无论颜色如何，如何更改整个行的不透明度？

Question

I have a certain data-grid consisted of TextColumns and each of the cells differ in color. I am basing my color on certain data and because of this I have set the cell's background color appropriately. The issue that came from this is that now when I select a row, there is no way to see if it is selected. I dont want to dim each cell's color when I select the row, because I have a lot of columns. I just want to adjust the opacity of he selected row and not thing about the colors in individual cells. This is what I have tried:

<DataGrid.Resources>
    <Style TargetType="DataGridRow">
        <Style.Triggers>
            <Trigger Property="IsSelected" Value="True">
                <Setter Property="Background">
                    <SolidColorBrush Opacity="0.3"/>
                </Setter>
            </Trigger>
        </Style.Triggers>
    </Style>
</DataGrid.Resources>

But I get the error: Unexpected record in Baml stream. Trying to add to Setter which is not a collection or has a TypeConverter. Unexpected record in Baml stream. Trying to add to Setter which is not a collection or has a TypeConverter. Is there a way to acheive my expected result?

Answer 1

You should set the Value (note the <Setter.Value> element) property to a SolidColorBrush :

<Trigger Property="IsSelected" Value="True">
    <Setter Property="Background">
        <Setter.Value>
            <SolidColorBrush Opacity="0.3"/>
        </Setter.Value>
    </Setter>
</Trigger>

You may also want to change the TargetType to DataGridCell for the background to be applied to the selected cells.