How to manipulate WPF GUI based on user roles

Question

I am using .NET\'s IIdentity and IPrincipal objects for role based security, and I am at the step of modifying controls shown based on roles the current user has.

My

Answer 1

Although previous answer will work, to me it looks little ugly to detect visibility in logic objects. I would use converter for that...

And then the converter itself

public class RoleToVisibilityConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var principal = value as Principal;
        if(principal != null) {
            return principal.IsInRole((string)parameter) ? Visibility.Visible : Visibility.Collapsed;
        }

        return null;
    }

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