Camera extension to RadChart works the first time and not on setting the item source later

[Jinith]

Hello there,

 

 I have a rad chart which takes the definition as below :

 

 <telerik:RadChart x:Name="rd3DChart" IsManipulationEnabled="True"  Height="250"  Margin="5,5,5,5" Grid.Row="4" Grid.Column="0" Grid.ColumnSpan="3">
                    <telerik:RadChart.DefaultView>
                        <telerik:ChartDefaultView>
                        </telerik:ChartDefaultView>
                    </telerik:RadChart.DefaultView>
                    <telerik:RadChart.SeriesMappings>
                        <telerik:SeriesMapping>
                            <telerik:SeriesMapping.SeriesDefinition>
                                <telerik:Pyramid3DSeriesDefinition ShowItemLabels="True" ItemLabelFormat="#YValue" ShowItemToolTips="True" ItemToolTipFormat="#XValue - #YValue">
                                </telerik:Pyramid3DSeriesDefinition>
                            </telerik:SeriesMapping.SeriesDefinition>
                            <telerik:SeriesMapping.ItemMappings>
                                <telerik:ItemMapping FieldName="YValue"
DataPointMember="YValue" />
                                <telerik:ItemMapping FieldName="XValue"
DataPointMember="Label" />
                            </telerik:SeriesMapping.ItemMappings>
                        </telerik:SeriesMapping>
                    </telerik:RadChart.SeriesMappings>
                </telerik:RadChart>

 

I have a function which binds the values to the chart  like :

 

        private void PopulateAggregationChart()
        {
            rdAggregateExpanderGraph.Visibility = System.Windows.Visibility.Visible;

            List<AggregateChartItem> charItems = new List<AggregateChartItem>();
            AggregateChartItem temp = null;

            rd3DChart.ItemsSource = null;

             charItems = GetItemsToBindToChart();

               CameraExtension cam = new CameraExtension();
               cam.ZoomEnabled = true;
               if (rd3DChart.DefaultView.ChartArea.Extensions.Count == 0)
                rd3DChart.DefaultView.ChartArea.Extensions.Add(cam);

            rd3DChart.ItemsSource = charItems;

}

 

I have added a check here on the extensions as clearing it and adding it again threw null reference exception. My Binding works the first time, but when I call this function to bind the graph with a different set of data, the graph is being painted as expected, but the camera extension is not applied to it.

 

Please help in how I can retain the camera extension throughout.

[Peshito]

Hello Jinith,

It is hard to tell what might be causing this exception from the code snippet provided. I tried to reproduce it but to no avail. Would it be possible for you to give us a sample runnable project reproducing the issue. As this is a forum thread you should use a third party web side for files sharing or submit a support ticket where attaching files is allowed.

In the meantime I have a attached a sample project similar to the one you described in order to help you tracking down what might be causing the exception.

Regards,
Peshito
Telerik

[Jinith]

Hello Peshito,

  I have raised a support ticket with ID "942612", attaching the same application which you have created with a refresh on item source, and I could reproduce that the camera extension was getting detached from the chart. Please have a look.

[Peshito]

Hi Jinith,

Thank you for providing an updated version of the sample project in the support ticket thread.

I wasn't able to reproduce the sample and attached the same project with the DLLs version I used. Please find more information on the matter in the ticket.

Regards,
Peshito
Telerik