private static async Task LoadThumbnail(PhotoThumbnail thumbnailControl, string uri)
{
if (thumbnailControl.Dispatcher.Thread == Thread.CurrentThread)
{
var image = new BitmapImage();
image.BeginInit();
image.CacheOption = BitmapCacheOption.OnLoad;
image.UriSource = new Uri(uri);
image.DecodePixelWidth = 90;
image.EndInit();
thumbnailControl.ThumbnailImage.Source = image;
}
else
{
await thumbnailControl.Dispatcher.BeginInvoke(new Func <PhotoThumbnail, string, Task>(LoadThumbnail), thumbnailControl, uri);
}
}
public static async Task <PhotoThumbnail> CreateThumbnail(WrapPanel panel, string uri)
{
var result = new PhotoThumbnail();
if (panel.Dispatcher.Thread == Thread.CurrentThread)
{
panel.Children.Add(result);
}
else
{
await panel.Dispatcher.BeginInvoke(new Func <UIElement, int>(panel.Children.Add), result);
}
if (uri != null && File.Exists(uri))
{
await Task.Run(() => LoadThumbnail(result, uri));
}
return(result);
}
private async Task AddThumbnail(System.IO.FileInfo fi)
{
var thumbnail = await PhotoThumbnail.CreateThumbnail(ThumbNailsStackPanel, fi.FullName);
//ThumbNailsStackPanel.Children.Add(thumbnail);
}