Hello Anne,

I have been looking into your question and the easiest way to achieve the desired functionality is to use a style for the TimeslotPresenter and setting the ‘Background’ on specific condition using value converter like e.g. :

<Style TargetType="igSchedulePrim:TimeslotPresenter">

                <Setter Property="Template">

                    <Setter.Value>

                        <ControlTemplate TargetType="igSchedulePrim:TimeslotPresenter">

                            <Grid>

                                <Border x:Name="Border"

                                                BorderBrush="{TemplateBinding ComputedBorderBrush}"

                                                BorderThickness="{Binding Path=Orientation, RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource tsOrientationToThicknessConverter}}"

                                                Background="{Binding RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource con}}"

                                                Padding="{TemplateBinding Padding}"

                                                igPrim:XamlHelper.SnapsToDevicePixels="True">

                                </Border>

                                <Border x:Name="DayBorder"

                                                BorderBrush="{TemplateBinding DayBorderBrush}"

                                                BorderThickness="{TemplateBinding DayBorderThickness}"

                                                Visibility="{TemplateBinding DayBorderVisibility}"

                                                igPrim:XamlHelper.SnapsToDevicePixels="True">

                                </Border>

                            </Grid>

                        </ControlTemplate>

                    </Setter.Value>

                </Setter>

            </Style>

…

    public class MyConverter : IValueConverter

    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            DateTime start = (value as TimeRangePresenterBase).Start;

            DateTime end = (value as TimeRangePresenterBase).End;

            if (start.Hour == 9 && start.Minute == 15 && end.Hour == 9 && end.Minute == 30)

            {

                return Brushes.Red;

            }

            if (start.Hour == 15 && start.Minute == 30 && end.Hour == 15 && end.Minute == 45)

            {

                return Brushes.Yellow;

            }

            return Brushes.Transparent;

        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            return value;

        }

    }

Let me know, if you need any further assistance on this matter.