我正在尝试在我的Angular 2项目中使用Angular Material Autocomplete组件。我将以下内容添加到模板中。
<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>
下面是我的组件。
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;
}
}
我得到如下错误。看起来好像没有找到formControl指令。
不能绑定到'formControl'因为它不是'input'的已知属性
这里的问题是什么?
对我来说有用的是在@component({})的模板中构建表单，例如——
import { Component, OnInit } from '@angular/core';
import { FormControl } from '@angular/forms';
@Component({
selector: 'app-contact-form',
template:`
<form class="validation-form" validate method="createUserWithEmailAndPassword">
<div class="form-row">
<div class="col-md-6 mb-3">
<label for="firstName">First name</label>
<input type="text" [formControl]="firstName" id="firstName" placeholder="Please enter your first name" required>
<div class="valid-feedback">
Looks good!
</div>
</div>
<div class="col-md-6 mb-3">
<label for="lastName">Last name</label>
<input type="text" [formControl]="lastName" id="lastName" placeholder="Please enter your last name" required>
<div class="valid-feedback">
Looks good!
</div>
</div>
</div>
<div class="form-row">
<div class="col-md-6 mb-3">
<label for="email">Email address</label>
<input type="email" [formControl]="email" id="email" aria-describedby="emailHelp" placeholder="Please enter your last name" required>
<small id="emailHelp" class="form-text text-muted">We'll never share your email with anyone else.</small>
<div class="valid-feedback">
Looks good!
</div>
</div>
</div>
<div class="col-md-6 mb-3">
<label for="password">Password</label>
<input type="password" [formControl]="password" id="password" placeholder="Please enter your password" required>
<div class="valid-feedback">
Looks good!
</div>
</div>
<div class="col-md-3 mb-3">
<label for="zip">Zip</label>
<input type="text" [formControl]="zip" id="zip" required>
<div class="invalid-feedback">
Please provide a valid zip.
</div>
</div>
</div>
<div class="form-group">
<div class="form-check">
<input class="form-check-input" type="checkbox" value="" id="invalidCheck" required>
<label class="form-check-label" for="invalidCheck">
Agree to terms and conditions
</label>
<div class="invalid-feedback">
You must agree before submitting.
</div>
</div>
</div>
<button class="btn btn-primary" type="submit">Submit form</button>
</form>`,
templateUrl: './contact-form.component.html',
styleUrls: ['./contact-form.component.scss']
})
export class ContactFormComponent implements OnInit {
firstName = new FormControl('');
lastName = new FormControl('');
email = new FormControl('');
password = new FormControl('');
constructor() { }
ngOnInit(): void {
}
}
这停止显示错误。如果错误仍然存在，那么这可以为您解决问题
