ListBoxItem produces “System.Windows.Data Error: 4” binding error

Question

I have created the fallowing ListBox:

Answer 1

The easiest way to solve this is to ensure that your Listbox has a ItemContainerStyle. See the following example:

    
        
    

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What happens is that your Items are being created, and by default they look for parent's property which isn't defined. Explicitly defining it will solve this problem.

I had the same issue using a TreeView and changing the bound source for these templates would cause those warnings.