“‘router outlet”不是已知元素

Question

我有一个有角度前端的MVC5项目。我想添加本教程中描述的路由

https://angular.io/guide/router

..。所以在我的

我添加了一个

并在我的app.module中创建了我的路由。但当我运行此命令时，我得到以下错误：

Error: Template parse errors:
    'router-outlet' is not a known element:
    1. If 'router-outlet' is an Angular component, then verify that it is part       of this module.
    2. If 'router-outlet' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA'   to the '@NgModule.schemas' of this component to suppress this message. ("
    dashboard
    
    [ERROR ->]
     "): ng:///AppModule/AppComponent.html@5:0

在我的app.component中，这行

给出一个错误，告诉我Visual studio无法解析标记'router-outlet‘。有什么建议可以修复这个错误吗？我是不是遗漏了一个引用或导入，或者只是忽略了什么？

下面是我的package.json、app.component和app.module

{
    "version": "1.0.0",
    "name": "app",
    "private": true,
    "scripts": {},
    "dependencies": {
    "@angular/common": "^4.2.2",
    "@angular/compiler": "^4.2.2",
    "@angular/core": "^4.2.2",
    "@angular/forms": "^4.2.2",
    "@angular/http": "^4.2.2",
    "@angular/platform-browser": "^4.2.2",
    "@angular/platform-browser-dynamic": "^4.2.2",
    "@angular/router": "^4.2.2",
    "@types/core-js": "^0.9.41",
    "angular-in-memory-web-api": "^0.3.2",
    "bootstrap": "^3.3.7",
    "core-js": "^2.4.1",
    "graceful-fs": "^4.0.0",
    "ie-shim": "^0.1.0",
    "minimatch": "^3.0.4",
    "reflect-metadata": "^0.1.10",
    "rxjs": "^5.0.1",
    "systemjs": "^0.20.12",
    "zone.js": "^0.8.12"
    },
    "devDependencies": {
    "gulp": "^3.9.1",
    "gulp-clean": "^0.3.2",
    "gulp-concat": "^2.6.1",
    "gulp-tsc": "^1.3.2",
    "gulp-typescript": "^3.1.7",
    "path": "^0.12.7",
    "typescript": "^2.3.3"
    }
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { RouterModule, Routes } from '@angular/router';

import { AppComponent } from './app.component';
import {DashboardComponent} from "./dashboard/dashboard.component"    

const appRoutes: Routes = [
{
    path: '',
    redirectTo: '/dashboard',
    pathMatch: 'full',
    component: DashboardComponent
},  
{
    path: 'dashboard',
    component: DashboardComponent
}
];
@NgModule({
imports: [
    RouterModule.forRoot(appRoutes),
    BrowserModule,
    FormsModule               
],
exports: [RouterModule],
declarations: [
    AppComponent,  
    DashboardComponent      
],
bootstrap: [AppComponent]
})
export class AppModule {

}

import { Component } from '@angular/core';

@Component({
selector: 'my-app',
template: `
          {{title}}
          
          dashboard
          
          
          `
})
export class AppComponent {
    title = 'app Loaded';

}

Answer 1

尝试：

@NgModule({
  imports: [
      BrowserModule,
      RouterModule.forRoot(appRoutes),
      FormsModule               
  ],
  declarations: [
      AppComponent,  
      DashboardComponent      
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

无需在中配置导出

，因为

不会被应用程序中的其他模块导入。

Answer 2

试试这个：

导入

进入您的

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

添加

进入您的

如下所示：

imports: [    RouterModule,  ]

Answer 3

如果您正在进行单元测试并得到此错误，则导入

进入您的

或者在您的特色组件中

import { RouterTestingModule } from '@angular/router/testing';

添加

进入您的

喜欢

describe('AppComponent', () => {

  beforeEach(async(() => {    
    TestBed.configureTestingModule({    
      imports: [    
        RouterTestingModule    
      ],
      declarations: [    
        AppComponent    
      ],    
    }).compileComponents();    
  }));