我想将我的json-array转换为我创建的界面,并希望在浏览器中显示它。我认为我的界面可能有问题,但我无法弄明白......我需要更改什么来让我的代码运行?
接口:
export interface Video {
id: number;
name: string;
description: string;
createdAt: string;
}
app.ts
import {JSONP_PROVIDERS, Jsonp} from '@angular/http';
import {Observable} from '../../../node_modules/rxjs';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/share';
import {Video} from './networking/api';
private videoData: Observable<Video[]>;
ngOnInit() {
this.displayNewstVideo(10);
}
private displayNewstVideo(count: number) {
this.videoData = this.jsonp
.get('localhost:8080/video/newst/' + count + '?jsonp=JSONP_CALLBACK')
.map(res => (res.json() as Video[]));
alert(this.videoData.count);
}
app.html
<div class="container">
<div class="video" style="font-family:sans-serif" *ngFor="#entry of videoData | async; #i = index">
<br *ngIf="i > 0" />
<span class="title" style="font-size:1.2rem">
<span>{{i + 1}}. </span>
<a href={{entry.urlDesktop}}>{{entry.name}}</a>
</span>
<span> ({{entry.description}})</span>
<div>Submitted at {{entry.createdAt * 1000 | date:"mediumTime"}}.</div>
</div>
JSON
[{
id: 1,
name: "Some Name",
description: "BlaBla",
createdAt: "2016-05-04 13:30:01.0",
},
{
id: 2,
name: "Some Name",
description: "BlaBla",
createdAt: "2016-05-04 13:30:01.0",
}]
编辑
未捕获的EXCEPTION:app / html / app.html中的错误:27:11原始异常:RangeError:提供的日期不在有效范围内。 ORIGINAL STACKTRACE:RangeError:提供的日期不在有效范围内。在位于DebugAppView.AppView.detectChanges的DebugAppView._View_AppComponent1.detectChangesInternal(AppComponent.template.js:377:148)的eval(http://localhost:3000/node_modules/@angular/common/src/facade/intl.js:100:26)的DatePipe.transform(http://localhost:3000/node_modules/@angular/common/src/pipes/date_pipe.js:25:37)的Function.DateFormatter.format(http://localhost:3000/node_modules/@angular/core/src/linker/view_utils.js:188:22)的boundformat(native)处( http://localhost:3000/node_modules/@angular/core/src/linker/view.js:200:14)位于DebugAppView.AppView.detectChanges(调试版)的DebugAppView.AppView.detectChanges内部(AppComponent.template.js:198:8)DebugAppView.AppView.detectChildrenChanges(http://localhost:3000/node_modules/@angular/core/src/linker/view.js:289:44)上的DebugAppView.detectChanges(http://localhost:3000/node_modules/@angular/core/src/linker/view.js:215:37)错误上下文:[object object] ]
您可以尝试以下方式:
http://localhost:3000/node_modules/@angular/core/src/linker/view.js:200:14
编辑
我认为您的请求不会返回JSONP内容,而是返回JSONP内容(JSON)。如果是这样,您可以尝试以下方法:
this.videoData = this.jsonp
.get('localhost:8080/video/newst/' + count +
'?jsonp=JSONP_CALLBACK')
.map(res => <Video[]>res.json();
尝试使用类而不是接口,所以在这种情况下video.model.ts将是:
import { bootstrap } from 'angular2/platform/browser';
import { Component } from 'angular2/core';
import { HTTP_PROVIDERS, Http } from 'angular2/http';
import "rxjs/add/operator/map";
@Component({
selector: "app",
templateUrl: "app.html",
providers: [HTTP_PROVIDERS]
})
class App {
private feedData: Observable<Video[]>;
constructor(private http: Http) { }
ngOnInit() {
this.displayNewstVideo(10);
}
private displayNewstVideo(count: number) {
this.videoData = this.http
.get('localhost:8080/video/newst/' + count)
.map(res => (res.json() as Video[]))
.do(videoData => {
console.log(videoData);
});
}
}
bootstrap(App);
我最近做了一个TypeScript的演示,这让我想起幻灯片的标题是什么“没有界面!”在TypeScript中定义export class Video {
constructor(
public id: number,
public name: string,
public description: string,
public createdAt: string){}
}
时,它实际上会编译为空。这可能有点误导。我想我明白你要做的是:
问题是JSON对象返回的方式,它是填充的。因此它位于指数qazxsw poi中。试试这个:
interface