转换器绑定错误

Question

I have MdiContainer in my viewModel that I create dynamically:

    public MainWindowViewModel()
    {
         MdiContainer = new TabbedMdiContainer();
    }                                          
    public TabbedMdiContainer MdiContainer { get; private set; }

In Xaml I set content of this container to mdihost:

<docking:TabbedMdiHost x:Uid="ALTabbedMdiHost" Grid.Row="1" IsEnabled="True" Content="{Binding MdiContainer}" IsCloseButtonOnTab="False"/>

When I create dynamically new tab with background image, I want that image to fill height and width of the mdiContainer. For this purpose I made made binding for image height and width.

 var height = new Binding("ActualHeight") { Source = MdiContainer, IsAsync = true};
 var width = new Binding("ActualWidth") { Source = MdiContainer ,IsAsync = true};
 _img.SetBinding(FrameworkElement.HeightProperty, height);
 _img.SetBinding(FrameworkElement.WidthProperty, width);

The problem is that height includes MdiContainer height with header height , and I need height of the MdiContainer without header height .

So I created converter in different class:

public class ImageSizeConvertor : IValueConverter
{
    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        return ((double) value - 1000);
    }

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

but when Im trying to add converter to binding value :

 var height = new Binding("ActualHeight") { Source = MdiContainer, IsAsync = true, Converter = ImageSizeConvertor};

I get error Class name is not valid at this point . How can I solve it?

Answer 1

我发现了错误） var height = new Binding("ActualHeight") { Source = MdiContainer, IsAsync = true, Converter = new ImageSizeConvertor() };