WPF Trigger not null

Question

How to trigger an action in WPF when the Property is not null? This is a working solution when is null:

Answer 1

it is an old question, but I want to answer. Actually you can. Just you have to use Converter in binding. Converter must return is null or not. So you will check statement is true or false. It provide you can check two condition if return value is false, it means it is not null. If it is true, it means it is null.

    public class IsNulConverter: IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {

        return value == null;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {

        return Binding.DoNothing;
    }
}