One way to source binding is not being set

Question

I'm attempting to bind to a readonly property on a third party control (so no control over the implementation of the property). As I understand, I need to do this as a onewaytosource binding type, and also need to do it in code.

I have the following code to set the binding:

            Binding svBinding = new Binding();
        svBinding.Path = new PropertyPath("SurfaceScrollViewer");
        svBinding.Source = DataContext;
        svBinding.Mode = BindingMode.OneWayToSource;
        Ds.SetBinding(DiagramSurface.ScrollViewerProperty, svBinding);

And my property implementation on the view model:

public DiagramScrollViewer SurfaceScrollViewer
    {
        get
        {
            return surfaceScrollViewer;
        }
        set
        {
            surfaceScrollViewer = value;
        }
    }

    private DiagramScrollViewer surfaceScrollViewer;

I can access other properties in the same data context by code, but for some reason, I cannot get this property to bind. Can anyone see where I'm going wrong?

do you get an error in the output window? – MikeKulls Jul 16 '12 at 00:21 — MikeKulls, Jul 16 '12 at 00:21

score 0 · Answer 1 · answered Jul 16 '12 at 03:35

0

It doesn't work, because it is a bug of wpf. Take a look of this http://meleak.wordpress.com/2011/08/28/onewaytosource-binding-for-readonly-dependency-property/

answered Jul 16 '12 at 03:35

Eugene Petrov

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score 0 · Answer 2 · edited May 23 '17 at 12:04

0

Hi I misunderstood your question Sorry. It is a kind of bug in wpf for binding ReadOnly properties with OneWayToSource BindingMode you can get exact answer for this is here

edited May 23 '17 at 12:04

Community

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answered Jul 16 '12 at 03:44

yo chauhan

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This won't help because the Target is readonly. The idea is to have the property in the viewmodel updated when the property is changed. Not the other way around. – MikeKulls Jul 16 '12 at 04:08

One way to source binding is not being set

2 Answers2