No Data Series

[Mark]

Graph shows No Data Series:

                        <telerik:RadChart x:Name="radOASHistory" Grid.Row="1" Margin="0,0,0,0" UseLayoutRounding="True" BorderThickness="0"
                                               VerticalAlignment="Top" VerticalContentAlignment="Stretch" HorizontalAlignment="Left" HorizontalContentAlignment="Stretch"
                                               Height="500" Width="1300" MinHeight="300" MinWidth="700" MaxHeight="700" MaxWidth="1300"
                                       >
                            <telerik:RadChart.DefaultView>
                                <telerik:ChartDefaultView>
                                    <telerik:ChartDefaultView.ChartArea>
                                        
                                        <telerik:ChartArea>

                                            <telerik:ChartArea.AxisX>
                                                <telerik:AxisX AutoRange="True" />
                                            </telerik:ChartArea.AxisX>
                                            
                                            <telerik:ChartArea.AxisY>
                                                <telerik:AxisY Title="OAS [bp/yr]" AxisLabelsVisibility="Collapsed" />
                                            </telerik:ChartArea.AxisY>

                                            <telerik:ChartArea.AdditionalYAxes>
                                                <telerik:AxisY AutoRange="True"/>
                                            </telerik:ChartArea.AdditionalYAxes>

                                        </telerik:ChartArea>
                                    </telerik:ChartDefaultView.ChartArea>
                                </telerik:ChartDefaultView>
                            </telerik:RadChart.DefaultView>

                            <telerik:RadChart.SeriesMappings>
                                <telerik:SeriesMapping>
                                    <telerik:SeriesMapping.SeriesDefinition>
                                        <telerik:LineSeriesDefinition ShowItemLabels="False" ShowPointMarks="False" />
                                    </telerik:SeriesMapping.SeriesDefinition>
                                    <telerik:SeriesMapping.ItemMappings>
                                        <telerik:ItemMapping DataPointMember="YValue" />
                                    </telerik:SeriesMapping.ItemMappings>
                                </telerik:SeriesMapping>
                            </telerik:RadChart.SeriesMappings>

                        </telerik:RadChart>

        public void ProcessChart(ObservableCollection<PcyaSimServiceReference.PCYAsimServiceHistoryItem> results)
        {
            if (results                                                     == null)
                return;

            _data                                                            = results;

            radOASHistory.SeriesMappings.Clear();
            radOASHistory.DefaultView.ChartArea.DataSeries.Clear();

            foreach (PcyaSimServiceReference.PCYAsimServiceHistoryItem hi in results)
            {
                DataSeries lineSeries                                        = new DataSeries();
                lineSeries.Definition                                        = new LineSeriesDefinition { ShowItemLabels = false, ShowPointMarks = false };

                foreach (CorporateBondCalculator.PcyaSimServiceReference.PCYAsimServiceHistoryRung item in hi.OAS)
                {
                    lineSeries.Add(new Telerik.Windows.Controls.Charting.DataPoint() { YValue = item.Value, XValue = item.PriceDate.ToOADate() });
                }

                SeriesMapping seriesMapping                                  = new SeriesMapping();
                seriesMapping.LegendLabel                                    = hi.Description;
                seriesMapping.SeriesDefinition                               = lineSeries.Definition;

                seriesMapping.ItemMappings.Add(new ItemMapping("PriceDate", DataPointMember.XValue));
                seriesMapping.ItemMappings.Add(new ItemMapping("Value", DataPointMember.YValue));
                seriesMapping.ItemMappings.Add(new ItemMapping("Label", DataPointMember.Label));

                radOASHistory.SeriesMappings.Add(seriesMapping);

                radOASHistory.DefaultView.ChartArea.AxisX.IsDateTime         = true;
                radOASHistory.DefaultView.ChartArea.AxisX.LayoutMode         = AxisLayoutMode.Inside;
                radOASHistory.DefaultView.ChartArea.AxisX.DefaultLabelFormat = "MM/dd/yyyy";
                radOASHistory.DefaultView.ChartArea.AxisX.LabelRotationAngle = 45;

                radOASHistory.DefaultView.ChartArea.DataSeries.Add(lineSeries);
            }

[Petar Kirov]

Hello Mark,

I examined your code and here are my suggestions:

• You don't need to manually add all of the DataPoints to each of the series. Just set each SeriesMapping an ItemSource and the RadChart will handle the rest: 
  foreach (var hi in results) 

  //var is PcyaSimServiceReference.PCYAsimServiceHistoryItem

  {

      SeriesMapping seriesMapping = new SeriesMapping();

      seriesMapping.SeriesDefinition = new LineSeriesDefinition();

      //adding ItemMapping-s to current SeriesMapping:

      //seriesMapping.ItemMappings.Add(...)


   

      /*NEW*/ seriesMapping.ItemsSource = hi.OAS;

   

      radOASHistory.SeriesMappings.Add(seriesMapping);

  } 
• That said you also don't need to manually add DataSeries to the RadChart, because when a SeriesMapping has an ItemSource it handles that for you. Either use the approach with SeriesMapping(s) (easier) or use the DataSeries, because they can't work at same time.
• When specifying a seriesMapping.SeriesDefinition you can just set it to a new SeriesDefinition as shown in the above code snippet.
• You can delete the SeriesMapping(s) from the XAML, because they are redundant when you are actually adding them in code behind.

Here is a modified version of your ProcessChart method:

public void ProcessChart(

    ObservableCollection<PcyaSimServiceReference.PCYAsimServiceHistoryItem> results)

{

    if (results == null) return;

    _data = results;

 

    //If your setting the Chart only once these two lines are not needed:

    radOASHistory.SeriesMappings.Clear();

    radOASHistory.DefaultView.ChartArea.DataSeries.Clear();

    //

 

    foreach (var hi in results)

        //var is PcyaSimServiceReference.PCYAsimServiceHistoryItem

    {

        //DataSeries lineSeries                                        = new DataSeries();

        //lineSeries.Definition                                        = new LineSeriesDefinition { ShowItemLabels = false, ShowPointMarks = false };

 

        //foreach (CorporateBondCalculator.PcyaSimServiceReference.PCYAsimServiceHistoryRung item in hi.OAS)

        //{

        //    lineSeries.Add(new Telerik.Windows.Controls.Charting.DataPoint() { YValue = item.Value, XValue = item.PriceDate.ToOADate() });

        //}

 

        SeriesMapping seriesMapping = new SeriesMapping();

        seriesMapping.LegendLabel   = hi.Description;

        seriesMapping.SeriesDefinition = /*lineSeries.Definition*/
    new LineSeriesDefinition { ShowItemLabels = false, ShowPointMarks = false };

 

        seriesMapping.ItemMappings.Add(
        new ItemMapping("PriceDate", DataPointMember.XValue));

        seriesMapping.ItemMappings.Add(
        new ItemMapping("Value", DataPointMember.YValue));

        seriesMapping.ItemMappings.Add(
        new ItemMapping("Label", DataPointMember.Label));

 

        /*NEW*/

        seriesMapping.ItemsSource = hi.OAS;

 

        radOASHistory.SeriesMappings.Add(seriesMapping);

 

        radOASHistory.DefaultView.ChartArea.AxisX.IsDateTime = true;

        radOASHistory.DefaultView.ChartArea.AxisX.LayoutMode =
            AxisLayoutMode.Inside;

        radOASHistory.DefaultView.ChartArea.AxisX.DefaultLabelFormat =
            "MM/dd/yyyy";

        radOASHistory.DefaultView.ChartArea.AxisX.LabelRotationAngle = 45;

 

        //radOASHistory.DefaultView.ChartArea.DataSeries.Add(lineSeries);

    }

}

All the best,
Petar Kirov
the Telerik team