Angular2 - 'router-outlet'不是已知元素

Question

我创建了具有深子路径的路线.我添加<router-outlet>到AdminComponent组件中,我将其包装到NgModule中.但刷新页面后,我收到此错误:

'router-outlet' is not a known element

也许是因为我忘了将一些模块导入admin.module.ts

请帮忙.谢谢.

app.routes.ts

export const routes: Routes = [
    {
        path: '',
        component: AppComponent,
        children: [
            {
                path: '',
                component: LoginComponent
            },
            {
                path: 'admin',
                component: AdminComponent
            },
            {
                path: 'user',
                component: UserComponent
            },
            {
                path: 'there',
                component: ThereComponent
            }
        ]
    }
]

app.module.ts

@NgModule({
    imports: [
        BrowserModule,
        AppRoutes,
        FormsModule,
        ReactiveFormsModule,
        HttpModule,
        RouterModule,
        TranslateModule.forRoot({
            provide: TranslateLoader,
            useFactory: (http: Http) => {
                return new TranslateStaticLoader(http, './src/assets/i18n', '.json')
            },
            deps: [Http]
        }),
        UserComponentModule,
        AdminComponentModule,
        LoginComponentModule,
        ThereComponentModule,
        DashboardComponentModule
    ],
    declarations: [
        AppComponent
    ],
    providers: [
        FormBuilder
    ],
    bootstrap: [AppComponent]
})

admin.component.ts和admin.module.ts

//  admin.component.ts
import {Component} from "@angular/core";

@Component({
    selector: 'admin',
    template: "<router-outlet></router-outlet>",
})

export class AdminComponent {
    constructor() {

    }
}

//  admin.module.ts
const ADMIN_DECLARATION = [
    AdminComponent
];

@NgModule({
    imports: [
        BrowserModule,
        TranslateModule,
        FormsModule,
        ReactiveFormsModule
    ],
    declarations: [
        ADMIN_DECLARATION
    ],
    exports: [
        ADMIN_DECLARATION
    ],
    providers: [
        TranslateService,
        FormBuilder
    ]
})

export class AdminComponentModule {

}

Answer 1

AdminComponent是部分内容AdminComponentModule,您没有导入RouterModule内部 AdminComponentModule模块:

//  admin.component.ts
import {Component} from "@angular/core";

@Component({
    selector: 'admin',
    template: "<router-outlet></router-outlet>",
})

export class AdminComponent {
    constructor() {

    }
}

//  admin.module.ts
const ADMIN_DECLARATION = [
    AdminComponent
];

@NgModule({
    imports: [
        BrowserModule,
        TranslateModule,
        RouterModule,
        FormsModule,
        ReactiveFormsModule
    ],
    declarations: [
        ADMIN_DECLARATION
    ],
    exports: [
        ADMIN_DECLARATION
    ],
    providers: [
        TranslateService,
        FormBuilder
    ]
})

export class AdminComponentModule {

}

Answer 2

你没有导出RouterModule.

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})

Answer 3

添加此代码

import { provideRoutes} from '@angular/router';

到你的 app.module.ts

为我工作.