Binding in code behind in WPF

Question

How can I add a binding in code behind?

 <Canvas.Effect >
      <fx:GreenscreenEffect Tolerance="{Binding Value, ElementName=sliderGreenscreenTolerance}" 
                            ColorR="{Binding Value, ElementName=sliderGreenscreenR}"
                            ColorG="{Binding Value, ElementName=sliderGreenscreenG}"
                            ColorB="{Binding Value, ElementName=sliderGreenscreenB}" />
 </Canvas.Effect>

I tried without success:

GreenscreenEffect effect = new GreenscreenEffect() ;
Binding binding = new Binding();
binding.Path = new PropertyPath("Tolerance");
binding.Source = sliderGreenscreenTolerance.Value; 
BindingOperations.SetBinding(effect, TextBlock.TextProperty, binding);
// etc. for each property

https://stackoverflow.com/questions/7525185/how-to-set-a-binding-in-code — CAD bloke, Oct 18 '18 at 02:12

alek kowalczyk · Accepted Answer · 2017-01-06T22:00:47.093

GreenscreenEffect effect = new GreenscreenEffect() ;
Binding binding = new Binding();
binding.Path = new PropertyPath("Value");
binding.Source = sliderGreenscreenTolerance; 
// effect.SetBinding(GreenscreenEffect.ToleranceProperty, binding);
// Commented above out since GreenscreenEffect is not a FrameworkElement, thus:
BindingOperations.SetBinding(effect, GreenscreenEffect.ToleranceProperty, binding);
// ... ColorRProperty etc...

score 0 · Answer 2 · answered Jan 05 '17 at 23:07

0

I found the solution:

  GreenscreenEffect effect = new GreenscreenEffect() ;
                Binding binding = new Binding();
                binding.Path = new PropertyPath("Value");
                binding.Source = sliderGreenscreenTolerance; 
                BindingOperations.SetBinding(effect, GreenscreenEffect.ToleranceProperty, binding);

answered Jan 05 '17 at 23:07

daniel

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you found it as I was typing :) just letting know that you can use the `SetBinding` method on the control instead of the one in `BindingOperations` – alek kowalczyk Jan 05 '17 at 23:11

Binding in code behind in WPF

2 Answers2

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