Question

I have a list box that I’m trying to populate with a list of viewboxes.
The listbox takes in the list without a problem. However, when my function reaches its end, I receive the error:

“Must disconnect specified child from current parent Visual before attaching to new parent Visual.”

The viewboxes are created from the same initial viewbox and then edited, which I believe may be my problem.

for(...)
{
        Viewbox newviewbox = (Viewbox)myViewbox; //myViewbox created in XAML
        // edits newviewbox here
        viewboxlist.Add(newviewbox); //viewboxlist created upon initialization
        newviewbox = null;
    }
myListBox.ItemsSource = viewboxlist;

Any advice is greatly appreciated.

Thanks.

Answer 1

You are not creating new viewboxes, you are just referencing the same viewbox and adding it to the list several times. Thus the error that the viewbox already have a parent and should be disconnected before assigning it to a new parent.

You should create new instances of ViewBox like this:

var newViewBox = new ViewBox();