Chart Sum Function in BarSeries

[Michel]

Hello,

I'm implementing a RadCartesianChart with dynamic ChartDataSource and data sampling.
Everything's fine but I'd like to sample via a sum function and not via the default average one.
So I created a new SumBarSeries which inherits from BarSeries as shown below :

public class SumBarSeries : BarSeries
{
    protected override ChartAggregateFunction GetValueAggregateFunction()
    {
        return new ChartSumFunction();
    }
}

There's a min, max, average, keepextremes,  first and last function but no sum function.
Is there a simple way to add such a function?
Furthermore is it possible to change dynamically the sampling function just like the old RadCharts without changing the BarSeries class (ie. SumBarSeries)?

Thanks,

Michel LACOMBE

[Michel]

Hey,

My sum function's working but I'm not sure it's the good way to implement the sum function.

public class ChartSumFunction : ChartAggregateFunction
    {
        protected override string AggregateMethodName
        {
            get
            {
                return "Sum";
            }
        }     
    }

Thanks for your feedback