'router-outlet'不是一个已知的元素

问题描述 投票：41回答：10

我有一个带角度前端的mvc 5项目。我想按照本教程https://angular.io/guide/router中的描述添加路由。所以在我的_Layout.cshtml中我添加了一个

<base href="/">

并在我的app.module中创建了我的路由。但是当我运行这个时，我收到以下错误：

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. ("
    <a routerLink="/dashboard">dashboard</a>
    </nav>
    [ERROR ->]<router-outlet></router-outlet>
     "): ng:///AppModule/AppComponent.html@5:0

在我的app.component中

<router-outlet></router-outlet>

给出一个错误，告诉我Visual Studio无法解析标签'router-outlet'。有任何建议我如何解决这个错误？我错过了参考或导入或只是忽略了什么？

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

的package.json

{
  "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"
  }
}

app.module：

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 {

}

app.component：

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

@Component({
selector: 'my-app',
template: `
          <h1>{{title}}</h1>
          <nav>
          <a routerLink="/dashboard">dashboard</a>
          </nav>
          <router-outlet></router-outlet>
          `
})
export class AppComponent {
    title = 'app Loaded';

}
angular asp.net-mvc-5 angular2-routing
10个回答
39
投票

试试：

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

}

没有必要在AppModule中配置导出，因为AppModule不会被应用程序中的其他模块导入。

0
投票

如果有人收到错误，这是快速简单的解决方案：

“'router-outlet'在角度项目中不是一个已知的元素，

然后，

只需转到“app.module.ts”文件并添加以下行：

import { AppRoutingModule } from './app-routing.module';

还有'AppRoutingModule'进口。

32
投票

试试这个：

将RouterModule导入你的app.module.ts

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

将RouterModule添加到你的imports []

像这样：

 imports: [    RouterModule,  ]
18
投票

如果您正在进行单元测试并获得此错误，请将RouterTestingModule导入app.component.spec.ts或您的特色组件的spec.ts内

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

Add RouterTestingModule into your imports [] like 

describe('AppComponent', () => {

  beforeEach(async(() => {    
    TestBed.configureTestingModule({    
      imports: [    
        RouterTestingModule    
      ],
      declarations: [    
        AppComponent    
      ],    
    }).compileComponents();    
  }));
8
投票

假设您正在使用带有angular-cli的Angular 6，并且您已创建了一个负责路由活动的单独路由模块 - 在Routes数组中配置您的路由。请确保您在exports数组中声明了RouterModule。代码看起来像这样：

@NgModule({
      imports: [
      RouterModule,
      RouterModule.forRoot(appRoutes)
     // other imports here
     ],
     exports: [RouterModule]
})
export class AppRoutingModule { }
4
投票

当我在app.module.ts中添加以下代码时，它适用于我

@NgModule({
...,
   imports: [
     AppRoutingModule
    ],
...
})
2
投票

谢谢Hero Editor的例子，我找到了正确的定义：

当我生成应用路由模块时：

ng generate module app-routing --flat --module=app

并更新app-routing.ts文件以添加：

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

以下是完整的示例：

import { NgModule }             from '@angular/core';
import { RouterModule, Routes } from '@angular/router';

import { DashboardComponent }   from './dashboard/dashboard.component';
import { HeroesComponent }      from './heroes/heroes.component';
import { HeroDetailComponent }  from './hero-detail/hero-detail.component';

const routes: Routes = [
  { path: '', redirectTo: '/dashboard', pathMatch: 'full' },
  { path: 'dashboard', component: DashboardComponent },
  { path: 'detail/:id', component: HeroDetailComponent },
  { path: 'heroes', component: HeroesComponent }
];

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

并将AppRoutingModule添加到app.module.ts导入中：

@NgModule({
  declarations: [
    AppComponent,
    ...
  ],
  imports: [
    BrowserModule,
    FormsModule,
    AppRoutingModule
  ],
  providers: [...],
  bootstrap: [AppComponent]
})
1
投票

最好创建一个可以处理所有路由的路由组件！从角网站文档！这是一个很好的做法！

ng generate module app-routing --flat --module = app

上面的CLI生成一个路由模块并添加到你的app模块，你需要从生成的组件中做的就是声明你的路由，也不要忘记添加这个：

exports: [
    RouterModule
  ],

到您的ng-module装饰器，因为默认情况下它没有生成的app-routing模块！

1
投票

这个问题也和我在一起。简单的伎俩。

 @NgModule({
  imports: [
   .....       
  ],
 declarations: [
  ......
 ],

 providers: [...],
 bootstrap: [...]
 })

按照上面的顺序使用它。先输入然后声明。它对我有用。

0
投票

在app.module.ts文件中

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

const appRoutes: Routes = [
{
    path: '',
    redirectTo: '/dashboard',
    pathMatch: 'full',
    component: DashboardComponent
},  
{
    path: 'dashboard',
    component: DashboardComponent
}
];

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

}

添加此代码。快乐的编码。

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