WPF DataGrid selected row style

I'm stuck with one very stupid problem - need to style selected row in WPF DataGrid.

I want to show a rectangle with blue border instead of just filling entire row with some color.

Any ideas how to implement this? It just must be some way to make it pretty easy.

Use CellStyle and RowStyle on DataGrid. DataGridCell and DataGridRow both have IsSelected property that can be used in a Trigger to find out if they are selected.

Something like following should do the trick:

<DataGrid.CellStyle>
    <Style TargetType="DataGridCell">
        <Style.Triggers>
            <Trigger Property="IsSelected"
                        Value="True">
                <Setter Property="Background"
                        Value="White" />
                <Setter Property="Foreground"
                        Value="Black" />
            </Trigger>
        </Style.Triggers>
    </Style>
</DataGrid.CellStyle>
<DataGrid.RowStyle>
    <Style TargetType="DataGridRow">
        <Style.Triggers>
            <Trigger Property="IsSelected"
                        Value="True">
                <Setter Property="BorderBrush"
                        Value="Blue" />
                <Setter Property="BorderThickness"
                        Value="2" />
            </Trigger>
        </Style.Triggers>
    </Style>
</DataGrid.RowStyle>

Just play around until you get it right.

I like this one:

<Style TargetType="{x:Type DataGridRow}">
    <Setter Property="BorderBrush" Value="LightGray" />
    <Setter Property="BorderThickness" Value="1" />
    <Style.Triggers>
        <Trigger Property="IsSelected" Value="True">
            <Setter Property="BorderBrush" Value="Blue" />
        </Trigger>
    </Style.Triggers>
    <Style.Resources>
        <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Transparent" />
        <SolidColorBrush x:Key="{x:Static SystemColors.HighlightTextBrushKey}" Color="Black" />
    </Style.Resources>
</Style>

try this

<DataGrid.Resources>
    <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Transparent"/>

    <Style TargetType="{x:Type DataGridRow}">
        <Setter Property="HeaderStyle">
            <Setter.Value>
                <Style TargetType="{x:Type DataGridRowHeader}">
                    <Setter Property="Visibility" Value="Collapsed"/>
                    <Setter Property="Width" Value="0"/>
                </Style>
            </Setter.Value>
        </Setter>
        <Setter Property="Background" Value="{DynamicResource {x:Static SystemColors.WindowBrushKey}}"/>
        <Setter Property="SnapsToDevicePixels" Value="true"/>
        <Setter Property="Validation.ErrorTemplate" Value="{x:Null}"/>
        <Setter Property="ValidationErrorTemplate">
            <Setter.Value>
                <ControlTemplate>
                    <TextBlock Foreground="Red" Margin="2,0,0,0" Text="!" VerticalAlignment="Center"/>
                </ControlTemplate>
            </Setter.Value>
        </Setter>

        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type DataGridRow}">
                    <Border x:Name="DGR_Border" BorderThickness="1" CornerRadius="5" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
                        <SelectiveScrollingGrid>
                            <SelectiveScrollingGrid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                            </SelectiveScrollingGrid.ColumnDefinitions>
                            <Grid Grid.Column="1">
                                <Grid.RowDefinitions>
                                    <RowDefinition Height="*"/>
                                    <RowDefinition Height="Auto"/>
                                </Grid.RowDefinitions>
                                <DataGridCellsPresenter ItemsPanel="{TemplateBinding ItemsPanel}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
                                <DataGridDetailsPresenter Margin="4" Grid.Row="1" SelectiveScrollingGrid.SelectiveScrollingOrientation="{Binding AreRowDetailsFrozen, ConverterParameter={x:Static SelectiveScrollingOrientation.Vertical}, Converter={x:Static DataGrid.RowDetailsScrollingConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}" Visibility="{TemplateBinding DetailsVisibility}"/>

                                <Border BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Grid.RowSpan="2"/>
                            </Grid>
                            <DataGridRowHeader SelectiveScrollingGrid.SelectiveScrollingOrientation="Vertical" Visibility="{Binding HeadersVisibility, ConverterParameter={x:Static DataGridHeadersVisibility.Row}, Converter={x:Static DataGrid.HeadersVisibilityConverter}, RelativeSource={RelativeSource AncestorType={x:Type DataGrid}}}"/>
                        </SelectiveScrollingGrid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsSelected" Value="True">
                            <Setter TargetName="DGR_Border" Property="BorderBrush" Value="Blue"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="DetailsVisibility" Value="Visible">
                <Setter Property="BorderThickness" Value="4,1,4,4"/>
                <Setter Property="BorderBrush" Value="#FF3886B9"/>
            </Trigger>
            <!--<Trigger Property="IsSelected" Value="True">
                <Setter Property="BorderBrush" Value="Blue"/>
            </Trigger>-->
        </Style.Triggers>
    </Style>

</DataGrid.Resources>