我有一个包含3个输入的表单,其中2个是必需的,而第三个则不是。
我的问题是,当我进入表单页面时,看到不需要的字段处于有效状态,并且已经用绿色着色,即使该字段没有脏污也不被触摸。
>在验证字段/表单之前还是可以做些什么使输入显示为灰色?
这是我在组件中使用的代码:
export class SystemSettingsComponent implements OnInit {
form: FormGroup;
constructor(private formBuilder: FormBuilder) {
this.form = new FormGroup({});
}
ngOnInit() {
this.form = this.formBuilder.group({
serviceName: ['', Validators.required],
serviceDesc: [''],
serviceId: [{value: SystemSettingsComponent.generateId(), disabled: true}, Validators.required]
});
}
static generateId() {
return Math.random().toString(36).substr(2, 9);
}}
还有模板:
<form [formGroup]="form" novalidate>
<div class="row">
<div class="col-lg-4">
<mat-form-field>
<input matInput placeholder="שם השירות" formControlName="serviceName"/>
</mat-form-field>
<mat-form-field>
<textarea matInput placeholder="תיאור השירות" formControlName="serviceDesc"></textarea>
</mat-form-field>
<mat-form-field>
<input matInput class="ltr text-align-left" placeholder="מזהה שירות" formControlName="serviceId"/>
</mat-form-field>
</div>
</div>
<div>
<button mat-raised-button class="mat-raised-button mat-primary" matStepperNext>הבא</button>
</div>
答案 0 :(得分:0)
您可以侦听表单的状态更改,并相应地设置可选表单控件的禁用状态。像这样:
ngOnInit() {
this.form = this.formBuilder.group({
serviceName: ['', Validators.required],
serviceDesc: [{value: '', disabled: true}],
serviceId: [{value: SystemSettingsComponent.generateId(), disabled: true}, Validators.required]
});
this.form.statusChanges.subscribe(status => {
if (status === 'VALID' && this.form.controls.serviceDesc.disabled) {
this.form.controls.serviceDesc.enable();
} else if (status !== 'VALID' && this.form.controls.serviceDesc.enabled) {
this.form.controls.serviceDesc.disable();
}
});
}