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How do I specify different colors for each data point in a column series?

 

The color of each of the columns (points) in a Column Chart can be changed by handling the PrepareStyle event of the series

.

C#

series.PrepareStyle += new ChartPrepareStyleInfoHandler(this.ChartControlSeries_PrepareStyle);

protected void ChartControlSeries_PrepareStyle(object sender, ChartPrepareStyleInfoEventArgs args)

{

ChartSeries series = sender as ChartSeries;

int r, g, b;

switch(args.Index)

{

case 0:

r = 222;b=245;g=123;

break;

default:

r = 222;b=245;g=123;

break;

}

if(series != null)

{

args.Style.Interior = new BrushInfo(GradientStyle.None,Color.Black,Color.FromArgb(r,g,b ) );

args.Handled = true;

}

}

VB

AddHandler series.PrepareStyle, AddressOf ChartControlSeries_PrepareStyle

Protected Sub ChartControlSeries_PrepareStyle(ByVal sender As Object, ByVal args As ChartPrepareStyleInfoEventArgs)

Dim series As ChartSeries = CType(IIf(TypeOf sender Is ChartSeries, sender, Nothing), ChartSeries)

Dim r, g, b As Integer

Select Case args.Index

Case 0

  r = 222

  b=245

  g=123

Case Else

  r = 222

  b=245

  g=123

 End Select

If Not series Is Nothing Then

args.Style.Interior = New BrushInfo(GradientStyle.None,Color.Black,Color.FromArgb(r,g,b))

args.Handled = True

End If

End Sub

Article ID: Published Date: Last Revised Date: Platform: Control:
20 04/30/2011 07/10/2014 ASP.NET Web Forms (Classic) Chart
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