Drag&Drop WinForm UserControl object

Question

I'm trying to d&d UserControl that I created. Here is the UserControl:

For example, I have two UserControls like this in the FlowLayotPanel. When I drag one UserControl to another I want to merge the UserControl data. Merge their labels and images.

According to this article I don't have the ability to pass the draggable UserControl as an argument to DoDragDrop function.

What I'm doing right now is something like this:

        string dataString = "";

        dataString += barcodeLabel.Text + "~";

        string sImg64bit = ImageToBase64(scannedDocImg, ImageFormat.Bmp);

        dataString += sImg64bit;

        DoDragDrop(dataString, DragDropEffects.Copy);   

I'm just passing the data in a string format. I don't think this is good idea? Is there any other way to pass draggable data? Any thoughts?

Answer 1

Thanks to @HansPassant I realized that the answer was under my nose

Here is what I did:

  private void ScannedDocContainer_MouseDown(object sender, MouseEventArgs e)
  {
     DoDragDrop((ScannedDocContainer)sender, DragDropEffects.Copy);    
  }

  private void ScannedDocContainer_DragDrop(object sender, DragEventArgs e)
  {
     if (e.Data.GetDataPresent(typeof(ScannedDocContainer)))
     {
        ScannedDocContainer docContainerDragged = (ScannedDocContainer)e.Data.GetData(typeof(ScannedDocContainer));
        ...
        "Extract the required data here"
        ...
     }
  }

This way I get's the entire dragged UserControl