Angular 2选项(下拉列表) - 如何在变化时获取值,以便可以在函数中使用? [英] Angular 2 select option (dropdown) - how to get the value on change so it can be used in a function?
问题描述
我正在尝试使用一些值构建下拉列表。
I am trying to build a drop down with a few values.
但是,在选择值时,我想进行一个带有id的API调用。
However, on selecting a value, I want to make an API call that takes an id.
在我的component.ts中,我有一系列值:
In my component.ts, I have an array of values:
values = [
{ id: 3432, name: "Recent" },
{ id: 3442, name: "Most Popular" },
{ id: 3352, name: "Rating" }
];
在我的模板中,我使用的数组如下:
In my template, I am using that array as follows:
<select>
<option *ngFor="let v of values" [value]="v">
{{v.name}}
</option>
</select>
但是,从下拉列表中选择一个值时,如何访问 id
属性?我想在我的函数中使用它 getPhotosByType(id)
。
However, on picking a value from the drop down, how can I access the id
property? I want to use that in my function getPhotosByType(id)
.
谢谢
推荐答案
我的答案有点迟,但很简单;但未来可能会帮助别人;
我使用 $ event (目前最新)对4.4.3,5.1 +,6.x和7.x进行了角度测试
My answer is little late but simple; but may help someone in future; I did experiment with angular both 4.4.3, 5.1+, 6.x and 7.x using $event (latest at the moment)
模板:
<select (change)="onChange($event)">
<option *ngFor="let v of values" [value]="v.id">{{v.name}}</option>
</select>
TS
export class MyComponent {
public onChange(event): void { // event will give you full breif of action
const newVal = event.target.value;
console.log(newVal);
}
}
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