将字符串数组循环到文本框和 post 从提交表单更改 angular 7

Question

您好，我确定之前有人问过这个问题，但我无法在这里找到答案。我有一个字符串数组，它是循环的，并在提交表单时呈现为表单内的文本框，所有具有新更改值的值都应提交给 onSubmit()

 <form name="form" (ngSubmit)="f.form.valid && onSubmit()" #f="ngForm" novalidate>

  <input type="text" class="form-control" name="caption" [(ngModel)]="blockdummyJson.Properties.Caption" #Caption="ngModel"
    [ngClass]="{ 'is-invalid': f.submitted && Caption.invalid }" required />
  <div *ngIf="f.submitted && Caption.invalid" class="invalid-feedback">
    <div *ngIf="Caption.errors.required">radio button caption is required</div>
  </div>
  <input type="button" value="addOption" (click)="addOptionToRadioOption()" />

  <div *ngFor="let option of blockdummyJson.Properties.Options; let i = index">
    <input type="text" class="form-control" [(ngModel)]="blockdummyJson.Properties.Options[i]" />
  </div>
  <div class="form-group">
    <button class="btn btn-primary">Add</button>
  </div>

</form>

在侧面组件

radioOption:any=[];
  data: any;
  blockdummyJson: any;
  blockName: string = 'OptionBuildingBlock';
  activityInfo: any;

  constructor(private messageservice: MessageService,
    private httpservice: ConfigService,
    private communicationservice: CommunicationService, ) { 

    var self = this;
    this.activityInfo = this.data;

    this.httpservice.getConfig(ConfigValue.apiURI + 'BuildingBlocks/' + this.blockName).subscribe(
      data => {
        self.blockdummyJson = data;
      },
      err => { },
      () => console.log('getting BuildingBlocks config completed')
    )

  }
    addOptionToRadioOption()
      {
        this.blockdummyJson.Properties.Options.push("sample Value");
      }

      onSubmit() {
        debugger;
      }

来自服务器的数据选项包括数组

Options=['test','test1',test2'];

提前致谢。

Answer 1

您已经拥有两种数据绑定方式，每次用户输入时，它都会更新为 DOM。您不依赖于 ngForm，而是使用 modelObj。

export class AppComponent  {
  name = 'Angular';

  blockdummyJson = {
    Properties: {
      Options :['test','test1','test2'],
      Caption: ''
    }
  };

  addOptionToRadioOption()
      {
        this.blockdummyJson.Properties.Options.push(this.blockdummyJson.Properties.Caption);
      }

  onSubmit(formObj){
    console.log(this.blockdummyJson);
  }

模板：

<form name="form" (ngSubmit)="f.valid && onSubmit(f)" #f="ngForm" novalidate>

  <input type="text" class="form-control" name="caption" [(ngModel)]="blockdummyJson.Properties.Caption" #Caption="ngModel"
    [ngClass]="{ 'is-invalid': f.submitted && Caption.invalid }" required />
  <div *ngIf="f.submitted && Caption.invalid" class="invalid-feedback">
    <div *ngIf="Caption.errors.required">radio button caption is required</div>
  </div>
  <input type="button" value="addOption" (click)="addOptionToRadioOption()" />

  <div *ngFor="let option of blockdummyJson.Properties.Options; let i = index">
    <input type="text" name="options-{{i}}" class="form-control" [(ngModel)]="blockdummyJson.Properties.Options[i]" />
  </div>
  <div class="form-group">
    <button class="btn btn-primary">Add</button>
  </div>

</form>

StackBlitz: https://stackblitz.com/edit/angular-vsxwuy

将字符串数组循环到文本框和 post 从提交表单更改 angular 7

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