image - Xamarin 图像数据在流副本上无效

Question

在第一种情况下，代码工作正常。 在第二种情况下，我得到:

ImageLoaderSourceHandler: Image data was invalid: Xamarin.Forms.StreamImageSource

那么，案例 A(工作正常):

Stream stream = await DependencyService.Get<IPicturePicker>().GetGalleryStreamAsync();
image.Source = ImageSource.FromStream(() => stream);

案例 B(错误):

MemoryStream memoryStream = new MemoryStream();
Stream stream = await DependencyService.Get<IPicturePicker>().GetGalleryStreamAsync();
stream.CopyTo(memoryStream);
image.Source = ImageSource.FromStream(() => memoryStream);

请帮忙!

Answer 1

在最后一行试试这个

 Imgsrc= ImageSource.FromStream(() => new MemoryStream(memorystream));