Set ItemMapping FieldName Property By DataBinding

[Martyn]

Hi,

In my RadChart, I currently set the FieldName of the SeriesMapping.ItemMapping statically. However, I want to be able to change which field within the dataset is being plotted dynamically at runtime.

I've set the FieldName to be set with a binding and the chart initially draws, but, when I change the property being bound to, the chart does not re-draw to reflect this change.

<telerik:SeriesMapping>
                            <telerik:SeriesMapping.SeriesDefinition>
                                <telerik:StackedBarSeriesDefinition ShowItemToolTips="True" ItemToolTipFormat="{StaticResource HomeDealerChartCurrTooltip}"
                                                             ItemLabelFormat="{StaticResource OverspendTooltipLabelFormat}" ItemStyle="{StaticResource StackedBarDefaultStyle}">
                                    <telerik:StackedBarSeriesDefinition.InteractivitySettings>
                                        <telerik:InteractivitySettings HoverScope="Series" SelectionScope="Item" />
                                    </telerik:StackedBarSeriesDefinition.InteractivitySettings>
                                </telerik:StackedBarSeriesDefinition>
                            </telerik:SeriesMapping.SeriesDefinition>

                            <telerik:SeriesMapping.ItemMappings>
                                <telerik:ItemMapping FieldName="OverspendToDate" DataPointMember="YValue" />
                                <telerik:ItemMapping FieldName="{Binding SelectedMeasure}" DataPointMember="XCategory" />
                            </telerik:SeriesMapping.ItemMappings>
                        </telerik:SeriesMapping>

Am I missing something?

Thanks for any help,

Martyn.

[Petar Marchev]

Hi Martyn,

The ItemMappingCollection does not implement the INotifyItemChanged interface, hence it does not track changes in the items' properties. This means that you are not doing anything wrong, its just that this behavior is not expected.

You can either create a new SeriesMapping and add it to the SeriesMappings collection (and remove the old mapping) or you need to call the Rebind method of the chart when you update the ItemMapping. 

Greetings,
Petar Marchev
the Telerik team