我在我的 Angular 4 应用程序上实现了简单的文件上传，一切正常，但我有一个问题我不知道如何解决，所以当我完成上传第一个项目时，onSuccessItem 回调触发并且我在那里做了一些逻辑，但是当我上传另一个文件时，相同的回调不会触发。我的问题是每次上传文件时如何触发 onSuccessItem 回调，我不想刷新页面。我的代码看起来像这样。我正在使用这个插件https://github.com/valor-software/ng2-file-upload
import { Component } from '@angular/core';
import {FileUploader, FileItem, ParsedResponseHeaders} from "ng2-file-upload";
@Component({
selector: 'upload-file',
template: `
<input type="file" ng2FileSelect [uploader]="uploader">
`,
})
export class UploadFileComponent {
uploader:FileUploader;
ngOnInit(): void {
this.uploader = new FileUploader({
url: 'http://url.to/upload',
headers: [{name:'Accept', value:'application/json'}],
autoUpload: true,
});
this.uploader.onErrorItem = (item, response, status, headers) => this.onErrorItem(item, response, status, headers);
this.uploader.onSuccessItem = (item, response, status, headers) => this.onSuccessItem(item, response, status, headers);
}
onSuccessItem(item: FileItem, response: string, status: number, headers: ParsedResponseHeaders): any {
//this gets triggered only once when first file is uploaded
}
onErrorItem(item: FileItem, response: string, status: number, headers: ParsedResponseHeaders): any {
let error = JSON.parse(response); //error server response
}
}