Angular - RouteParams

Question

我目前正在测试Angular Alpha 45,特别是路由,并通过使用参数实现路由来解决问题.我已经为一个特定实体的详细视图创建了一个组件.

@Component({
    templateUrl: 'app/components/projekt/projekt.detail.html',
    directives: [FORM_DIRECTIVES]
})
export class ProjektDetailComponent {
    id: string;
    constructor(params: RouteParams){
        this.id = params.get('id');
    }   
}

模板看起来像这样,只显示参数"id": <h1>Projekt Details: {{id}}</h1> RouteConfig如下所示:

@RouteConfig([
  { path: '/', component: StartComponent, as:'Start'} ,
  { path: '/projekte', component: ProjektOverviewComponent, as:'Projekte'},
  { path: '/projekte/:id', component: ProjektDetailComponent, as:'ProjektDetail'},
  { path: '/projekte/neu', component: NeuesProjektComponent, as:'ProjektNeu'}    
])

上面显示的Link和RouteConfig与角度文档中的示例类似. <a [router-link]="['/ProjektDetail', {'id': '1'}]" class="btn btn-default">Details</a>

因此,当我导航到详细视图(例如127.0.0.1:8080/src/#/projekte/1)时,我收到以下错误,该错误显示在浏览器的控制台中(我已经使用Edge,Firefox 42进行了测试, Chrome 46):

EXCEPTION: Cannot resolve all parameters for ProjektDetailComponent(?). Make sure they all have valid type or annotations.


    18:25:41.376 EXCEPTION: Cannot resolve all parameters for ProjektDetailComponent(?). Make sure they all have valid type or    annotations.1 angular2.dev.js:21984:9
BrowserDomAdapter</BrowserDomAdapter.prototype.logError() angular2.dev.js:21984
BrowserDomAdapter</BrowserDomAdapter.prototype.logGroup() angular2.dev.js:21995
ExceptionHandler</ExceptionHandler.prototype.call() angular2.dev.js:4426
PlatformRef_</PlatformRef_.prototype._initApp/</<() angular2.dev.js:19685
NgZone</NgZone.prototype._notifyOnError() angular2.dev.js:10746
NgZone</NgZone.prototype._createInnerZone/errorHandling.onError() angular2.dev.js:10654
run() angular2.dev.js:141
NgZone</NgZone.prototype._createInnerZone/<.$run/<() angular2.dev.js:10669
zoneBoundFn() angular2.dev.js:111
lib$es6$promise$$internal$$tryCatch() angular2.dev.js:1507
lib$es6$promise$$internal$$invokeCallback() angular2.dev.js:1519
lib$es6$promise$$internal$$publish() angular2.dev.js:1490
[4]</</</<() angular2.dev.js:219
NgZone</NgZone.prototype._createInnerZone/<.$scheduleMicrotask/</microtask() angular2.dev.js:10701
run() angular2.dev.js:138
NgZone</NgZone.prototype._createInnerZone/<.$run/<() angular2.dev.js:10669
zoneBoundFn() angular2.dev.js:111
lib$es6$promise$asap$$flush() angular2.dev.js:1301

你有什么建议吗？

Answer 1

正如@EricMartinez所提到的,你必须正确导入RouteParams.我正在玩我的plunker并得到完全相同的错误.

我意识到我正在从中导入'angular2/angular2'并需要从中导入'angular2/router'

这是一个完全符合您要求但具有"汽车"组件的掠夺者.Plunker