angular - 类型 'nome' 上不存在属性 'FormGroup'

Question

我有一个 Angular 应用程序，我在通过 ReactiveForms 进行表单验证时遇到了一些问题，我遇到了以下错误:

ng 服务错误:

src/app/pages/contact/contact.component.ts(48,32): error TS2339: Property 'assunto' does not exist on type 'FormGroup'. src/app/pages/contact/contact.component.ts(50,57): error TS2339: Property 'assunto' does not exist on type 'FormGroup'. src/app/pages/contact/contact.component.ts(51,30): error TS2339: Property 'nome' does not exist on type 'FormGroup'. src/app/pages/contact/contact.component.ts(52,33): error TS2339: Property 'empresa' does not exist on type 'FormGroup'. src/app/pages/contact/contact.component.ts(53,32): error TS2339: Property 'email' does not exist on type 'FormGroup'. src/app/pages/contact/contact.component.ts(54,34): error TS2339: Property 'telefone' does not exist on type 'FormGroup'.

contact.component.html

<form class="col-s4 dados-form" [formGroup]="dadosForm">

<mat-form-field style="width:100%" class="full-width">
  <input matInput placeholder="Nome" formControlName="nome" required>
  <mat-error *ngIf="dadosForm.get('nome').dirty || dadosForm.get('nome').touched">
    O campo nome deve ser preenchido</mat-error>
</mat-form-field> <br>

<mat-form-field style="width:100%" class="full-width">
  <input matInput placeholder="Empresa" formControlName="empresa" required>
  <mat-error
    *ngIf="dadosForm.get('empresa').dirty || dadosForm.get('empresa').touched">
    O campo empresa deve ser preenchido</mat-error>
</mat-form-field> <br>

<mat-form-field style="width:100%" class="full-width">
  <input matInput placeholder="E-Mail" formControlName="email" required>
  <mat-error
    *ngIf="dadosForm.get('email').dirty || dadosForm.get('email').touched">
    {{getMailErrorMessage()}}</mat-error>
</mat-form-field> <br>
<mat-form-field style="width:100%" class="full-width">
  <input matInput maxlength="15" id="phoneInput" formControlName="telefone" [mask]="phoneMask" placeholder="Telefone para Contato" required />
  <mat-error
    *ngIf="dadosForm.get('telefone').dirty || dadosForm.get('telefone').touched">
    O campo telefone deve ser preenchido</mat-error>
</mat-form-field> <br>

<mat-form-field style="width:100%" class="full-width">
  <mat-label>Produto Desejado</mat-label>
  <mat-select matInput formControlName="assunto" required>
    <mat-optgroup *ngFor="let categoria of produtos" [label]="categoria.key">
      <mat-option *ngFor="let produto of categoria.value" [value]="produto">
        {{produto}}
      </mat-option>
    </mat-optgroup>
  </mat-select>
  <mat-error
    *ngIf="dadosForm.get('assunto').dirty || dadosForm.get('assunto').touched">
    O campo assunto deve ser preenchido</mat-error>
</mat-form-field><br>

<mat-form-field style="width:100%" class="full-width">
  <textarea matInput placeholder="Mensagem" formControlName="mensagem" required></textarea>
  <mat-error
    *ngIf="dadosForm.get('mensagem').dirty || dadosForm.get('mensagem').touched">
    O campo mensagem deve ser preenchido</mat-error>
</mat-form-field><br>

<div class="form-buttons">
  <button mat-button mat-raised-button id="submitButton" [disabled]="!dadosForm.valid" matTooltip="" color="primary" (click)="sendMail(mensagem)">Enviar</button>
</div>

</form>

contact.component.ts

  dadosForm = new FormGroup({
    nome: new FormControl('', [Validators.required]),
    empresa: new FormControl('', [Validators.required]),
    email: new FormControl('', [Validators.required, Validators.email]),
    telefone: new FormControl('', [Validators.required]),
    assunto: new FormControl('', [Validators.required]),
    mensagem: new FormControl('', [Validators.required])
  });

Answer 1

<div *ngIf="f.name.invalid && f.name.touched">
                                <small class="text-danger" *ngIf="f.name.errors?.required">Please enter the name!</small>
                            </div>

在ts文件中

get f() { return this.form.controls; }