2d Columnchart color coding | Infragistics Forums

665

2d Columnchart color coding

Fast posted over 15 years ago

Hello, using the 2D Column chart, UltraChart on .NetAdvantage Vol1 2008, CLR 3.5. My question is ...with reference to a single column, when the DataValue is in a certain range, then can the column display one color(say blue) and if it's not then another color(say green)? If this can be done, then can you give me more guidance on the same. Thanks

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Teodor Taushanov posted over 15 years ago in reply to Fast

I'm not really sure what you are trying to achieve, but the Chart can pick the colors automatically and if you want to specify colors you need to do this manually.
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Fast posted over 15 years ago in reply to Teodor Taushanov

Thank you, I appreciate your help. I have another question. The way I'm using the chart is, there is one chart and about 9 buttons, all these buttons are linked to 9 different Stored Procedures. So when the button is clicked, then the appropriate SP is called and the chart is loaded accordingly. Now, I am storing the data value from the SP into a session variable, so that for each and every SP if the data value is > or less than some value then the chart is color coded. Also, every stored procedure returns totally different ranges. Like SP1 returns say from 50-50000, while SP2 returns from 0 -2. Additionally, I don't want to add this color coding to a few SP's. Just a reminder, there is just one chart that goes around all the 9 SP's. So to make the colors work according to this, how do I go about it? Thanks
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Teodor Taushanov posted over 15 years ago in reply to Fast

Imports Infragistics.UltraChart.Data

Imports Infragistics.UltraChart.Core.Primitives

Imports Infragistics.UltraChart.Resources.Appearance
Public Class Form1Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
UltraChart1.DataSource = DemoTable.AllPositive()

UltraChart1.DataBind()

End Sub
Private Sub UltraChart1_ChartDrawItem(ByVal sender As System.Object, ByVal e As Infragistics.UltraChart.Shared.Events.ChartDrawItemEventArgs) Handles UltraChart1.ChartDrawItem
Dim box As Box = TryCast(e.Primitive, Box)

If box Is Nothing Then

Return

End If

If box.DataPoint Is Nothing Then

Return

End If
Dim val As Double = Convert.ToDouble(box.Value)
If val > 10 AndAlso val < 50 Then
box.PE = New PaintElement(Color.Blue)
Else
box.PE = New PaintElement(Color.Red)
End If
End Sub
End Class
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Fast posted over 15 years ago in reply to Teodor Taushanov

Thank you, but could you tell me the same using VB.NEt?
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Teodor Taushanov posted over 15 years ago

You can try using ChartDrawItem Event:

this.ultraChart2.ChartDrawItem += new Infragistics.UltraChart.Shared.Events.ChartDrawItemEventHandler(ultraChart2_ChartDrawItem);

...
private void ultraChart2_ChartDrawItem(object sender, Infragistics.UltraChart.Shared.Events.ChartDrawItemEventArgs e)
{
Box box = e.Primitive as Box;if (box == null)
{
return;
}
if (box.DataPoint == null)
{
return;
}

double val = Convert.ToDouble(box.Value);
if (val > 10 && val < 50)
{
box.PE = new PaintElement(Color.Blue);
}

else

{
box.PE = new PaintElement(Color.Red);
}

}
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