c# - 从 URL 到流的图像

Question

我从 url 获取图片:

BitmapImage image = new BitmapImage(new Uri(article.ImageURL));
NLBI.Thumbnail.Source = image;

这很完美，现在我需要将它放入流中，使其成为字节数组。我这样做:

WriteableBitmap wb = new WriteableBitmap(image);
MemoryStream ms = new MemoryStream();
wb.SaveJpeg(ms, image.PixelWidth, image.PixelHeight, 0, 100);
byte[] imageBytes = ms.ToArray();

代码因 NullReference 而失败，如何解决？

Answer 1

var webClient = new WebClient();
byte[] imageBytes = webClient.DownloadData(article.ImageURL);