Question

I have a stack panel for which AllowDrop property is true and I have to drag a user control (Player.xaml) on this stack panel.
Inside the Drop event of Stack Panel, I have to check if the items being dragged are of the user control (Player.xaml) type

private void StackPanel_Drop(object sender, DragEventArgs e)
    {
    if (e.Data.GetDataPresent("ProjectName.FolderName.Player"))
    {
            spHolder.Children.Clear();
            spHolder.Children.Add((UserControls.AnswerControl)e.Data.GetData("ProjectName.FolderName.Player"));
    }
}

If I would have been dropping a simple text on control, I would done like this:

private void StackPanel_Drop(object sender, DragEventArgs e)
    {
    if (e.Data.GetDataPresent(DataFormats.StringFormat))
    {
            spHolder.Children.Clear();
            spHolder.Children.Add((UserControls.AnswerControl)e.Data.GetData(DataFormats.StringFormat));
    }
}

But what I should I do when I am dropping the custom user control on the stack panel? what is the format to be specificed for this thing?

Answer 1

Use

Dictionary<Player, string> dropShapes = e.Data.GetData(typeof(Dictionary<Player, string>))
                as Dictionary<Player, string>;

Or

Player dropShape = e.Data.GetData(typeof(Player))