Angular 7:如何将文件/图像与我的反应式表单一起提交？

import { FormBuilder, FormGroup } from '@angular/forms';

@Component({
  selector: 'app-file-upload',
  templateUrl: './file-upload.component.html',
  styleUrls: ['./file-upload.component.css']
})
export class FileUploadComponent {
  fileForm: FormGroup;

  constructor(private formBuilder: FormBuilder) {
    this.fileForm = this.formBuilder.group({
      file: ['']
    });
  }

  onSubmit() {
    // 处理提交逻辑
    const formData = new FormData();
    formData.append('file', this.fileForm.get('file').value);

    // 发送HTTP请求
    // 你可以使用Angular的HttpClient来发送HTTP请求，将文件/图像上传到服务器。
  }
}

<form [formGroup]="fileForm" (ngSubmit)="onSubmit()">
  <input type="file" formControlName="file">
  <button type="submit">提交</button>
</form>