Image property return nothing ?

Hello, Marco,

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik

Hello Dess,

Sorry for the late answer.

It looks like the image property was returning nothing, despite something was drawn in the control after pasting, because I had tried to involve some Databinding on the image property. Setting and reading the image "on hand" from my DataObject is working fine.

By the way, how could we handle transparency with this control. It seems to get black when I paste transparency pictures ?

Hello, Marco,

I have tried pasting an image to RadPictureBox and after this operation is done, the Image property returns the displayed image on my end. 

As to the question at hand, when the paste operation is being processed in RadPictureBox, the Clipboard.GetImage method is internally used. That is why the transparency is lost. 

I have logged it in our feedback portal by creating a public thread on your behalf. You can track its progress, subscribe for status changes and add your comments on the following link - feedback item.

I have also updated your Telerik points.

Currently, the possible solution that I can suggest is to replace the default Paste menu item Click action: 

        public RadForm1()
        {
            InitializeComponent(); 

            this.radPictureBox1.ContextMenuItemClick += RadPictureBox1_ContextMenuItemClick;
        }

        private void RadPictureBox1_ContextMenuItemClick(object sender, HandledEventArgs e)
        {
            if (sender == this.radPictureBox1.ContextMenuProperties.PasteItem)
            {
                e.Handled = true;
                // Image extractedImage = // get image with transparency; 
                // this.radPictureBox1.Image = extractedImage;
            }
        }

I have researched in general programming forums for a sample approach to get the image with transparency: https://stackoverflow.com/questions/65603159/check-if-clipboard-getimage-is-transparent-in-c-sharp 

You can give it a try and apply the result image in the ContextMenuItemClick event handler.

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik

Hello Dess,

I have overload the paste command to use a clipboard function supporting the alpha channel and it works perfectly.

Thanks for creating a feedback item about this, I have added my vote on it.

Best regards