错误：NG04002：无法匹配任何路由。 URL 段：“学生”

Question

我的路由app-routing.module.ts

import { Component, NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Routes ,RouterModule} from '@angular/router';
import { StudentComponent } from './student/student.component';
import { StudentdetailComponent } from './studentdetail/studentdetail.component';

const routes:Routes=[
{
  path:'student',component:StudentComponent
},
{
  path:'studentdetail',component:StudentdetailComponent
}
];

@NgModule({
  declarations: [],
  imports: [
    CommonModule
  ]
})
export class AppRoutingModule { }

student.component.html

<p>student works!</p>

studentdetail.component.html

<p>studentdetail works!</p>

测试.component.html

 <a [routerLink] ="['/student']">Student</a><br/>
<a [routerLink] ="['/studentdetail']">Student Details</a><br/>

<div>
<router-outlet></router-outlet>
</div>

appmodule.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import {Test} from './test.component';
import { TopComponent } from './top/top.component';
import { AppRoutingModule } from './app-routing.module';
import { StudentComponent } from './student/student.component';
import { StudentdetailComponent } from './studentdetail/studentdetail.component';
import { RouterModule } from '@angular/router';
@NgModule({
  declarations: [
    AppComponent,
    Test,
    TopComponent,
    StudentComponent,
    StudentdetailComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    RouterModule.forRoot([])
  ],
  providers: [],
  bootstrap: [Test]
})
export class AppModule { }

当我单击“学生”和“学生详细信息”链接时。执行 F12 后出现以下错误

未捕获（承诺）：错误：NG04002：无法匹配任何路由。 URL 段：“学生” 错误：NG04002：无法匹配任何路由。 URL 段：'学生'

Answer 1

在您的

AppModule.ts

中，您必须删除此行：

RouterModule.forRoot([])

然后转到您的

app-routing.module.ts

并将此行放入导入/导出中：

imports: [
    CommonModule,
    RouterModule.forRoot(routes)
  ],
  exports: [RouterModule]

然后它应该可以工作。

Answer 2

在您的 app-routing.module.ts 中，您需要将其添加到导入和导出中：

@NgModule({
  declarations: [],
  imports: [
    CommonModule,
    RouterModule.forRoot(routes) // Add this to configure the RouterModule with the routes
  ],
  exports: [RouterModule] // Add this to make sure that the router directives are available elsewhere in the app

Answer 3

将 export 添加到 app-routing.module.ts 中的路由：

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

export const routes:Routes=[
{
  path:'student',component:StudentComponent
},
{
  path:'studentdetail',component:StudentdetailComponent
}
];

@NgModule({
  declarations: [],
  imports: [
    CommonModule
  ],
  exports : [RouterModule]
})

export class AppRoutingModule { }

导入从app-routing.module.ts应用程序模块中导出的路由：

imports: [
    BrowserModule,
    AppRoutingModule,
    RouterModule.forRoot([routes])
],