C# wpf Brush转Hex字符串的实例代码

//from MaterialDesignDemo.Converters
 public class BrushToHexConverter : IValueConverter
 {
  public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  {
   if (value == null) return null;
   string lowerHexString(int i) => i.ToString("X2").ToLower();
   var brush = (SolidColorBrush)value;
   var hex = lowerHexString(brush.Color.R) +
      lowerHexString(brush.Color.G) +
      lowerHexString(brush.Color.B);
   return "#" + hex;
  }
  public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  {
   throw new NotImplementedException();
  }
 }

BrushConverter brushConverter = new BrushConverter();
    PopupBorder.Background = (Brush)brushConverter.ConvertFromString("#121212");
    MessageLabel.Foreground = (Brush)brushConverter.ConvertFromString("#7d7d7d");