在XAML中使用Style设置绑定Drawing.Color

Question

如何将设置中定义的Color Bkg(System.Drawing.Color)与XAML中的Style 绑定？

的xmlns:道具= "CLR的命名空间:App.Properties"

<Style TargetType="{x:Type StackPanel}" x:Key="_itemStyle">
     <Setter Property="Background" Value="{Binding Path=Bkg, Source={x:Static props:Settings.Default}}"/>

Background属性是System.Windows.Media.Color类型,所以它需要以某种方式转换？

Answer 1

Panel.Background属性是一种System.Windows.Media.Brush类型,System.Windows.Media.Color因此您不需要将其转换为SolidColorBrush.您可以在下面找到两种情况:

设置System.Windows.Media.Color类型

<Setter Property="Background">
   <Setter.Value>
      <SolidColorBrush Color="{Binding Source={x:Static props:Settings.Default}, Path=Bkg}"/>
   </Setter.Value>
</Setter>

设置System.Drawing.Color类型为:为此您需要自定义IValueConverter将其转换为SolidColorBrush:

public class ColorToBrushConverter : IValueConverter
{
  public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
  {
      var dc = (System.Drawing.Color)value;
      return new SolidColorBrush(new Color { A = dc.A, R = dc.R, G = dc.G, B = dc.B });
  }

  public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
  {
      throw new NotImplementedException();
  }
}

您在资源中定义的:

<Window.Resources>
    <local:ColorToBrushConverter x:Key="ColorToBrushConverter"/>
</Window.Resources>

你可以像这样使用它:

<Setter Property="Background" Value="{Binding Source={x:Static props:Settings.Default}, Path=Bkg, Converter={StaticResource ColorToBrushConverter}}"/>