Set value of DependencyProperty and preserve OneWayToSource-Binding

Question

If I have a DependencyObject with a OneWayToSource Binding set on one property and then try to set the DP's value again, the Binding is being removed. I can not use the 'reversed' way with a direct (normal) Binding, so I have to use a OneWayToSource Binding. My question is whether there is another way to achieve this.

score 2 · Accepted Answer · answered Dec 17 '13 at 15:36

2

Let me see if I understand correctly, you have something like this:

<SomeControl x:Name="MyControl" MyProp="{Binding Something, Mode="OneWayToSource"}".../>

Then, in code-behind, you try to set MyProp to some other value

MyControl.MyProp = SomethingElse;

And now changes to MyProp are not updating Something because binding is removed. Right?

In that case, and if you work under .NET 4.0 or above, you can use SetCurrent:

MyControl.SetCurrent(MyPropProperty, SomethingElse);

answered Dec 17 '13 at 15:36

XAMeLi

6,189
2
22
29

Great! I would never have found this. I wonder whether there is a way in other .NET versions... – HerpDerpington Dec 17 '13 at 15:47
1

Was added at 4.0. It was greatly missed till then. IIRC, there were some ways but they were messy. – XAMeLi Dec 17 '13 at 22:22

Set value of DependencyProperty and preserve OneWayToSource-Binding

1 Answers1