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我在 angular 8 上工作，我在保存 excel 文件时遇到问题

上传文件进度时

我收到如下错误：

我尝试什么：

    this._dataService.PostUpload(this.selectedoptions.toString(),this.fileToUpload)
 .subscribe((event: HttpEvent<any>) => {
  switch (event.type) {
    case HttpEventType.Sent:
      console.log('Request has been made!');
      break;
    case HttpEventType.ResponseHeader:
      console.log('Response header has been received!');
      break;
    case HttpEventType.UploadProgress:
      this.progress = Math.round(event.loaded / event.total * 100);
      console.log(`Uploaded! ${this.progress}%`);
      break;
    case HttpEventType.Response:
      console.log('User successfully created!', event.body);
      this.message='User successfully created!';
      setTimeout(() => {
        this.progress = 0;
      }, 1500);

  }saveAs(event, this.fileToUpload.name + '.xlsx')
})

我得到如下结果错误：

结果

Request has been made!
core.js:4002 ERROR TypeError: Failed to execute 'createObjectURL' on 'URL': Overload resolution failed.
    at a (FileSaver.min.js:1)
    at SafeSubscriber._next (delivery-system.component.ts:265)
    at SafeSubscriber.__tryOrUnsub (Subscriber.js:194)
    at SafeSubscriber.next (Subscriber.js:132)
    at Subscriber._next (Subscriber.js:76)
    at Subscriber.next (Subscriber.js:53)
    at MergeMapSubscriber.notifyNext (mergeMap.js:84)
    at InnerSubscriber._next (InnerSubscriber.js:15)
    at InnerSubscriber.Subscriber.next (Subscriber.js:53)
    at TapSubscriber._next (tap.js:51)

那么如何解决上述错误？

4

0 回答 0