無法在我的 angular 項目中使用 formGroup

Question

我嘗試在我的 angular 項目中使用 formGroup，但它返回錯誤：

無法綁定到“formGroup”，因為它不是“form”的已知屬性。

我已將 FormsModule 和 ReactiveFormsModule 導入到我的 auth.module 和 app.module 中，但我似乎無法解決我的錯誤。 我希望有人會好心幫助我，拜托。

HTML

<form [formGroup]="form" (submit)="submit()">
    <div class="input-field">
        <input id="username" formControlName="username" type="text" required>
        <label for="username">Username</label>
    </div>
    <div class="input-field">
        <input id="email" formControlName="email" type="text" required>
        <label for="email">Email</label>
    </div>
    <div class="input-field">
        <input id="password" formControlName="password" type="password" required>
        <label for="password">Mot de passe</label>
    </div>
    <div class="button-form">
        <button class="custom-btn btn-sign-in" type="submit">S'inscire</button>
    </div>
</form>

認證模塊

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';

import { LoginComponent } from './login/login.component';
import { RegisterComponent } from './register/register.component';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';


@NgModule({
  declarations: [
    LoginComponent,
    RegisterComponent
  ],
  imports: [
    CommonModule,
    HttpClientModule,
    FormsModule,
    ReactiveFormsModule
  ],
})
export class AuthModule { }

應用模塊

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';

import { AppRoutingModule, routingComponents } from './app-routing.module';
import { AppComponent } from './app.component';
import { HttpClientModule, HttpClient, HTTP_INTERCEPTORS } from '@angular/common/http';
import { MainComponent } from './pages/main/main.component';
import { CommonModule } from '@angular/common';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';

@NgModule({
  declarations: [
    AppComponent,
    routingComponents,
    MainComponent
  ],
  imports: [
    CommonModule,
    BrowserModule,
    AppRoutingModule,
    HttpClientModule,
    FormsModule,
    ReactiveFormsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

注冊.component

import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormGroup, FormControl, Validators} from '@angular/forms';
import { Router } from '@angular/router';

@Component({
  selector: 'app-register',
  templateUrl: './register.component.html',
  styleUrls: ['./register.component.scss']
})
export class RegisterComponent implements OnInit {

  form: FormGroup;

  constructor(
    private router: Router,
    private formBuilder: FormBuilder
  ) { }

  ngOnInit(): void {
    this.form = this.formBuilder.group({
      username: '',
      email: '',
      password: ''
    });
  }

  submit(): void{
    console.log(this.form.getRawValue());
  }

  btnClick() {
    this.router.navigate(['/login']);
  }
}

Answer 1

這可能是一個導入問題：如果您在另一個模塊中使用RegisterComponent ，請務必將RegisterComponent添加到AuthModule的導出中

另外值得注意的是，將FormsModule和ReactiveFormsModule導入AppModule使其在整個應用程序中可用