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Sum a series label

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ChartView
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Mindy
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Mindy asked on 21 Aug 2012, 06:31 PM
I have the below code.  I am trying to format the series label so that it sums all the values of that series.   I know that the below code snippet labelDefinition.Format = "#Sum"; doesn't work.  Can you recommend something?
BarSeries ser = new BarSeries();
ser.ValueBinding = new PropertyNameDataPointBinding("IRBDuration");
ser.CategoryBinding = new PropertyNameDataPointBinding("EndYear");
ser.CombineMode = Telerik.Charting.ChartSeriesCombineMode.Stack;
ser.ShowLabels = true;
  
ChartSeriesLabelDefinition labelDefinition = new ChartSeriesLabelDefinition();
labelDefinition.Binding = new PropertyNameDataPointBinding("IRBDuration");
labelDefinition.VerticalAlignment = System.Windows.VerticalAlignment.Center;
labelDefinition.HorizontalAlignment = System.Windows.HorizontalAlignment.Center;
labelDefinition.Format = "#SUM";
ser.LabelDefinitions.Add(labelDefinition);
chart.Series.Add(ser);
ser.ItemsSource = _context.Protocols;

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Petar Marchev
Telerik team
answered on 24 Aug 2012, 10:08 AM
Hello Mindy,

Unfortunately this is not possible out-of-the-box with the ChartView. However using some code behind I think you can get the results you need. Attach a handler to the DataBindingComplete event of the series and apply your logic on changing the labels, in your scenario - hide all labels for a single category, except the last one. The last label should display the sum of the values of all data points for this category. I have attached a simple app to demonstrate this and a snapshot of the output that I get when I run the pp.  

All the best,
Petar Marchev
the Telerik team

Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

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Mindy
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answered on 24 Aug 2012, 01:33 PM
Thanks, I will take a look.  Also, would recommend using the RadChart or the Chartview at this point?
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Petar Marchev
Telerik team
answered on 27 Aug 2012, 07:49 AM
Hi Mindy,

At this point I would recommend the RadChartView as it is the new charting control.

Greetings,
Petar Marchev
the Telerik team

Explore the entire Telerik portfolio by downloading Telerik DevCraft Ultimate.

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Petar Marchev
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Mindy
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