Hi,
I need to display customized tooltips on individual sectors of a pie chart. How can I do it in the code behind? Because I also need to customize the background color of the pie chart, I have to dynamically generate pie series in the code behind.
My code snippet is attached.

Thanks,

Rong

    Private Sub LoadAppropriationForAllPrograms()
        lblChrtHeader.Text = "Appropriation by Program"
        Dim budgetFund As New BudgetBookBAL.BudgetBook
        Dim fundDT As New DataTable
        Dim seriesColor As New BudgetBookBAL.StaticColors
        chrtProgram.PlotArea.Series.Clear()
       

        fundDT = budgetFund.GetAppropriationForAllPrograms()

        Dim chartData As New Telerik.Web.UI.PieSeries
        chartData.StartAngle = "90"
        chartData.LabelsAppearance.Position = Telerik.Web.UI.HtmlChart.PieLabelsPosition.Circle
        chartData.LabelsAppearance.DataFormatString = "${0}M"

       
        Dim total As Decimal = 0D
        For Each row As DataRow In fundDT.Rows
            total = CDec(row("TOT_BUDGET")) + total
        Next

        Dim index As Integer = 0
        For Each row As DataRow In fundDT.Rows
            Dim chartSeries As New Telerik.Web.UI.SeriesItem

            Dim pct As Decimal = 0D
            If total > 0 Then
                pct = CDec(row("TOT_BUDGET")) / total * 100
            End If

            chartSeries.BackgroundColor = seriesColor.GetColor(index)
            Dim desc As String = row("PROG_NAME").ToString + " - $" + CDec(row("TOT_BUDGET")).ToString() + "M (" + pct.ToString("F1") + "%)"

            chartSeries.YValue = CDec(row("TOT_BUDGET"))
            chartSeries.Name = desc
            'chartSeries.TooltipValue = desc
            chartData.Items.Add(chartSeries)
            index += 1
        Next
        chrtProgram.Legend.Appearance.Position = Telerik.Web.UI.HtmlChart.ChartLegendPosition.Right
 
        chrtProgram.PlotArea.Series.Add(chartData)
        chrtProgram.DataBind()
    End Sub