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我有以下angular2應用程序注入簡單的依賴關係，它不起作用。我錯過了什麼？Angular2簡單的DI不工作
這裏的錯誤：
EXCEPTION: Cannot resolve all parameters for 'AppComponent'(?). Make sure that all the parameters are decorated with Inject or have valid type annotations and that 'AppComponent' is decorated with Injectable.
，代碼：
import {Component} from 'angular2/core';
import {bootstrap} from 'angular2/platform/browser';
class DataService {
items: Array<any>;
constructor() {
this.items = [
{ name: 'Christoph Burgdorf' },
{ name: 'Pascal Precht' },
{ name: 'thoughtram' }
];
}
getItems() {
return this.items;
}
}
@Component({
selector: 'app',
providers: [DataService],
template: `
<ul>
<li *ngFor="#item of items">{{item.name}}</li>
</ul>
`
})
class AppComponent {
items: Array<any>;
constructor(dataService: DataService) {
this.items = dataService.getItems();
}
}
bootstrap(AppComponent, []);
你'DataService'和'AppComponent'在同一個文件，並在文件中相同的順序？ –
其全部一個文件 – Tucker
並且以相同的順序？ –