如何在Flutter Web中按下按钮时下载文件

import 'dart:html';

void downloadFile() {
  // 下载文件的逻辑
}

ButtonElement button = querySelector('#downloadButton');
button.onClick.listen((event) => downloadFile());

void downloadFile() {
  AnchorElement anchorElement = AnchorElement(href: '#');
  anchorElement.download = 'filename.txt'; // 设置下载的文件名
}

void downloadFile() {
  AnchorElement anchorElement = AnchorElement(href: '#');
  anchorElement.download = 'filename.txt';

  Blob blob = Blob(['file content'], 'text/plain'); // 创建包含文件内容的Blob对象
  anchorElement.href = Url.createObjectUrlFromBlob(blob);
}

void downloadFile() {
  AnchorElement anchorElement = AnchorElement(href: '#');
  anchorElement.download = 'filename.txt';

  Blob blob = Blob(['file content'], 'text/plain');
  anchorElement.href = Url.createObjectUrlFromBlob(blob);

  document.body.append(anchorElement);
  anchorElement.click();
  anchorElement.remove();
}

import 'dart:html';

void main() {
  ButtonElement button = querySelector('#downloadButton');
  button.onClick.listen((event) => downloadFile());
}

void downloadFile() {
  AnchorElement anchorElement = AnchorElement(href: '#');
  anchorElement.download = 'filename.txt';

  Blob blob = Blob(['file content'], 'text/plain');
  anchorElement.href = Url.createObjectUrlFromBlob(blob);

  document.body.append(anchorElement);
  anchorElement.click();
  anchorElement.remove();
}