我的FormGroup带有一些FormControl,并且它们都是必需的,但是我只想在我的component.ts中的布尔值为true时才需要两个FormControles,但我尝试了ng-required="myboolean"
,但这没有用。
有没有办法做到这一点或解决方法?
//编辑
onButtonClick()
{
this.passwordFormControl = !this.passwordFormControl;
if(this.passwordFormControl)
{
this.passwortButton = "Cancle change Password";
this.benutzerAnlageForm.get('password').setValidators(Validators.required);
}
else
{
this.passwortButton = "Change password";
this.benutzerAnlageForm.get('password').clearValidators();
}
}
<form [formGroup]="MyForm" (ngSubmit)="onMyForm()">
<div *ngIf="passwordFormControl" class = "form-group">
<label for="password">Password</label>
<input formControlName="password" type="password" id="password"
<-- Some more Form Controles that are always required -->
<button type="submit" [disabled]="!MyForm.valid" class ="btn btn-primary">Save</button>
<button *ngIf="edit" type="button" class="btn btn-primary" (click)="onButtonClick()">{{passwortButton}}</button>
</form>
密码FormControl是我并不总是需要的控件。问题是如果我从密码FormControl中删除了所需的表单本身,而Button似乎无法识别该表单现在又有效了。
最佳答案
对于AngularJs,ng-required是1.x。对于Angular或Angular 2+,您可以执行以下操作:
<input [required]="myboolean">
您还可以在布尔值更改时在component.ts中动态执行此操作,如下所示:
this.form.get('control-name').setValidators(Validators.required);
this.form.get('control-name').updateValueAndValidity();
去除:
this.form.get('control-name').clearValidators();
this.form.get('control-name').setValidators(/*Rest of the validators if required*/);
this.form.get('control-name').updateValueAndValidity();