WowUp/WowUp.WPF/Converters/InverseStringToVisibilty.cs

using System;
using System.Globalization;
using System.Windows;
using System.Windows.Data;

namespace WowUp.WPF.Converters
{
    public class InverseStringToVisibilty : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return string.IsNullOrEmpty((string)value) ? Visibility.Visible : Visibility.Collapsed;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return (Visibility)value == Visibility.Visible;
        }
    }
}