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[英]how to display the array inside an array of objects using ngFor Angular 2
[英]ngFor inside ngFor to display the array inside an array of objects Angular 4
我似乎不明白為什么我的代碼無法正常工作。 我已經閱讀了很多關於SO的文章,我認為我擁有的代碼應該可以工作。 這是我的代碼:
ts文件
import { Component } from '@angular/core';
@Component({
selector: 'my-array',
templateUrl: './array.component.html',
})
export class ArrayComponent {
private content: Test[];
constructor() {
this.content = [{
heading: 'header',
image: 'image',
footerContent: 'footer',
testData: [{
title: 'title1',
content: 'content1'
}, {
title: 'title2',
content: 'content2'
}]
}]
}
}
export class Test {
heading: string;
image: string;
footerContent?: string;
testData: TestItem[];
}
export class TestItem {
title: string;
content: string;
}
html文件
<div *ngFor="let test of content;">
<h2>{{test.heading}}</h2>
<div class="columnOne" id="accordion" role="tablist" aria-multiselectable="true">
<div *ngfor="let item of test.testData;">
<div role="tab" id="headingone">
<h4>
<a role="button" data-toggle="collapse" data-parent="#accordion" href="#collapseone" aria-expanded="true" aria-controls="collapseone">
{{item.title}}
</a>
</h4>
<div id="collapseone" class="panel-collapse collapse in" role="tabpanel" aria-labelledby="headingone">
<div class="panel-body">
{{item.content}}
</div>
</div>
</div>
</div>
</div>
<div>{{test.footerContent}}</div>
</div>
錯誤
An unhandled exception occurred while processing the request.
NodeInvocationException: Template parse errors:
Can't bind to 'ngforOf' since it isn't a known property of 'div'. (" <div class="columnOne" id="accordion" role="tablist" aria-multiselectable="true">
<div [ERROR ->]*ngfor="let item of test.testData;">
<div role="tab" id="headingone">
<"): ng:///ArrayModule/ArrayComponent.html@3:13
Property binding ngforOf not used by any directive on an embedded template. Make sure that the property name is spelled correctly and all directives are listed in the "@NgModule.declarations". ("h2>
<div class="columnOne" id="accordion" role="tablist" aria-multiselectable="true">
[ERROR ->]<div *ngfor="let item of test.testData;">
<div role="tab" id="headingone">
"): ng:///ArrayModule/ArrayComponent.html@3:8
我不知道這是否可以解決整個問題,但是在所有小寫字母*ngfor
輸入的第二個*ngFor
應該是什么? Angular區分大小寫,因此請修復該問題並查看獲得的結果。
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