问禁用WPF DataGrid上的行编辑

EN

<DataGrid ItemsSource="{Binding Path=Combustibles}" AutoGenerateColumns="False" SelectedItem="{Binding Path=SelectedCombustible}">
    <DataGrid.Resources>
        <Style TargetType="{x:Type DataGridRow}">
            <Style.Triggers>
                <DataTrigger Binding="{Binding IsReadOnly}" Value="True" >
                    <Setter Property="IsEnabled" Value="False" />                                
                </DataTrigger>
            </Style.Triggers>
        </Style>
    </DataGrid.Resources>
</DataGrid>

public class CombustiblesViewModel: BaseViewModel
{        
    public List<CombustiblesWCFModel> Combustibles{ get; set; }

    private CombustiblesWCFModel _selectedcombustible = new CombustiblesWCFModel();

    public CombustiblesViewModel()
    {
        Combustibles = _svc.Combustibles_List(sTicket);
        Combustibles[1].IsReadOnly = true;
    }            

    public CombustiblesWCFModel SelectedCombustible
    {
        get
        {
            return this._selectedcombustible;
        }

        set
        {
            this._selectedcombustible = value;
            NotifyOfPropertyChange("SelectedCombustible");                
        }
    }
}

public partial class CombustiblesWCFModel
{
    public Boolean IsReadOnly { get; set; }
}