How to change the text color for an unchecked row in xaml

Question

I would like to gray out the text associated to an unchecked row in my application using xaml. I tried the following, but it is getting overwritten:

<DataGridTemplateColumn.CellTemplate>
   <DataTemplate>
      <CheckBox Name="cbkSelect" 
                IsChecked="{Binding Path=IsSelectedForOrder, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
         <CheckBox.Style>
            <Style TargetType="{x:Type CheckBox}">
               <Setter Property="Visibility" Value="Hidden"/>
               <Style.Triggers>
                  <Trigger Property="IsChecked" Value="False">
                     <Setter Property="Foreground" Value="Gray"/>
                  </Trigger>
                  <DataTrigger Binding="{Binding IsMouseOver, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True">
                     <Setter Property="Visibility" Value="Visible"/>
                  </DataTrigger>
               </Style.Triggers>
            </Style>
         </CheckBox.Style>
      </CheckBox>
   </DataTemplate>
</DataGridTemplateColumn.CellTemplate>

Answer 1

As the Foreground color should be applied to all cells of a given row, you can remove the trigger. The trigger inside the CellTemplate will only apply to to the CheckBox that the style is applied to.

<DataGridTemplateColumn.CellTemplate>
   <DataTemplate>
      <CheckBox Name="cbkSelect" 
                IsChecked="{Binding Path=IsSelectedForOrder, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
         <CheckBox.Style>
            <Style TargetType="{x:Type CheckBox}">
               <Setter Property="Visibility" Value="Hidden"/>
               <Style.Triggers>
                  <DataTrigger Binding="{Binding IsMouseOver, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True">
                     <Setter Property="Visibility" Value="Visible"/>
                  </DataTrigger>
               </Style.Triggers>
            </Style>
         </CheckBox.Style>
      </CheckBox>
   </DataTemplate>
</DataGridTemplateColumn.CellTemplate>

If you want to apply the foreground color in normal state, but not in selected state, add this RowStyle.

<DataGrid.RowStyle>
   <Style TargetType="{x:Type DataGridRow}" BasedOn="{StaticResource {x:Type DataGridRow}}">
      <Style.Triggers>
         <DataTrigger Binding="{Binding IsSelectedForOrder}" Value="True">
            <Setter Property="Foreground" Value="Gray"/>
         </DataTrigger>
      </Style.Triggers>
   </Style>
</DataGrid.RowStyle>

If you want to apply the style in selected state, too, add this CellStyle. In this case a RelativeSource binding is used to access the data context of the row which contains IsSelectedForOrder.

<DataGrid.CellStyle>
   <Style TargetType="{x:Type DataGridCell}" BasedOn="{StaticResource {x:Type DataGridCell}}">
      <Style.Triggers>
         <DataTrigger Binding="{Binding DataContext.IsSelectedForOrder, RelativeSource={RelativeSource AncestorType={x:Type DataGridRow}}}" Value="True">
            <Setter Property="Foreground" Value="Gray"/>
         </DataTrigger>
      </Style.Triggers>
   </Style>
</DataGrid.CellStyle>