在 WPF 后面的代码中绑定 [英] Binding in code behind in WPF

问题描述

如何在后面的代码中添加绑定?

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>

我试过没有成功:

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

推荐答案

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...

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