我是angularjs4的新手。我正在处理angular-cli.Here我需要在我的组件中获取输入标签的ngModel值。如何在输入字段中输入该值?通过使用该值,我需要编写一个用于显示搜索的过滤器我的页面上的数据。如何在angular4中实现这个? 这是我的app.component.html和app.component.ts文件:
import {
Component
} from '@angular/core';
import {
Http,
Response,
Headers,
RequestOptions
} from '@angular/http';
import 'rxjs/add/operator/map';
@Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css']
})
export class AppComponent {
productsList = '';
show: boolean;
hide: boolean;
listBtn: boolean;
gridBtn: boolean;
values = '';
onKey(event: any) { // without type info
this.values += event.target.value;
console.log("value " + this.values);
}
listView() {
this.gridBtn = true;
this.show = true;
this.hide = false;
this.listBtn = false;
}
gridView() {
this.listBtn = true;
this.gridBtn = false;
this.show = false;
this.hide = true;
}
constructor(private http: Http) {
this.show = false;
this.hide = true;
this.show = false;
this.listBtn = true;
this.gridBtn = false;
this.getData();
}
createAuthorizationHeader(headers: Headers) {
headers.append('Authorization', 'Basic ' +
btoa('ck_543700d9f8c08268d75d3efefb302df4fad70a8f:cs_f1514261bbe154d662eb5053880d40518367c901'));
headers.append("Content-Type", "application/x-www-form-urlencoded");
}
getData() {
console.log('hellooo');
let headers = new Headers();
this.createAuthorizationHeader(headers);
return this.http.get(' https://www.colourssoftware.com/wordpress/wp-json/wc/v2/products', {
headers: headers
})
.subscribe(res => {
const products = res.json();
console.log(products);
this.productsList = products;
console.log(this.productsList);
})
}
}
HTML
<div class="container" align="center">
<div class="row">
<div class="col-sm-6 col-sm-offset-3">
<div class="input-group stylish-input-group">
<input type="text" class="form-control" placeholder="Let's find your product....." (keyup)="onKey($event)">
<span class="input-group-addon">
<button type="submit">
<span class="glyphicon glyphicon-search"></span>
</button>
</span>
</div>
</div>
</div>
<br>
</div>
<br>
<div *ngIf="show">
<ul class="list-group">
<li class="list-group-item" *ngFor="let data of productsList">
<img src="{{data.images[0].src}}" alt="image" width="auto" height="200px">
<span>{{data.name}}</span>
<span>{{data.regular_price}}</span>
</li>
</ul>
</div>
答案 0 :(得分:2)
1.如果您想要单向数据绑定(组件到HTML),请使用 -
<input [ngModel]="variable">
2.如果您想要双向数据绑定(组件到HTML,反之亦然),请使用 -
<input [(ngModel)]="variable">
3.如果您想在使用单向数据绑定时使用html中输入字段中更改的数据,则必须使用(ngModelChange),如下所示:
<input [ngModel]="variable"(ngModelChange)="function_to_fire_on_model_change($event)">
答案 1 :(得分:1)
<强>更新强>
如果你想得到输入值,但是没有ngModel(就像在你的snipet中你没有使用它),你可以这样:
<input type="text" #input class="form-control" placeholder="Let's find your product....." (keyup)="onKey($event, input.value)">
onKey(event, newValue){
console.log(newValue);
console.log(event.key)
}
<小时/> 通常,模式为:
<强> HTML 强>
<input [(ngModel)]="yourModel" ....>
或
<input [ngModel]="yourModel" (ngModelChange)="doSomething($event)"....>
<强>打字稿:强>
yourModel:any;
....
doSomething(event){
console.log(event) // input value is logged
}
此处输入中的任何更改都将更新ngModel,因为它是双向绑定。
答案 2 :(得分:0)
<input [(ngModel)]="name"> // two way data binding
<input [(ngModel)]="name" (ngModelChange)="change()"> // two way data binding with onchange property
<input [ngModel]="name"> // one way data binding
在TS
name: any
答案 3 :(得分:0)
您可以在模板中使用以下行
<input type="text" [(ngModel)]="username" name="username" class="form-control" placeholder="username" >
,在component.ts文件中,您可以通过this.username
来访问元素答案 4 :(得分:0)
如果使用 ngForm,则所有具有 [(ngModel)]=""
的输入字段都必须有一个带值的属性名称:
<input [(ngModel)]="firstname" name="something">