
private app: HomeComponent
) { }
onLogoutButtonClick(event) {
this.modal.showError('CIAO');
event.preventDefault();
}
}
有什么建議嗎?
從構造函數注入中刪除組件。
import { Component } from '@angular/core';
import { SessionStorageService } from 'angular-web-storage';
import { Router } from "@angular/router"
import { AppComponent } from '../app.component';
import { ModalComponent } from '../modal/modal.component';
import { HomeComponent } from '../home/home.component';
import { JhttpService } from '../jhttp.service';
@Component({
selector: 'app-topbar',
templateUrl: './topbar.component.html'
})
export class TopbarComponent {
user = this.session.get('USER');
constructor(
private jhttpService: JhttpService,
private session: SessionStorageService,
private router: Router
) { }
onLogoutButtonClick(event) {
this.modal.showError('CIAO');
event.preventDefault();
}
}
不要在構造函數中添加組件。 還要確保另一個ModalComponent
必須成為使用它的模塊的一部分。 在使用模塊的模塊中導入“ ModalComponent”模塊,或者將ModalComponent
添加到使用模塊的declaration
數組中。
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