node.js - Angular 同时从 formData 和 formGroup 发送数据

Question

是否可以使用响应式(Reactive)表单(模型驱动)发送文件？文件来自formData，另一个数据来自FormGroup，如何组合它们并发送到nodejs？

从以下位置获取文件:

<input formControlName="name" class="form-control" type="text">
<input formControlName="surname" class="form-control" type="text">
<input formControlName="email" class="form-control" type="mail">
<input type="file"(change)="addPhoto($event)" />

创建FormControl和FormGroup

createFormControls() {
  this.name = new FormControl("", Validators.required);
  this.surname = new FormControl("", Validators.required);
  this.email = new FormControl();
  this.file = new FormControl("");
}

createForm() {
  this.userData = new FormGroup({
    name: this.name,
    surname: this.surname,
    email: this.email,
    file: this.file
  });
}

推送数据

addPhoto(event) {
let target = event.target || event.srcElement;
this.files.push(target.files);
}

发送数据到node js

onSubmit() {
  if (this.userData.valid) {
  let filelist: FileList = this.files;
  const formData = new FormData();
  for (let i = 0; i < filelist.length; i++) {
    this.readyFile = filelist[i];
    formData.append('file', this.readyFile[0]);
  }
   // Here I have a main problem - there are "formData" and 
   // "this.userData.value" how send it to together(concat) ?

    this.apiService.updateUserData(--?--)
  }
}

Answer 1

在addPhoto中，替换为以下代码。

addPhoto(event) {
  let reader = new FileReader();

  if(event.target.files && event.target.files.length) {
    const [file] = event.target.files;
    reader.readAsDataURL(file);

    reader.onload = () => {
      this.formGroup.patchValue({
        file: reader.result
      });

      // need to run CD since file load runs outside of zone
      this.cd.markForCheck();
    };
  }
}