How to make a stack bar transparent? | Infragistics Forums

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How to make a stack bar transparent?

Holger posted over 16 years ago

Hello, i wanted to use a stack chart to implement a special diagram. To solve the problem, i need to show the first bar of each stack transparent (as a kind of placeholder) . But all i do it is shown in a range from white to black.
MyUltraChart.ColorModel.AlphaLevel = 255
MyUltraChart.ColorModel.Grayscale = False
MyUltraChart.ColorModel.CustomPalette = New Drawing.Color() {Drawing.Color.Transparent, ColorPrimary, ColorSecondary, ColorThird}
MyUltraChart.ColorModel.ModelStyle = Infragistics.UltraChart.Shared.Styles.ColorModels.CustomLinear

Why does it ignore Color.Transparent and White in CustomPalette?
And how can i hide the bar borders?

Thank you very much!
Holger

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Holger posted over 16 years ago

I can disable the gradient effect by . Now i can use transparency. Only question i look for is how i can disable borders for special bars of a stack chart...
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Holger posted over 16 years ago in reply to Holger

I found a way how i can hide columns in a chart:

Protected Sub myChart_ChartDrawItem(ByVal sender As Object, ByVal e As Infragistics.UltraChart.Shared.Events.ChartDrawItemEventArgs) Handles myChart.ChartDrawItem
If e.Primitive.Column = 0 Then
e.Primitive.Visible = False
End If
End Sub

Solved.
Holger
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