如何使用 ngFor 访问 HTML 文件中一个大对象内的多个对象的值？

Question

在 angular 中，我试图在 html 文件中使用 *ngFor 来访问嵌套对象值。我尝试访问的对象serverData如下。

{//whole object i try to loop through and access
  "0": {//inner , nested object that store the data I want to access 
    "District_en": "Sha Tin",
    "Name_en": "This will be the new name",
    "Address_en": "Kwei Tei Street, Fo Tan, Sha Tin",
    "Facilities_en": "2 barbecue pits",
  },
  "1": {
    "District_en": "Sha Tin",
    "Name_en": "Lok Shun Path Barbecue Area",
    "Address_en": "Lok Shun Path, Sha Tin",
    "Facilities_en": "6 barbecue pits",
  }
}

我正在尝试打印出每个“索引”对象中的每个属性。
在 html 中使用以下代码。就像遍历整个对象并打印出每个属性值。

 <tr *ngFor="let index of serverData |  keyvalue ">
     <td>{{index.value.District_en}}</td>
     <td>{{index.value.Name_en}}</td>
     <td>{{index.value.Address_en}}</td>
     <td>{{index.value.Facilities_en}}</td>
 </tr>

但出现错误 Object is of type 'unknown'。
我发现了类似的问题，但大多数是关于访问多个对象。
变成一个物体里面有多个物体的情况，我的大脑就停止工作了...
提前致谢。

Answer 1

你可以像下面那样做。

app.component.ts

import { Component, OnInit } from '@angular/core';

interface ServerData {
  District_en: string;
  Name_en: string;
  Address_en: string;
  Facilities_en: string;
}

@Component({
  selector: 'my-app',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css'],
})
export class AppComponent implements OnInit {
  serverData: Record<string, ServerData>;

  ngOnInit() {
    this.serverData = {
      //whole object i try to loop through and access
      '0': {
        //inner , nested object that store the data I want to access
        District_en: 'Sha Tin',
        Name_en: 'This will be the new name',
        Address_en: 'Kwei Tei Street, Fo Tan, Sha Tin',
        Facilities_en: '2 barbecue pits',
      },
      '1': {
        District_en: 'Sha Tin',
        Name_en: 'Lok Shun Path Barbecue Area',
        Address_en: 'Lok Shun Path, Sha Tin',
        Facilities_en: '6 barbecue pits',
      },
    };
  }
}

app.component.html

<tr *ngFor="let index of serverData | keyvalue">
  <td>{{ index.value.District_en }}</td>
  <td>{{ index.value.Name_en }}</td>
  <td>{{ index.value.Address_en }}</td>
  <td>{{ index.value.Facilities_en }}</td>
</tr>

它在 UI

上正确呈现

Working Demo

如有任何疑问，请告诉我。

注意：更新了 ts 代码

如何使用 ngFor 访问 HTML 文件中一个大对象内的多个对象的值？

How to use ngFor to access multiple object's value that is inside one big object in an HTML file?

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angular

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