How to Bind Color of VerticalGridLinesBrush to color of a Background Button in WPF?

Question

I'm using C# WPF and MaterialDesign Theme,

the Color Binding works as well, but I want to bind the Opacity property of VerticalGridLinesBrush to the Opacity property of that button

why-color-binding-doesnt-work-for-horizontalgridlinesbrush-in-datagrid-in-wpf

Answer 1

The type of Background property of Control is Brush. There are a variety of Brushes and SolidColorBrush is one of them.
For the current value of Background to be SolidColorBrush, its Color property can be referenced in the binding.

<StackPanel>  
        <Slider Width="200" Minimum="0" Maximum="1" Value="{Binding ElementName=MY_BUTTON, Path=Opacity}"/>  
                <Button x:Name="MY_BUTTON"   Content="button"  Width="100" Height="50" Background="Red"/>  
          <DataGrid>  
            <DataGrid.HorizontalGridLinesBrush>  
                            <SolidColorBrush Color="{Binding ElementName=MY_BUTTON,Path=Background.Color}"  Opacity="{Binding ElementName=MY_BUTTON,Path=Opacity}"/>  
                        </DataGrid.HorizontalGridLinesBrush>  
    ...  
    </DataGrid>  
</StackPanel>  

The result:

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