corelibraries-devexpress-dot-xtracharts-7a9f5643.md
Provides data for a chart control’s ChartControl.CustomDrawSeriesPoint (WebChartControl.CustomDrawSeriesPoint) event.
Namespace : DevExpress.XtraCharts
Assembly : DevExpress.XtraCharts.v25.2.dll
NuGet Package : DevExpress.Charts
public class CustomDrawSeriesPointEventArgs :
CustomDrawSeriesEventArgsBase
Public Class CustomDrawSeriesPointEventArgs
Inherits CustomDrawSeriesEventArgsBase
CustomDrawSeriesPointEventArgs is the data class for the following events:
| Library | Related API Members |
|---|---|
| WinForms Controls | ChartControl.CustomDrawSeriesPoint |
| ASP.NET Web Forms Controls | WebChartControl.CustomDrawSeriesPoint |
| .NET Reporting Tools | XRChart.CustomDrawSeriesPoint |
The CustomDrawSeriesPointEventArgs class represents an argument for the ChartControl.CustomDrawSeriesPoint event of a chart control.
An instance of the CustomDrawSeriesPointEventArgs class with appropriate settings is automatically created and passed to the corresponding event’s handler.
Important
Note, that if you change properties of the chart elements that are available only via getters (e.g., CustomDrawSeriesPointEventArgs.SeriesPoint), these changes will not be effected. To make changes that should be effected, use the CustomDrawSeriesEventArgsBase.SeriesDrawOptions property.
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.
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);
}
}
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
Object EventArgs CustomDrawSeriesEventArgsBase CustomDrawSeriesPointEventArgs
See Also