The following example demonstrates how to provide, through a style, a new ControlTemplate for the DataCells that will display the cells as buttons.

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XAML
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<Grid xmlns:xcdg="http://schemas.xceed.com/wpf/xaml/datagrid">
  <Grid.Resources>
    <Style TargetType="{x:Type xcdg:DataCell}">
      <Setter Property="Template">
        <Setter.Value>
          <ControlTemplate TargetType="{x:Type xcdg:DataCell}">
            <Button>
              <Button.Content>
                <ContentPresenter/>
              </Button.Content>
            </Button>
          </ControlTemplate>
        </Setter.Value>
      </Setter>
    </Style>
    <xcdg:DataGridCollectionViewSource x:Key="cvs_orders"
                                    Source="{Binding Source={x:Static Application.Current},
                                                      Path=Orders}"/>
   </Grid.Resources>
   <xcdg:DataGridControl x:Name="OrdersGrid"
                         ItemsSource="{Binding Source={StaticResource cvs_orders}}"/>
</Grid>