无法绑定到“formControl",因为它不是“输入"的已知属性 - Angular2 Material Autocomplete 问题 [英] Can't bind to 'formControl' since it isn't a known property of 'input' - Angular2 Material Autocomplete issue
本文介绍了无法绑定到“formControl",因为它不是“输入"的已知属性 - Angular2 Material Autocomplete 问题的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试在我的 Angular 2 项目中使用 Angular Material Autocomplete 组件.我在模板中添加了以下内容.
I am trying to use Angular Material Autocomplete component in my Angular 2 project. I added the following to my template.
<md-input-container>
<input mdInput placeholder="Category" [mdAutocomplete]="auto" [formControl]="stateCtrl">
</md-input-container>
<md-autocomplete #auto="mdAutocomplete">
<md-option *ngFor="let state of filteredStates | async" [value]="state">
{{ state }}
</md-option>
</md-autocomplete>
以下是我的组件.
import {Component, OnInit} from "@angular/core";
import {ActivatedRoute, Router} from "@angular/router";
import {FormControl} from "@angular/forms";
@Component({
templateUrl: './edit_item.component.html',
styleUrls: ['./edit_item.component.scss']
})
export class EditItemComponent implements OnInit {
stateCtrl: FormControl;
states = [....some data....];
constructor(private route: ActivatedRoute, private router: Router) {
this.stateCtrl = new FormControl();
this.filteredStates = this.stateCtrl.valueChanges.startWith(null).map(name => this.filterStates(name));
}
ngOnInit(): void {
}
filterStates(val: string) {
return val ? this.states.filter((s) => new RegExp(val, 'gi').test(s)) : this.states;
}
}
我收到以下错误.似乎没有找到 formControl
指令.
I'm getting the following error. It looks like the formControl
directive is not being found.
无法绑定到formControl",因为它不是input"的已知属性
Can't bind to 'formControl' since it isn't a known property of 'input'
这里有什么问题?
推荐答案
在使用 formControl
时,您必须将 ReactiveFormsModule
导入到您的 imports
数组.
While using formControl
, you have to import ReactiveFormsModule
to your imports
array.
示例:
import {FormsModule, ReactiveFormsModule} from '@angular/forms';
@NgModule({
imports: [
BrowserModule,
FormsModule,
ReactiveFormsModule,
MaterialModule,
],
...
})
export class AppModule {}
这篇关于无法绑定到“formControl",因为它不是“输入"的已知属性 - Angular2 Material Autocomplete 问题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!
查看全文