ConverterParameter 사용하기

public class StringFormatConverter : IValueConverter

{

public object Convert(object value, Type targetType, object parameter, CultureInfo culture)

{

if(targetType == typeof(string) && parameter is string)

     return String.Format(culture, parameter as string, value);

return value;

}

}

================ 사용하기 ===================

Text="{Binding ElementName=slider,

    Path=Value,

    Converter={StaticResource stringFormat},

    ConverterParameter='The slider is {0:F2}'}"