使用C#中的DownloadFileAsync逐个下载多个文件

using System.Net;

WebClient client = new WebClient();
client.DownloadFileCompleted += DownloadCompleted;
client.DownloadProgressChanged += DownloadProgressChanged;

private void DownloadCompleted(object sender, AsyncCompletedEventArgs e)
{
    if (e.Error != null)
    {
        // 下载出错时的处理逻辑
    }
    else
    {
        // 下载完成时的处理逻辑
    }
}

private void DownloadProgressChanged(object sender, DownloadProgressChangedEventArgs e)
{
    // 更新下载进度的处理逻辑
}

string[] fileUrls = { "http://example.com/file1.txt", "http://example.com/file2.txt", "http://example.com/file3.txt" };
string savePath = "C:\\Downloads\\";

foreach (string url in fileUrls)
{
    string fileName = Path.GetFileName(url);
    client.DownloadFileAsync(new Uri(url), savePath + fileName);
}