StackedBar Legend item not showing.

[Kristjan Einarsson]

Hi, I have a problem when populating stacked bar charts. My code is following:
XMAL:

<telerik:RadChart x:Name="chart" PaletteBrushesRepeat="False" telerik:Theming.Theme="Summer">
 </telerik:RadChart>

C#:

chart.SeriesMappings.Clear();
            chart.DefaultView.ChartArea.DataSeries.Clear();
            chart.DefaultView.ChartLegend.UseAutoGeneratedItems = true;
            chart.DefaultSeriesDefinition.LegendDisplayMode = LegendDisplayMode.SeriesLabel;

            for (int i = 0; i < model.Captions.Count; i++ )
            {
                SeriesMapping sm = new SeriesMapping();
                StackedBarSeriesDefinition dd = new StackedBarSeriesDefinition();

                dd.StackGroupName = "Stack1";
                sm.SeriesDefinition = dd;
                sm.LegendLabel = "Stacked Bar " + i;
                sm.CollectionIndex = i;

                ItemMapping im1 = new ItemMapping();
                im1.DataPointMember = DataPointMember.YValue;
                sm.ItemMappings.Add(im1);
                chart.SeriesMappings.Add(sm);
            }

            List<double[]> itemsSource = new List<double[]>();
            for (int i = 0; i < model.Children.Count; i++)
            {
                double[] d =  model.Children[i].Values.Select(s => s.AdjustedValue).ToArray();
                itemsSource.Add(d);
            }

I'm not sure where I'm going wrong here but I'd thought "sm.LegendLabel = "Stacked Bar " + i; " would provide my with legend items.

Best regards
Kristján.

[Kristjan Einarsson]

anyone ?

[Evgenia]

Hello Kristjan,

To be able to create Stacked Bar chart databound using Manual Series Mappings there are some things you should have in mind:
Each SeriesMapping has ItemMappings property. For each ItemMapping the following properties are set - DataPointMember and FieldName which specifies from where the data should be taken.
The following sample code creates Stacked bar chart where the data for the chart is stored in List of business objects:

public class Company
        {
            public string Name { get; set; }
            public double Value1 { get; set; }

            public double Value2 { get; set; }
            public double Value3 { get; set; }

            public Company(string name, double value1, double value2, double value3)
            {
                Name = name;
                Value1 = value1;
                Value2 = value2;
                Value3 = value3;
            }
        }

        public MainWindow()
        {
            InitializeComponent();

            List<Company> sampleData = new List<Company>();
            sampleData.Add(new Company("Physical", 100, 400, 300));
            sampleData.Add(new Company("Virtualized", 600, 200, 240));

            SeriesMapping seriesMapping = new SeriesMapping { LegendLabel = "Series 1" };
            seriesMapping.ItemMappings.Add(new ItemMapping("Value1", DataPointMember.YValue));
            seriesMapping.ItemMappings.Add(new ItemMapping("Name", DataPointMember.XCategory));
            seriesMapping.SeriesDefinition = new  StackedBarSeriesDefinition() { ShowItemLabels = true};

            SeriesMapping seriesMapping2 = new SeriesMapping { LegendLabel = "Series 2" };
            seriesMapping2.ItemMappings.Add(new ItemMapping("Value2", DataPointMember.YValue));
            seriesMapping2.ItemMappings.Add(new ItemMapping("Name", DataPointMember.XCategory));
            seriesMapping2.SeriesDefinition = new StackedBarSeriesDefinition() {ShowItemLabels = true};

            SeriesMapping seriesMapping3 = new SeriesMapping { LegendLabel = "Series 3" };
            seriesMapping3.ItemMappings.Add(new ItemMapping("Value3", DataPointMember.YValue));
            seriesMapping3.ItemMappings.Add(new ItemMapping("Name", DataPointMember.XCategory));
            seriesMapping3.SeriesDefinition = new StackedBarSeriesDefinition() { ShowItemLabels = true };

            RadChart1.ItemsSource = sampleData;
            RadChart1.DefaultView.ChartArea.AxisY.AutoRange = false;
            RadChart1.DefaultView.ChartArea.AxisY.AddRange(0,1200,100);

            RadChart1.SeriesMappings.Add(seriesMapping);
            RadChart1.SeriesMappings.Add(seriesMapping2);
            RadChart1.SeriesMappings.Add(seriesMapping3);
        }

If you need to add the Legend items manually you can follow our help topic (Manual Legend Items Generation).

Regards,
Evgenia
the Telerik team

[Kristjan Einarsson]

Ok, thanks, I tried your code it did not work until I created an new clean Telerik project.
The problem was that the project was referring to some older Telerik dll's in my project.

Thanks for the help :)