转换器

class BoolToVisibilityConverter:IValueConverter{public object Convert(object value, Type targetType, object parameter, string language){bool? b &＃61; (bool?)value;//如果传入的值为true&＃xff0c;则返回Visibleif (b is true){return Visibility.Visible;}//否则返回Collapsedreturn Visibility.Collapsed;}public object ConvertBack(object value, Type targetType, object parameter, string language){throw new NotImplementedException();}}