Value cannot be null. Parameter name: format when using SeriesDescriptor and Legend

[StepTNT]

Quick code snippet:

 

1.public class Data
2.    {
3.        public int XValue{ get; set; }
4.
5.        public double YValue { get; set; }
6.
7.        public string Network { get; set; }
8.    }

 

 

01.<telerikPrimitives:RadLegendControl LegendProvider="{Binding ElementName=chart}"
02.                                            x:Name="legend"
03.                                            Grid.Row="0"
04.                                            >
05.            <telerikPrimitives:RadLegendControl.ItemsPanel>
06.                <ItemsPanelTemplate>
07.                    <StackPanel Orientation="Horizontal"/>
08.                </ItemsPanelTemplate>
09.            </telerikPrimitives:RadLegendControl.ItemsPanel>
10.        </telerikPrimitives:RadLegendControl>
11.        <telerikChart:RadCartesianChart x:Name="chart"
12.                                        PaletteName="DefaultLight"
13.                                        Grid.Row="1">
14.            <telerikChart:RadCartesianChart.VerticalAxis>
15.                <telerikChart:LinearAxis Maximum="100"
16.                                         Minimum="0"
17.                                         />
18.            </telerikChart:RadCartesianChart.VerticalAxis>
19.            <telerikChart:RadCartesianChart.HorizontalAxis>
20.                <telerikChart:LinearAxis
21.                                         RangeExtendDirection="Both"
22.                                         LastLabelVisibility="Hidden"/>
23.            </telerikChart:RadCartesianChart.HorizontalAxis>
24.
25.            <telerikChart:RadCartesianChart.SeriesProvider>
26.                <telerikChart:ChartSeriesProvider x:Name="provider">
27.                    <telerikChart:ChartSeriesProvider.SeriesDescriptors>
28.                        <telerikChart:ScatterSeriesDescriptor XValuePath="XValue"
29.                                                              YValuePath="YValue"
30.                                                              LegendTitlePath="Label">
31.                            <telerikChart:ScatterSeriesDescriptor.Style>
32.                                <Style TargetType="telerikChart:ScatterSplineAreaSeries">
33.                                    <Setter Property="ShowLabels" Value="True"/>
34.                                    <Setter Property="IsVisibleInLegend" Value="True"/>
35.                                    <Setter Property="Fill" Value="white"/>
36.                                    <Setter Property="CompositeMode" Value="MinBlend"/>
37.                                    <Setter Property="StrokeThickness" Value="2"/>
38.                                    <Setter Property="Opacity" Value="0.7"/>
39.                                    <Setter Property="StrokeLineJoin" Value="Round"/>
40.                                </Style>
41.                            </telerikChart:ScatterSeriesDescriptor.Style>
42.                        </telerikChart:ScatterSeriesDescriptor>
43.                    </telerikChart:ChartSeriesProvider.SeriesDescriptors>
44.                </telerikChart:ChartSeriesProvider>
45.            </telerikChart:RadCartesianChart.SeriesProvider>
46.        </telerikChart:RadCartesianChart>

[Tsvyatko]

Hi Stafeno,

Thank you for sending this code snippet. Based on it I have built sample project demonstrating how to setup chart and its legend. Please have a look at the attachment and let us know if this helps. If the setup does not represent the scenario specifics, could you modify it and send it back to us.

Regards,
Tsvyatko
Telerik