ASP.NET Chart Control的默认3D图表透明度？

Question

like two guys before me there and second one there I have difficulty with 3D chart.

How to force them to be transparent like this picture:

taken from 3D Area chart example shipped with ASP.NET Chart controls . This chart has ChartColorPalette.BrightPastel pallete, but is transparent.

I have also 3D chart with ChartColorPalette.BrightPastel palette, but is not transparent and I still cannot found way how to make it transparent like example chart. (After examining example markup and codebehind):

The only way I've found is to set the color of series with alpha channel for transparency, or use color palette with transparent colors (for example ChartColorPalette.SemiTransparent ) but there must be some other default way which I'm missing.

Reason I really need this to know is that I'm creating graphs without any code behind just using markup, so I'm finding it a little bit redundant to create code snippets only because of this.

Thank you very much for any answers.

Edit: I'm using .NET 3.5 version of ASP.NET charts.

Answer 1

I see you're on this thread too. Unfortunately, you do need to use colors with an alpha channel in order to set transparency AFAIK

Here's a good overview of the palettes available and some basics on manipulating them

My guess is that you could create a new palette by iterating over the colors in the bright pastel palette and adding an alpha channel - if you do this in a global static, perhaps as part of your webapp init logic, you should be able to reference it pretty easily - if you don't want to have any codebehind, you ?may? be able to databind your custom palette to the CustomPalette property, but I can't say with certainty.

Answer 2

I'd same problem here. Solved using this:

// After all series manipulation, add this
chart.ApplyPaletteColors();
foreach (var serie in chart.Series)
    serie.Color = Color.FromArgb(220, serie.Color);

Answer 3

If you do use palette, and not one color per series, you have to set color for every point:

myChart.ApplyPaletteColors();

foreach (var series in myChart.Series)
{
    foreach (var point in series.Points)
    {
        point.Color = Color.FromArgb(220, point.Color);
    }
}