如何在Angular 2中将组件导入另一个根组件 [英] How to import component into another root component in Angular 2

问题描述

我正在尝试从一个文件导入另一个根组件文件. 它给出错误为..

I am trying to import component from one file another root component file. it give error as ..

zone.js:484未处理的承诺拒绝:模板解析错误: 课程"不是已知的元素: 1.如果"courses"是Angular组件，则确认它是该模块的一部分. 2.如果"courses"是Web组件，则将"CUSTOM_ELEMENTS_SCHEMA"添加到该组件的"@ NgModule.schema"以禁止显示此消息. ("

我的第一个Angular 2应用

[ERROR->]"):AppComponent @ 0:31;区域:；任务:Promise.then;值:错误:模板解析错误:(…)错误:模板解析错误: 课程"不是已知元素:

zone.js:484 Unhandled Promise rejection: Template parse errors: 'courses' is not a known element: 1. If 'courses' is an Angular component, then verify that it is part of this module. 2. If 'courses' is a Web Component then add "CUSTOM_ELEMENTS_SCHEMA" to the '@NgModule.schema' of this component to suppress this message. ("

My First Angular 2 App

[ERROR ->]"): AppComponent@0:31 ; Zone: ; Task: Promise.then ; Value: Error: Template parse errors:(…) Error: Template parse errors: 'courses' is not a known element:

我的app.component.ts像[根组件文件]

My app.component.ts be like [root component file]

import { Component } from '@angular/core';
import {CoursesComponent} from './courses.component';

@Component({
  selector: 'my-app',
  template: '<h1>My First Angular 2 App</h1><courses></courses>',
  directives:[CoursesComponent],
})

export class AppComponent { }

和我的course.component.ts是;

and my courses.component.ts be ;

import { Component } from '@angular/core';
@Component({
  selector: 'courses',
  template: '<h1>courses</h1>'
})
export class CoursesComponent { }

从app.component内的courses.component.ts文件导入课程组件时，我无法在@Component{}

while importing courses component from courses.component.ts file inside app.component i am not able declare directive inside @Component{}

directives:[CoursesComponent]给我错误

请提出解决方案.

推荐答案

您应使用 declarations array(meta property) of @NgModule 进行声明，如下所示(RC5 and later)，

import {CoursesComponent} from './courses.component';

@NgModule({
  imports:      [ BrowserModule],
  declarations: [ AppComponent,CoursesComponent],  //<----here
  providers:    [],      
  bootstrap:    [ AppComponent ]
})

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