angular4.0 ERROR Error: Uncaught (in promise): Error: No provider for AuthGuard! Error: No provider

使用angular4.0，开发路由守卫的时候，报一下错误

ERROR Error: Uncaught (in promise): Error: No provider for AuthGuard!
Error: No provider for AuthGuard!

1、首先确认，在文件中，已经加载

import { AuthGuard } from '../auth-guard.service';


const adminRoutes: Routes = [
	{
		...
		canActivate: [AuthGuard],
		...
	}
]

import { AuthGuard } from './auth-guard.service';

@NgModule({
	...
	providers: [
		...
		AuthGuard
	]
})

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