CustomDrawSeriesPointEventArgs.SeriesPoint Property

Gets the series point currently being painted.

Namespace: DevExpress.XtraCharts

Assembly: DevExpress.XtraCharts.v23.2.dll

NuGet Package: DevExpress.Charts

Declaration

C#

public SeriesPoint SeriesPoint { get; }

VB.NET

Public ReadOnly Property SeriesPoint As SeriesPoint

Property Value

Type	Description
SeriesPoint	A SeriesPoint object which represents the series point currently being painted.

Remarks

Use the SeriesPoint property to access the series point currently being painted when handling the ChartControl.CustomDrawSeriesPoint event.

Important

Changes applied to the object accessed via this property will never be effected.

To change a series point’s appearance in a specific case, use the CustomDrawSeriesEventArgsBase.SeriesDrawOptions property instead. If you configure the appearance of an automatically generated series point, use the ChartControl.BoundDataChanged(WebChartControl.BoundDataChanged or ChartControlSettings.BoundDataChanged) event instead.

Example

This example demonstrates how to implement custom drawing in charts when drawing the series points of charts. To do this you should handle the ChartControl.CustomDrawSeriesPoint event, and then you can change some of the drawing parameters using its event args.

C#

using DevExpress.XtraCharts;
// ...

private void chartControl1_CustomDrawSeriesPoint(object sender, 
CustomDrawSeriesPointEventArgs e) {
   // These changes will be applied to Bar Series only.
   BarDrawOptions drawOptions = e.SeriesDrawOptions as BarDrawOptions;
   if (drawOptions == null)
      return;

   // Get the fill options for the series point.
   drawOptions.FillStyle.FillMode = FillMode.Gradient;
   RectangleGradientFillOptions options = 
   drawOptions.FillStyle.Options as RectangleGradientFillOptions;
   if (options == null)
      return;

   // Get the value at the current series point.
   double val = e.SeriesPoint[0];

   // If the value is less than 2.5, then fill the bar with green colors.
   if (val < 2.5) {
      options.Color2 = Color.FromArgb(154, 196, 84);
      drawOptions.Color = Color.FromArgb(81, 137, 3);
      drawOptions.Border.Color = Color.FromArgb(100, 39, 91, 1);
   } 
   // ... if the value is less than 5.5, then fill the bar with yellow colors.
   else if (val < 5.5) {
      options.Color2 = Color.FromArgb(254, 233, 124);
      drawOptions.Color = Color.FromArgb(249, 170, 15);
      drawOptions.Border.Color = Color.FromArgb(60, 165, 73, 5);
   }
   // ... if the value is greater, then fill the bar with red colors.
   else {
      options.Color2 = Color.FromArgb(242, 143, 112);
      drawOptions.Color = Color.FromArgb(199, 57 ,12);
      drawOptions.Border.Color = Color.FromArgb(100, 155, 26, 0);
   }
}

VB.NET

Imports DevExpress.XtraCharts
' ...

Private Sub OnCustomDrawSeriesPoint(ByVal sender As Object, _ 
ByVal e As CustomDrawSeriesPointEventArgs) _
Handles chartControl1.CustomDrawSeriesPoint

   ' These changes will be applied to Bar Series only.
   Dim drawOptions = CType(e.SeriesDrawOptions, BarDrawOptions)
   If drawOptions Is Nothing Then
      Return
   End If

   ' Get the fill options for the series point.
   drawOptions.FillStyle.FillMode = FillMode.Gradient
   Dim options = CType(drawOptions.FillStyle.Options, RectangleGradientFillOptions)
   If options Is Nothing Then
      Return
   End If

   ' Get the value at the current series point.
   Dim val As Double = e.SeriesPoint(0)

   ' If the value is less than 2.5, then fill the bar with green colors.
   If val < 2.5 Then
      options.Color2 = Color.FromArgb(154, 196, 84)
      drawOptions.Color = Color.FromArgb(81, 137, 3)
      drawOptions.Border.Color = Color.FromArgb(100, 39, 91, 1)
      ' ... if the value is less than 5.5, then fill the bar with yellow colors.
   Else
      If val < 5.5 Then
         options.Color2 = Color.FromArgb(254, 233, 124)
         drawOptions.Color = Color.FromArgb(249, 170, 15)
         drawOptions.Border.Color = Color.FromArgb(60, 165, 73, 5)
         ' ... if the value is greater, then fill the bar with red colors.
      Else
         options.Color2 = Color.FromArgb(242, 143, 112)
         drawOptions.Color = Color.FromArgb(199, 57, 12)
         drawOptions.Border.Color = Color.FromArgb(100, 155, 26, 0)
      End If
   End If
End Sub