File upload from <input type="file">

I think that it's not supported. If you have a look at this DefaultValueAccessor directive (see https://github.com/angular/angular/blob/master/modules/angular2/src/common/forms/directives/default_value_accessor.ts#L23). You will see that the value used to update the bound element is $event.target.value.

This doesn't apply in the case of inputs with type file since the file object can be reached $event.srcElement.files instead.

For more details, you can have a look at this plunkr: https://plnkr.co/edit/ozZqbxIorjQW15BrDFrg?p=info:

@Component({  selector: 'my-app',  template: `    <div>      <input type="file" (change)="onChange($event)"/>    </div>  `,  providers: [ UploadService ]})export class AppComponent {  onChange(event) {    var files = event.srcElement.files;    console.log(files);  }}

@Component({  selector: 'my-app',  template: `    <div>      <input name="file" type="file" (change)="onChange($event)"/>    </div>  `,  providers: [ UploadService ]})export class AppComponent {  file: File;  onChange(event: EventTarget) {        let eventObj: MSInputMethodContext = <MSInputMethodContext> event;        let target: HTMLInputElement = <HTMLInputElement> eventObj.target;        let files: FileList = target.files;        this.file = files[0];        console.log(this.file);    }   doAnythingWithFile() {   }}

There is a slightly better way to access attached files. You could use template reference variable to get an instance of the input element.

Here is an example based on the first answer:

@Component({  selector: 'my-app',  template: `    <div>      <input type="file" #file (change)="onChange(file.files)"/>    </div>  `,  providers: [ UploadService ]})export class AppComponent {  onChange(files) {    console.log(files);  }}

Here is an example app to demonstrate this in action.

Template reference variables might be useful, e.g. you could access them via @ViewChild directly in the controller.