using System; using System.Globalization; using System.Windows.Data; namespace PRSDesktop { [ValueConversion(typeof(DateTime), typeof(bool))] public class DateHasValueConverter : IValueConverter { public object Convert(object value, Type targetType, object parameter, CultureInfo culture) { var dateTime = (DateTime)value; return !dateTime.Equals(DateTime.MinValue); } public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture) { throw new NotImplementedException(); } } }