WebClient下载文件的进度百分比

Question

我必须下载3个7-Zip.exe文件，显示下载百分比。我根据此article创建了一个方法，但是没有发生“ DownloadProgressInProgress”和“ DownloadFileComplete”事件。

static void Main(string[] args)
{
    string[] listUri = { "https://www.7-zip.org/a/7z1900.exe", "https://www.7-zip.org/a/7z1900.exe", "https://www.7-zip.org/a/7z1900.exe" };

    for (int a = 0; a < listUri.Length; a++)
    {
        WebClient myWebClient = new WebClient();
        myWebClient.DownloadFileCompleted += new AsyncCompletedEventHandler(DownloadFileComplete);
        myWebClient.DownloadProgressChanged += new DownloadProgressChangedEventHandler(DownloadProgressInProgress);
        myWebClient.DownloadFileAsync(new Uri(listUri[a]), @"C:\\Users\\Luca\\Desktop\\DownloadZip" + (a + 1).ToString() + ".exe");
    }
}

private static void DownloadProgressInProgress(object sender, DownloadProgressChangedEventArgs e)
{
    throw new NotImplementedException();
}

private static void DownloadFileComplete(object sender, AsyncCompletedEventArgs e)
{
    throw new NotImplementedException();
}

如何通过下载文件列表来使用这两个事件？

谢谢！