Hi,

I have a content page which I want to show based on a value being not null and I am using a converter for that.

Here is the code:

<igDock:SplitPane igDock:SplitPane.RelativeSize="100,100" SplitterOrientation="Vertical" >
                        <igDock:ContentPane TabHeader="ViewerContentPane"
                                        x:Name="MyPane"
                                        >
                            <igDock:ContentPane.Header>
                                <TextBlock>
                                <Run Text="Second Grid"/>
                                </TextBlock>
                            </igDock:ContentPane.Header>
                            <igDP:XamDataGrid BindToSampleData="True" FieldLayoutInitialized="XamDataGrid_FieldLayoutInitialized"/>
                        </igDock:ContentPane>
                        <igDock:ContentPane TabHeader="Viewer" AllowClose="True"
                                        x:Name="ViewerPane" MinWidth="200" AutomationProperties.AutomationId="MyViewerPane"
                                        Header="Viewer" >
                            <igDock:ContentPane.Style>
                                <Style>
                                    <Setter Property="igDock:ContentPane.Visibility" Value="Collapsed"/>
                                    <Style.Triggers>
                                        <DataTrigger Binding="{Binding Path=Tag, ElementName=MyViewer, Converter={StaticResource isNullConverter}}" Value="False">
                                            <Setter Property="igDock:ContentPane.Visibility" Value="Visible"/>
                                        </DataTrigger>
                                    </Style.Triggers>
                                </Style>
                            </igDock:ContentPane.Style>
                            <ContentControl x:Name="MyViewer"></ContentControl>
                        </igDock:ContentPane>
                    </igDock:SplitPane>

here is the converter:

public class IsNullConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            return (value == null);
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new InvalidOperationException("IsNullConverter can only be used OneWay.");
        }
    }

Will appreciate your help.

Thanks,

Imad.