Saving images from the SlideView control

[CrisRowlands]

So, ultimately Im trying to create something which mimics the built in image browser, complete with a menu option of 'save image'.
Saving images to the users image gallery is easy enough, the problem I have is knowing where to get the images from.
Is there any way to access individual images from within the control?

Coding for years, still regularly feel like a newbie :P


I know the control is in beta, maybe you could add a saveSelectedImage(); method in there to make it really easy for customers ;)

[Georgi]

Hi Cris,

Thank you for your question and for your interest in RadSlideView.

This is a nice suggestion and we will definitely add it to our code base. The API will be exposed by SlideViewPictureSource and will look like:

public static WriteableBitmap GetSelectedImage(RadSlideView slideView)

The WriteableBitmap type is the best candidate as it may be saved as a Jpeg to a stream - either MemoryStream or a FileStream from the isolated storage.

As for now you can manually retrieve the selected image as a WriteableBitmap:

private void TrySaveSelectedImage()
{
    SlideViewPanel panel = ElementTreeHelper.FindVisualDescendant<SlideViewPanel>(this.slideView);
    if (panel != null)
    {
        FrameworkElement visualItem = panel.VisualItemFromLogicalIndex(this.slideView.SelectedIndex);
        Image image = ElementTreeHelper.FindVisualDescendant<Image>(visualItem);
        if (image == null)
        {
            Debug.Assert(false, "Must have Image instance.");
            return;
        }

        BitmapImage bitmap = image.Source as BitmapImage;
        if (bitmap.PixelWidth == 0)
        {
            image.ImageOpened += this.image_ImageOpened;
        }
        else
        {
            this.SaveImage(bitmap);
        }
    }
}

private void SaveImage(BitmapImage bitmap)
{
    WriteableBitmap wrBitmap = new WriteableBitmap(bitmap);
    wrBitmap.Invalidate();

    MemoryStream stream = new MemoryStream();
    wrBitmap.SaveJpeg(stream, wrBitmap.PixelWidth, wrBitmap.PixelHeight, 0, 85);
}

private void image_ImageOpened(object sender, RoutedEventArgs e)
{
    Image image = sender as Image;
    image.ImageOpened -= this.image_ImageOpened;
    this.SaveImage(image.Source as BitmapImage);
}

I hope this information is useful. Let me know if I can assist you further.

And I would like to thank you for your valuable suggestion - I have added 1000 Telerik points to your account for your feedback.

Regards,
Georgi
the Telerik team

[CrisRowlands]

Thank you for your reply, thats exactly what I was looking for :)