使用ngFor遍历二维数组 [英] Using an ngFor to traverse a 2 dimensional array

问题描述

一段时间以来，我一直在头顶上撞墙，但我终于感觉很近了.我想做的是读取我的测试数据，该数据进入二维数组，并将其内容打印到html中的表中，但是我不知道如何使用ngfor遍历该数据集

I've been beating my head up against the wall on this one for a while but I finally feel close. What I'm trying to do is read my test data, which goes to a two dimensional array, and print its contents to a table in the html, but I can't figure out how to use an ngfor to loop though that dataset

这是我的打字稿文件

import { Component } from '@angular/core';
import { Http } from '@angular/http';

@Component({
    selector: 'fetchdata',
    template: require('./fetchdata.component.html')
})
export class FetchDataComponent {
    public tableData: any[][];

    constructor(http: Http) {

        http.get('/api/SampleData/DatatableData').subscribe(result => {
            //This is test data only, could dynamically change
            var arr = [
                { ID: 1, Name: "foo", Email: "[e-mail]" },
                { ID: 2, Name: "bar", Email: "[e-mail]" },
                { ID: 3, Name: "bar", Email: "[e-mail]" }
            ]
            var res = arr.map(function (obj) {
                return Object.keys(obj).map(function (key) {
                    return obj[key];
                });
            });

            this.tableData = res;
            console.log("Table Data")
            console.log(this.tableData)
        });
    }
}

这是我目前无法使用的html

Here is my html which does not work at the moment

<p *ngIf="!tableData"><em>Loading...</em></p>

<table class='table' *ngIf="tableData">
    <tbody>
        <tr *ngFor="let data of tableData; let i = index">
            <td>
            {{ tableData[data][i] }}
            </td>

        </tr>
    </tbody>
</table>

这是我的console.log(this.tableData)的输出

我的目标是在表格中将其格式化为这样

My goal is to have it formatted like this in the table

1 | foo | [e-mail]
2 | bar | [e-mail]

最好不要使用模型或接口，因为数据是动态的，它可能随时更改.有谁知道如何使用ngfor遍历二维数组并将其内容打印在表中?

Preferably I'd like to not use a model or an interface because the data is dynamic, it could change at any time. Does anyone know how to use the ngfor to loop through a two dimensional array and print its contents in the table?

推荐答案

像 Marco Luzzara 所说，你有为嵌套数组使用另一个* ngFor.

Like Marco Luzzara said, you have to use another *ngFor for the nested arrays.

我回答这个只是为了给您一个代码示例:

I answer this just to give you a code example:

<table class='table' *ngIf="tableData">
    <tbody>
        <tr *ngFor="let data of tableData; let i = index">
            <td *ngFor="let cell of data">
              {{ cell }}
            </td>
        </tr>
    </tbody>
</table>

这篇关于使用ngFor遍历二维数组的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！