Hello, I am attaching a sample application that shows how you can bind the CloseButtonVisibility to a property of the view model object. The sample application uses the following style for the TabItemEx:

<Style TargetType="igWindows:TabItemEx">
    <Setter Property="Header" Value="{Binding HeaderText}" /> 
    <Setter Property="CloseButtonVisibility" Value="{Binding CanClose,Converter={StaticResource BoolToVisibility}}"/>
</Style>

Which bind the header of the TabItemEx to property called HeaderText and the CloseButtonVisibility to CanClose property of the view model with the following converter:

    public class BoolToVisibilityconverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
        {
            if (value != null)
            {
                if ((bool)value)
                {
                    return TabItemCloseButtonVisibility.Visible;
                }
                else
                {
                    return TabItemCloseButtonVisibility.Hidden;
                }
            }
            return value;
        }

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

Converting the bool value to TabItemExCloseButtonVisibility.

 If you require any further clarifications please do not hesitate to ask.

Sincerely,

Krasimir

Developer Support Engineer

Infragistics

www.infragistics.com/support