如何在angularjs2中生成表单验证

Question

我试图创建一个从验证这样一种方式，当表单提交无效字段必须用红色突出显示，但我不确定我错了，有人可以帮助我

我的模板,

 <form id="login-form" name="login-form" class="nobottommargin" [formGroup]="form" (ngSubmit)="onSubmit(form.value)">
    <p *ngIf="activation" class="activation">We have sent an activation link to your email</p>
    <div class="form-group col-sm-offset-2">
           <label class="radio-inline">
                <input type="radio"  [formControl]="form.controls['type']" value = 'personal' name="optradio">Personal
            </label>
            <label class="radio-inline">
                <input type="radio"  [formControl]="form.controls['type']" value = 'professional' name="optradio">Professional
            </label>
    </div>
    <div class="form-group">
        <input type="text" [formControl]="form.controls['firstname']" id="login-form-firstnamee" name="login-form-firstname" value="" placeholder="First Name" class="sm-form-control not-dark formcontrolheight required">
   </div>
    <div class="clear"></div>
    <div class="col-sm-12 labeltopmargin nopadding">
        <button class="col-xs-12 button buttonmeroon button-mini   nomargin" id="login-form-submit" name="login-form-submit"  value="login">Sign Up</button>
    </div>
    <div class="clear"></div>
</form>

我ts

,

export class SignUp {
http: Http;
emailfailure: any;
activation: any;
profilefailure: any;
form:any;
constructor(fbld: FormBuilder, http: Http, public router: Router) {
    this.http = http;
    this.form = fbld.group({
        firstname: ['', Validators.required],
        lastname: ['', Validators.required],
        profilename: ['', Validators.required],
        email: ['', Validators.required],
        password: ['', Validators.required],
        repeatpassword: ['', Validators.required],
        image: [''],
        phone: ['', phoneValidator],
        type: ['',],
    }

Answer 1

当你的输入不符合Validator的要求时，你可以使用。ng-invalid类添加到你的输入中。

你也可以根据你的表单状态显示一些错误信息:

<div class="error message" *ngIf="!form.valid">Your message</div>

Answer 2

这是angular 2中简单的表单验证

  <form   #heroForm="ngForm">
     <div class="form-group">
     <label for="name">Name</label>
     <input type="text" class="form-control" id="name"
           required
           [(ngModel)]="info.name" name="name"
           #name="ngModel" >
    <span *ngIf="!name.valid && !name.pristine" style="color:red;">   <span>name is Required</span></span>
  </div>
  <div class="form-group">
    <label for="alterEgo">Alter Ego</label>
    <input type="text" class="form-control" id="alterEgo"
           [(ngModel)]="info.age" name="alterEgo" >
  </div>
  <button type="button" class="btn btn-default" (click)="enter()">ENTER</button>