“BindingExpression path error” using ItemsControl and VirtualizingStackPanel

Question

I\'m using Silverlight on Windows Phone 7.

Is it normal to get loads of \"BindingExpression path error\" debug messages when using a VirtualizingStackPanel? I think it

Answer 1

I know this post is pretty old, but a solution without creating the dummy properties is making sure the DataContext of the items can only be of the type you expect.

I do this with the following converter on the root of the data template:

public class SpecificTypeConverter : IValueConverter
{
    public string Type { get; set; }

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        if (value == null || value.GetType().FullName == this.Type)
        {
            return value;
        }

        return DependencyProperty.UnsetValue;
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new NotImplementedException();
    }
}

Add a static resource like this:

And in the data template, use the converter:

Now the Name property of the parent will never be checked.