Runtime Error with CustomGridLine

[müller]

Hi,
I get a runtime error if i do somthing like this:

<chart:RadChart x:Name="RadChart1">
           <chart:RadChart.DefaultView>
               <charting:ChartDefaultView ChartLegendPosition="Top">
                   <charting:ChartDefaultView.ChartLegend>
                       <charting:ChartLegend x:Name="PrimaryLegend" Header="Click on country to hide/show:" LegendItemMarkerShape="Square"  Foreground="Black" HeaderFontWeight="Normal" FontFamily="Segoe UI" />
                   </charting:ChartDefaultView.ChartLegend>
                   <charting:ChartDefaultView.ChartArea>
                       <charting:ChartArea Padding="5,10,20,5" LabelFormatBehavior="None" LegendName="PrimaryLegend">
                           <charting:ChartArea.Annotations>
                               <charting:CustomGridLine YIntercept="3"
                                                           Visibility="Visible"
                                                           Stroke="Red"
                                                           StrokeThickness="3"/>

                           </charting:ChartArea.Annotations>

                               <charting:ChartArea.AxisY>
                               <charting:AxisY ExtendDirection="None"  />
                           </charting:ChartArea.AxisY>
                           <charting:ChartArea.DataSeries>
                               <charting:DataSeries LegendLabel="EU-27">
                                   <charting:DataSeries.Definition>
                                       <charting:LineSeriesDefinition ItemLabelFormat="0.#" >
                                           <charting:LineSeriesDefinition.LabelSettings>
                                               <charting:LabelSettings ShowConnectors="True" />
                                           </charting:LineSeriesDefinition.LabelSettings>
                                       </charting:LineSeriesDefinition>
                                   </charting:DataSeries.Definition>
                                   <charting:DataPoint YValue="0" XValue="1998" />
                                   <charting:DataPoint YValue="0" XValue="1999" />
                               </charting:DataSeries>
                           </charting:ChartArea.DataSeries>
                       </charting:ChartArea>
                   </charting:ChartDefaultView.ChartArea>
               </charting:ChartDefaultView>
           </chart:RadChart.DefaultView>
       </chart:RadChart>

[Nikolay]

Hello Müller,

The error is caused because you only have '0' values, but the Y interception line is drawn at a higher Y axis value. In such a scenario the best approach would be to set the YAxis AutoRange property to false and define a manual range. You can do this initially or on ItemDataBound event when having only 0 values.

Best wishes,
Nikolay
the Telerik team