public async Task <IRandomAccessStream> GetThumbnailImage(IRandomAccessStream stream, int width, int height, bool smartCropping = true)
{
var response = await _client.GetThumbnailAsync(stream.AsStreamForRead(), width, height, smartCropping);
var responseStream = new MemoryStream(response);
return(responseStream.AsRandomAccessStream());
}
/// <summary>
/// Function to browse for an image and get a thumbnail for it. Thumbnail size is set to 250x250 pixels
/// </summary>
/// <param name="obj"></param>
private async void BrowseAndAnalyze(object obj)
{
var openDialog = new Microsoft.Win32.OpenFileDialog();
openDialog.Filter = "Image Files(*.jpg, *.gif, *.bmp, *.png)|*.jpg;*.jpeg;*.gif;*.bmp;*.png";
bool?result = openDialog.ShowDialog();
if (!(bool)result)
{
return;
}
string filePath = openDialog.FileName;
Uri fileUri = new Uri(filePath);
BitmapImage image = new BitmapImage(fileUri);
image.CacheOption = BitmapCacheOption.None;
image.UriSource = fileUri;
ImageSource = image;
try
{
using (Stream fileStream = File.OpenRead(filePath))
{
byte[] thumbnailResult = await _visionClient.GetThumbnailAsync(fileStream, 250, 250);
if (thumbnailResult != null && thumbnailResult.Length != 0)
{
CreateThumbnail(thumbnailResult);
}
}
}
catch (Exception ex)
{
Debug.WriteLine($"Failed to analyze image: {ex.Message}");
}
}
