来自其他控件的WPF样式触发器

这样怎么样:

 <UserControl.Resources>       
      <local:BoolToVisibilityConverter x:Key="BoolToVisibilityConverter"/>
 </UserControl.Resources>       
 <Image Name="firstImage" Source="volumen.png"/>
 <Image Source="volumen_bar.png" Name="bar_volume" Visibility="{Binding IsMouseOver,ElementName=firstImage, Mode=OneWay, Converter={StaticResource BoolToVisibilityConverter}}" />

然后使用这个值转换器:

public class BoolToVisibilityConverter:IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
         return (bool)value ? Visibility.Visible : Visibility.Hidden;
    }
    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
         throw new NotSupportedException();
    }
}