ModuleWithProviders的Angular 2路由错误

Question

我是Angular 2的新手,我需要路由部分的帮助.我正在使用http://jasonwatmore.com/post/2016/09/29/angular-2-user-registration-and-login-example-tutorial

我收到了一个错误

导出变量'routing'已经或正在使用来自外部模块"/ home/frank/angular/node_modules/@ angular/core/src/metadata/ng_module"的名称'ModuleWithProviders',但无法命名.

这是我的代码

import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule }    from '@angular/forms';
import { HttpModule } from '@angular/http';

// used to create fake backend
import { fakeBackendProvider } from './_helpers/index';
import { MockBackend, MockConnection } from '@angular/http/testing';
import { BaseRequestOptions } from '@angular/http';

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

import { AlertComponent } from './_directives/index';
import { AuthGuard } from './_guards/index';
import { AlertService, AuthenticationService, UserService } from './_services/index';
import { HomeComponent } from './home/index';
import { LoginComponent } from './login/index';
import { RegisterComponent } from './register/index';

@NgModule({
    imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    routing
 ],
declarations: [
AppComponent,
AlertComponent,
HomeComponent,
LoginComponent,
RegisterComponent
],
providers: [
    AuthGuard,
    AlertService,
    AuthenticationService,
    UserService,

    // providers used to create fake backend
    fakeBackendProvider,
    MockBackend,
    BaseRequestOptions
],
bootstrap: [AppComponent]
})

 export class AppModule { }

关于错误的任何想法？我还尝试了来自'@ angular/core'的seimport {ModuleWithProviders};我的"声明":在tsconfig.js中也是真的,也是导入的

Answer 1

我解决了这个问题:

export const routing: ModuleWithProviders = RouterModule.forRoot(APP_ROUTES);

并且不要忘记从@ angular/core导入ModuleWithProviders

import { ModuleWithProviders } from "@angular/core";