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Jamie
339
Style and Dependency Property Question
posted

I have a problem where I'd like to override the "BackgroundSelected" DP of the DataRecordCellArea class with my own implementation. e.g.

            <Style x:Key="rowStyle" TargetType="{x:Type igDP:DataRecordCellArea}">
                    <Setter Property="BackgroundSelected" Value="{Binding ElementName=ucMyDataGrid, Path=SelectedRowBackgroundColor}" />
            </Style>

This works fine when the property "SelectedRowBackgroundColor" has been set, but when it's value is still null I would like to use the original value of DP "BackgroundSelected", that the underlying Theme applied. Shouldn't this be possible with a dependency property?

I've also tried referencing the theme's style for DataRecordCellArea, but the style's "setters" collection doesn't let you reference a setter by property name, only index.

Any ideas appreciated,

Jamie

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  • 6867
    Verified Answer
    posted

    You could try using an IValueConverter on that Binding.  The converter would return Binding.DoNothing if your BackgroundSelected property has not been set.  Returning Binding.DoNothing from a value converter basically tells WPF to not push any value to the binding source/target.  It cancels the operation, which should allow the default color to be picked up.

    Josh

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