Question

When my page loads and I press button1 I can get the image and can see it.

But when I click it second time it doesn’t work at all. I debugged it button1_Click(...) and I am sure that imageData != null.

I really can’t figure out what’s up… Please help me!

private void button1_Click(object button, RoutedEventArgs e)
{
    Guid sid = Guid.Parse("087462df-e4b6-484c-879e-cccc37b4c1f4");
    EntityQuery<Screenshot> screen = this._myDomainContext.GetScreenshotQuery(sid);
    this._myDomainContext.Load(screen).Completed += (sender, args) =>
    {
        try
        {
            byte[] imageData = (((LoadOperation<Screenshot>)sender).Entities.FirstOrDefault()).Screen;
            if (imageData != null)
            {
                BitmapImage img = Utilities.Graphics.GetImage(imageData);
                img.CreateOptions = BitmapCreateOptions.IgnoreImageCache;

                image1.Source = null;
                image1.Source = img;
            }
        }
        catch
        {
        }

    };
}

and

public static BitmapImage GetImage(byte[] rawImageBytes)
{
    BitmapImage imageSource = null;

    try
    {
        using (MemoryStream stream = new MemoryStream(rawImageBytes))
        {
            stream.Seek(0, SeekOrigin.Begin);
            BitmapImage b = new BitmapImage();
            b.SetSource(stream);
            imageSource = b;    
        }
    }
    catch  
    {
    }

    return imageSource;
}

Answer 1

Try changing the overload of Load:

this._myDomainContext.Load(screen, LoadBehavior.RefreshCurrent, true).Completed+= ...