Question

我试图将值设置为从json动态添加的嵌套组件，但我无法实现它

我尝试过什么

在另一个组件中创建嵌套组件，并在单击按钮时设置json值，我可以设置name的值，但不能为addressees和extra space object array设置

请帮我解决此问题，对不起，如果这是一个重复的问题

App.component.html

<div class="container">
  <div class="row">
    <div class="col-xs-12">
      <div class="margin-20">
        <h4>Add customer</h4>
      </div>
      <form [formGroup]="myForm" novalidate (ngSubmit)="save(myForm)">
        <div class="form-group">
          <label>Name</label>
          <input type="text" class="form-control" formControlName="name">
          <small *ngIf="!myForm.controls.name.valid" class="text-danger">
              Name is required (minimum 5 characters).
            </small>
        </div>
        <!--addresses-->
        <div formArrayName="addressees">
          <div *ngFor="let address of myForm.controls.addressees.controls; let i=index" class="panel panel-default">
            <div class="panel-heading">
              <span>Address {{i + 1}}</span>
              <span class="glyphicon glyphicon-remove pull-right" *ngIf="myForm.controls.addressees.controls.length > 1" (click)="removeAddress(i)"></span>
            </div>
            <div class="panel-body" [formGroupName]="i">
              <address [group]="myForm.controls.addressees.controls[i]"></address>
            </div>
          </div> 
        </div>

        <div class="margin-20">
          <a (click)="addAddress()" style="cursor: default">
            Add another address +
          </a>
        </div>

        <div class="margin-20">
          <button type="submit" class="btn btn-primary pull-right" [disabled]="!myForm.valid">Submit</button>
        </div>
        <div class="clearfix"></div>

        <div class="margin-20">
          <div>myForm details:-</div>
          <pre>Is myForm valid?: <br>{{myForm.valid | json}}</pre>
          <pre>form value: <br>{{myForm.value | json}}</pre>
        </div>
      </form>
    </div>
  </div>
</div>

App.Component.ts

export class AppComponent implements OnInit {
    public myForm: FormGroup;

    constructor(private _fb: FormBuilder) { }

    ngOnInit() {
        this.myForm = this._fb.group({
            name: ['', [Validators.required, Validators.minLength(5)]],
            addressees: this._fb.array([])
        });

        // add address
        this.addAddress();

        /* subscribe to addresses value changes */
        // this.myForm.controls['addresses'].valueChanges.subscribe(x => {
        //   console.log(x);
        // })
    }

    initAddress() {
        return this._fb.group({
            street: ['', Validators.required],
            postcode: [''],
            extraspaces: this._fb.array([])
        });
    }

    addAddress() {
        const control = <FormArray>this.myForm.controls['addressees'];
        const addrCtrl = this.initAddress();

        control.push(addrCtrl);

        /* subscribe to individual address value changes */
        // addrCtrl.valueChanges.subscribe(x => {
        //   console.log(x);
        // })
    }

    removeAddress(i: number) {
        const control = <FormArray>this.myForm.controls['addressees'];
        control.removeAt(i);
    }

    save(model: Customer) {
        // call API to save
        // ...
        console.log(model);
    }
}

Angular 2需要将值设置为嵌套组件

0 个答案: