我正在创建一个angular2项目,并且我正在使用ng2-uploader作为文件上传的插件。我想抓住一个div,并在同一时间我想要在div内的上传按钮。选择一个文件上传后,我得到的错误为 TypeError:无法将undefined或null转换为对象。如何解决:TypeError:无法将undefined或null转换为对象
HTML代码:
<div [hidden]="!onUpload" ngFileDrop [options]="options" (onUpload)="handleUpload($event)" [ngClass]="{'file-over': hasBaseDropZoneOver}" (onFileOver)="fileOverBase($event)">
<input type="file" ngFileSelect [options]="options" (onUpload)="handleUpload($event)">
<p><span>Response: {{ uploadFile | json }}</span></p>
</div>
组件是:
import { Component, OnInit, NgModule, NgZone } from '@angular/core';
@Component({
selector: 'app-fileselect',
templateUrl: './fileselect.component.html',
styleUrls: ['./fileselect.component.css']
})
export class FileSelectComponent implements OnInit {
zone: NgZone;
hasBaseDropZoneOver: boolean = false;
basicProgress: number = 0;
uploadFile: any;
constructor() {
this.zone = new NgZone({ enableLongStackTrace: false });//file upload
}
options: Object = {
url: 'http://localhost:4200/assets/documents'
};
handleUpload(data): void {
if (data && data.response) {
data = JSON.parse(data.response);
this.uploadFile = data;
this.zone.run(() => {
this.basicProgress = data.progress.percent;
});
}
}
fileOverBase(e: any): void {
this.hasBaseDropZoneOver = e;
}
}
我也面对这个问题,让我知道html的完整结构, 主要是这个上传按钮的外部div。 –
当然我会更新我的问题 – sainu