WPF下载多个文件并在弹出窗口中显示进度

using System;
using System.Collections.Generic;
using System.IO;
using System.Net.Http;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;

namespace WpfApp
{
    public partial class MainWindow : Window
    {
        private List<string> downloadUrls = new List<string>
        {
            "http://example.com/file1.zip",
            "http://example.com/file2.zip",
            "http://example.com/file3.zip"
        };

        public MainWindow()
        {
            InitializeComponent();
        }

        private async void StartDownloadButton_Click(object sender, RoutedEventArgs e)
        {
            var progressWindow = new ProgressWindow();
            progressWindow.Show();

            await DownloadFilesAsync(progressWindow);
        }

        private async Task DownloadFilesAsync(ProgressWindow progressWindow)
        {
            for (int i = 0; i < downloadUrls.Count; i++)
            {
                var url = downloadUrls[i];
                var fileName = Path.GetFileName(new Uri(url).AbsolutePath);

                progressWindow.UpdateProgress($"Downloading {fileName}...", (i + 1) * 100 / downloadUrls.Count);

                await DownloadFileAsync(url, fileName);
            }

            progressWindow.Close();
        }

        private async Task DownloadFileAsync(string url, string fileName)
        {
            using (var client = new HttpClient())
            {
                var response = await client.GetAsync(url, HttpCompletionOption.ResponseHeadersRead);
                response.EnsureSuccessStatusCode();

                using (var stream = await response.Content.ReadAsStreamAsync())
                using (var fileStream = new FileStream(fileName, FileMode.Create))
                {
                    await stream.CopyToAsync(fileStream);
                }
            }
        }
    }

    public partial class ProgressWindow : Window
    {
        public ProgressWindow()
        {
            InitializeComponent();
        }

        public void UpdateProgress(string message, int percentage)
        {
            Dispatcher.Invoke(() =>
            {
                ProgressLabel.Content = message;
                ProgressBar.Value = percentage;
            });
        }
    }
}