Style.Triggers with property Template in WPF

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I want to set a style for my DataGrid, but I do not know where is the problem
the backgroud property does not work with its value in the presence of the Template property.

my code:

XML

<Window.Resources>

        <Style x:Key="DataGridStyle1" TargetType="{x:Type DataGrid}">
            <Setter Property="CellStyle" Value="{DynamicResource GridStyle1}"/>
        </Style>

XML

<Style x:Key="GridStyle1" TargetType="DataGridCell">
            <Style.Triggers>
                <Trigger Property="IsSelected" Value="True" >
                    <Setter Property="Background" Value="SeaGreen"/>
                </Trigger>
            </Style.Triggers>
            <Style.Setters>
            <Setter Property="Template">

XML

<Setter.Value>
                    <ControlTemplate TargetType="{x:Type DataGridCell}">
                        <Border Name="DataGridCellBorder">
                            <ContentControl Content="{TemplateBinding Content}">
                                <ContentControl.ContentTemplate>

XML

</Window.Resources>


<DataGrid Style="{DynamicResource DataGridStyle1}" AutoGenerateColumns="True" SelectionChanged="grid_Pr_SelectionChanged"/>

Help me please.

</Style.Setters>
</Style>

Posted 1-Mar-14 7:06am

nasrsoft

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tgrt · Accepted Answer · 2014-03-01T11:33:00

I cannot tell you the reasons it works the way it does, but I can help you fix what is wrong. Essentially, your template is overriding your cell style.

I bet if you remove the whole template section it'll work. But, assuming you want the behavior, you'll have to add it within the control template. The binding is a little more complicated.

<DataTemplate>
    <TextBlock TextWrapping="WrapWithOverflow"
                TextTrimming="CharacterEllipsis" Height="Auto" Width="Auto"
                Text="{Binding Text}">
        <TextBlock.Style>
            <Style TargetType="{x:Type TextBlock}">
                <Style.Triggers>
                    <DataTrigger Binding="{Binding IsSelected, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type DataGridCell}}}" Value="True">
                        <Setter Property="Background" Value="SeaGreen" />
                    </DataTrigger>
                </Style.Triggers>
            </Style>
        </TextBlock.Style>
    </TextBlock>
</DataTemplate>

P.S. You should be using StaticResource not DynamicResource. You don't need it here, and you're incurring a little more overhead because of it.