ItemToolTipOpening is not firing

[Joe]

Hi,
I create my chart in code behind, I do not use seriesMapping, I add dataseries to my chart like this:
 /// <summary>
        /// Add dataseries to chart
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="chart"></param>
        /// <param name="seriesDef"></param>
        /// <param name="data"></param>
        public static void CreateDataSeries<T>(this RadChart chart, CustomSeriesDefinition<T> seriesDef, IEnumerable<T> data)
        {
            //if already there, do nothing
            if (chart.DefaultView.ChartArea.DataSeries.Any(s => s.LegendLabel == seriesDef.LegendLabel))
                return;

            var dataSeries = ChartGenerator.CreateDefaultDataSeries(seriesDef);
            if (seriesDef.IsVisableInLegend)
                dataSeries.LegendLabel = seriesDef.LegendLabel;
            foreach (var dataElement in data)
            {
                var point = seriesDef.Compute(dataElement);
                dataSeries.Add(point);

            }
            chart.DefaultView.ChartArea.DataSeries.Add(dataSeries);
        }
and the CustomSeriesDefinition is defined here
  public CustomSeriesDefinition(string legendLabel, SeriesDefinition chartType, Func<T, DataPoint> compute, bool isVisableInLegend, bool showItemToolTips = false)
        {
            
            ChartType = chartType;
            ChartType.ShowItemToolTips = showItemToolTips;
           
            Compute = compute;
            IsVisableInLegend = isVisableInLegend;
            LegendLabel = legendLabel;

        }
When I set the ShowItemToolTip = true, I never get the event firing for ItemToolTipOpening. Do I have to use SeriesMapping to use this event?

[Rahul]

Hi Joe,
        
Try registering event for tooltip in following way.

radChart.DefaultView.ChartArea.ItemToolTipOpening+=new ItemToolTipEventHandler(ChartArea_ItemToolTipOpening);

void ChartArea_ItemToolTipOpening(ItemToolTip2D tooltip, ItemToolTipEventArgs e)
{
tooltip.Content = "Disease Name : " + DiseaseName + "\n" +
                              "# of Pts     : " + TotalPatientCount + "\n"
                            + "% of Pts     : " + intPercentage;
 }

Regards,
Rahul