我尝试根据下拉菜单中选择的值更改表格中的某些单元格,下拉列表中的这些值会随机分配到表格的单元格内。
每个单元格值都有一个指定的类,它等于单元格中的值。我想要它,以便在下拉列表中选择值时,将相关的单元格与更改颜色的值相关联。到目前为止,我有:
app.coponent.html:
<div style="text-align: center">
<app-inputs (event)="getDataFromChild($event)"></app-inputs>
<p></p>
({{ colVal }}) cols and ({{ rowVal }}) rows
<p></p>
<select [(ngModel)]=val (ngModelChange)="value()">
<option value="One">One</option>
<option value="Two">Two</option>
<option value=" Three">Three</option>
<option value="Four">Four</option>
<option value="Five">Five</option>
</select>
<p></p>
<table style="border: 1px solid black;">
<thead>
<tr style="border: 1px solid black;" *ngFor="let row of tableData">
<td style="border: 1px solid black;" *ngFor="let column of row" class="{{ column }}">
{{ column | uppercase }}
</td>
</tr>
</thead>
</table>
app.component.ts:
import { Component, ViewChild, ElementRef } from '@angular/core';
import { NgModel } from '@angular/forms';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
colVal: number;
rowVal: number;
randStr: string;
randVal: any[] = [];
tableData: any[] = [];
randArr: any[] = ['One', 'Two', 'Three', 'Four', 'Five'];
val: string;
getDataFromChild(data) {
this.colVal = data.columns;
this.rowVal = data.rows;
this.getRnd();
}
getDataFromChildTwo(data) {
this.randVal = data;
console.log(this.randVal);
}
getRnd() {
this.tableData = [];
for (let i = 0; i < this.rowVal; i++) {
const values = [];
for (let j = 0; j < this.colVal; j++) {
const randNo = Math.floor(Math.random() * 4);
const storedVal = this.randArr[randNo];
values.push(storedVal);
}
this.tableData.push(values);
console.log(this.tableData);
}
}
value() {
console.log(this.val);
}
}
tl; dr - 我想在下拉列表中更改包含所选选项的单元格的颜色,此刻我有点迷失了!
答案 0 :(得分:0)
模板:
<td style="border: 1px solid black;"
*ngFor="let column of row"
class="{{column}}"
[ngClass]="{'selected': column == val }">
{{ column | uppercase }}
</td>
和css:
td.selected {
background-color: red;
}
修改强>
@ClutchBleu回答您的评论:column == vall
使用column
<select>
值绑定到[(ngModel)]
>