WPF ListBox Drag and Drop

[Dean]

Hi,

I have a project where I need to be able to drag a ListBox Item to a different ListBox. If I dont populate the second Listbox with anything; then when I drop the item, it just disappears. When I have at least 1 Item in the second ListBox then I get "'Element already has a logical parent. It must be detached from the old parent before it is attached to a new one". I need to be able to do this as well as add a prefix to each added item eg: "A - FirstItem" and "B - SecondItem".

I tried using the Converter class too but it doesnt seem to work. It is important to note that I have tried this method using Binding as well as just dynamically adding objects to the Listbox. Nothing works. Attached is all the images from my sample project needed to diagnose my issue.

Please Help

Thank you,

Dean.

[Stenly]

Hello Dean,

The framework throws this exception because the item which is attempted to be added is already a child of another element. What I could suggest, in order to avoid this exception, is to set the ItemSource of the list boxes, instead of adding items to the Items collection.

That said, I have prepared a sample project, implementing the mentioned approach, as well as the xaml code from Capture.Png image file. 

Regards,
Stenly
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