Angular NullInjectorError:没有ChildrenOutletContext的提供程序

我还在学习。我试图在stackblitz上创建一个示例来问另一个问题，但遇到了一个路由问题

我正在尝试设置路由。我已将以下内容添加到app.module.ts：

  imports:      [ BrowserModule,
                  FormsModule,
                  RouterModule,

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

import { NavComponent } from './components/NavComponent';
import { SearchComponent } from './components/SearchComponent';
import { ViewComponent } from './components/ViewComponent';

const routes: Routes = [
  { path: '', redirectTo: '/nav', pathMatch: 'full' },
  { path: 'nav', component: NavComponent },
  { path: 'search', component: SearchComponent },
  { path: 'view', component: ViewComponent }
];

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

export class AppRoutingModule {}

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

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

然后我创建了app-routing.module.ts：

  imports:      [ BrowserModule,
                  FormsModule,
                  RouterModule,

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

import { NavComponent } from './components/NavComponent';
import { SearchComponent } from './components/SearchComponent';
import { ViewComponent } from './components/ViewComponent';

const routes: Routes = [
  { path: '', redirectTo: '/nav', pathMatch: 'full' },
  { path: 'nav', component: NavComponent },
  { path: 'search', component: SearchComponent },
  { path: 'view', component: ViewComponent }
];

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

export class AppRoutingModule {}

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

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

然后将这些导入添加到app.module.ts：

  imports:      [ BrowserModule,
                  FormsModule,
                  RouterModule,

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

import { NavComponent } from './components/NavComponent';
import { SearchComponent } from './components/SearchComponent';
import { ViewComponent } from './components/ViewComponent';

const routes: Routes = [
  { path: '', redirectTo: '/nav', pathMatch: 'full' },
  { path: 'nav', component: NavComponent },
  { path: 'search', component: SearchComponent },
  { path: 'view', component: ViewComponent }
];

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

export class AppRoutingModule {}

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

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

我以为这就是我所需要做的，但当我加载我的应用程序时，我得到：

ERROR
Error: StaticInjectorError(AppModule)[RouterOutlet -> ChildrenOutletContexts]: 
StaticInjectorError(Platform: core)[RouterOutlet -> ChildrenOutletContexts]: 
NullInjectorError: No provider for ChildrenOutletContexts!

我在谷歌上搜索了这个错误，发现了：但我觉得这些都没有帮助

这是我的stackblitz:

---

不知道下一步要去哪里。

您只需要在应用程序模块导入阵列中将

路由模块

替换为

批准模块

。否则，应用程序将不知道您配置的路由。如果这对您来说是新的，很容易错过。

在您的应用程序模块导入阵列中将

RouterModule

替换为

AppRoutingModule

。@R.Richards这似乎已经做到了。你想创建一个答案，这样我就可以给你评分了吗？