WPF：將Icon屬性綁定到System.Drawing.Icon

Question

我已使用以下代碼將菜單項綁定到菜單項模型類：

<Window.Resources>
    <classes:IconConverter x:Key="IconConverter"/>

    <Style TargetType="MenuItem" x:Key="BoundMenuItemStyle">
        <Setter Property="Header" Value="{Binding Path=Header}" />
        <Setter Property="ItemsSource" Value="{Binding Path=Children}" />
        <Setter Property="Command" Value="{Binding Path=Command}" />
        <Setter Property="Icon" Value="{Binding Path=Icon, Converter={StaticResource IconConverter}}"/>
    </Style>
</Window.Resources>
<DockPanel>
    <Menu DockPanel.Dock="Top" ItemsSource="{Binding MenuItems}" ItemContainerStyle="{StaticResource BoundMenuItemStyle}"/>
</DockPanel>

模型類的Icon屬性類型為System.Drawing.Icon 。 所以我寫了一個轉換器將其轉換為ImageSource ：

class IconConverter : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        if (value is System.Drawing.Icon)
        {
            var icon = value as System.Drawing.Icon;
            ImageSource imageSource = Imaging.CreateBitmapSourceFromHIcon(
                icon.Handle,
                System.Windows.Int32Rect.Empty,
                System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
            return imageSource;
        }

        return Binding.DoNothing;
    }

    public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        throw new NotSupportedException();
    }
}

問題是我的菜單中出現一個字符串，而不是圖標。

Answer 1

我的問題是我應該從轉換器返回Image控件的實例：

    public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
    {
        if (value is System.Drawing.Icon)
        {
            var icon = value as System.Drawing.Icon;
            ImageSource imageSource = Imaging.CreateBitmapSourceFromHIcon(
                icon.Handle,
                System.Windows.Int32Rect.Empty,
                System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());
            System.Windows.Controls.Image img = new System.Windows.Controls.Image();
            img.Source = imageSource;
            return img;
        }

        return Binding.DoNothing;
    }