获取 angular2 中表单的所有值

我可以使用以下代码获取表单的值：

<input type="text" formControlName="subscriptionFormName" id="subscriptionFormName" #UserName class="form-control" mdbInputDirective>
<button class="btn btn-indigo btn-lg btn-block waves-light" type="button" (click)="OnSubmit(UserName.value)" mdbWavesEffect>Send
    <i class="fa fa-paper-plane-o ml-1"></i>
</button>

但我需要的是获取表单的所有值，这样我就可以这样做：

<button class="btn btn-indigo btn-lg btn-block waves-light" type="button" (click)="OnSubmit(allFormValues)" mdbWavesEffect>Send
    <i class="fa fa-paper-plane-o ml-1"></i>
</button>

user: User;
ObSubmit(values) {
    user.UserName = values.UserName;
    user.Password = values.Password;
    ......
}

下面是整个代码：

<div class="row">
  <div class="col-md-12 text-left">

    <form [formGroup]="subscriptionForm">
      <h3 style="color: gray; text-align: center;">Registration</h3>

      <div class="row">
        <div class="col-md-6">
          <div class="md-form">
            <i class="fa fa-user prefix grey-text"></i>
            <input type="text" formControlName="UserName" id="UserName" class="form-control" mdbInputDirective>
            <label for="UserName">Your UserName</label>
          </div>
          <br>
          <div class="md-form">
            <i class="fa fa-user prefix grey-text"></i>
            <input type="text" formControlName="FirstName" id="FirstName" class="form-control" mdbInputDirective>
            <label for="FirstName">Your First name</label>
          </div>
        </div>
        <div class="col-md-6">
          <div class="md-form">
            <i class="fa fa-user-secret prefix grey-text"></i>
            <input type="password" id="Password" formControlName="Password" class="form-control" mdbInputDirective>
            <label for="Password">Your password</label>
          </div>
          <br>
          <div class="md-form">
            <i class="fa fa-user-user prefix grey-text"></i>
            <input type="text" id="LastName" formControlName="LastName" class="form-control" mdbInputDirective>
            <label for="LastName">Your Last name</label>
          </div>
        </div>
      </div>
      <br>
      <div class="row">
        <div class="col-md-12">
          <div class="md-form">
            <i class="fa fa-envelope prefix grey-text"></i>
            <input type="email" id="Email" formControlName="Email" class="form-control" mdbInputDirective>
            <label for="Email">Your Email</label>
          </div>
          <br>
          {{subscriptionForm.value|json}}
          <br>
          <div class="text-center">
            <button class="btn btn-indigo btn-lg btn-block waves-light" type="button" (click)="OnSubmit()" mdbWavesEffect>Send
              <i class="fa fa-paper-plane-o ml-1"></i>
            </button>
          </div>
        </div>
      </div>
    </form>

  </div>
</div>

import { User } from './../../shared/user.model';
import { Component, OnInit } from '@angular/core';
import { FormGroup, FormBuilder, Validators } from '@angular/forms';

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

  constructor(private fb: FormBuilder) {
    this.subscriptionForm = fb.group({
      UserName: ['', Validators.required],
      Password: ['', Validators.required],
      Email:    ['', Validators.required, Validators.email],
      FirstName: ['', Validators.required],
      LastName: ['', Validators.required]
    });
  }

  ngOnInit() {
  }

  OnSubmit() {
   this.user = this.subscriptionForm.value;
   console.log(this.user);
  }

}

当我使用#subscriptionForm="ngForm"我收到一个错误。可能是因为[formGroup]="subscriptionForm"。我不知道什么是反应形式或其他形式。之后我会研究这个，但是你能帮我吗？谢谢。

接受的答案已经过时，并且不再适用于 Angular 8+，这可以很好地获取您的所有值：

for (const field in this.myForm.controls) { // 'field' is a string
  console.log(this.myForm.controls[field].value);
}