输入类型文件上的NgModel [英] NgModel on Input type file

问题描述

我正在尝试通过ngModel这样的典型Angular方式绑定到输入字段类型文件:

I'm trying to make a binding to an input field type file through ngModel on the typical Angular way like this:

<input type="file" id="fileUpload" [(ngModel)]="file">

和

files:any

我的问题是选择文件后，变量files的值仍然是undefined 以下是关于stackblitz的示例: https://stackblitz.com/edit/angular-6mbdww

My problem is that after I have chosen a file, the value of my variable files is still undefined Here an example with stackblitz: https://stackblitz.com/edit/angular-6mbdww

推荐答案

您必须通过(更改)事件从外部进行操作

You have to do it externally through (change) event

<input (change)="onFileChange($event)" type="file" id="fileUpload">

然后像下面的代码一样访问ts文件

And access in the ts file like the below code

  files: any[];

  onFileChange(event){
    this.files = event.target.files;
    console.log(event);
  }

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