📄 colorblindpie.aspx
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<%@ Page Language="C#" debug="true" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>
<HTML>
<HEAD>
<TITLE>Color Blind Pie</TITLE>
<script runat="server">
void Page_Load(Object sender,EventArgs e)
{
Chart.Type = ChartType.Pies;//Horizontal;
Chart.Width = 600;
Chart.Height = 350;
Chart.TempDirectory = "temp";
// This sample demonstrates how to apply markers to the data when differences in color
// are difficult to distinguish.
// First we get our data, if you would like to get the data from a database you need to use
// the data engine. See sample: features/dataEngine.aspx. Or the dataEngine tutorial in the help file.
SeriesCollection sc = getRandomData();
// The function below takes care of modifying the series.
ModifySeries(sc);
// Add the random data.
Chart.SeriesCollection.Add(sc);
}
// Markers array
private static ElementMarkerType[] defaultDotTypes = {
ElementMarkerType.Circle,ElementMarkerType.FourPointStar,ElementMarkerType.Diamond,ElementMarkerType.FivePointStar,
ElementMarkerType.Square,ElementMarkerType.SevenPointStar,ElementMarkerType.Triangle,ElementMarkerType.SixPointStar
};
void ModifySeries(SeriesCollection sc)
{
foreach(Series s in sc)
{
// We want the markers to always appear no matter what the chart or series type. This setting will ensure that.
s.DefaultElement.ForceMarker = true;
// We also want the marker to appear in the legend so we need to set the series type of the series legend entry.
s.DefaultElement.LegendEntry.SeriesType = SeriesType.Marker;
// Each element must also use this marker type and if shown in the legend it must be shown as a marker.
for(int i = 0; i < s.Elements.Count; i++)
{
s.Elements[i].Marker.Type = defaultDotTypes[i%defaultDotTypes.Length];
s.Elements[i].LegendEntry.Marker.Type = defaultDotTypes[i%defaultDotTypes.Length];
}
}
}
SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random();
for(int a = 1; a < 2; a++)
{
Series s = new Series();
s.Name = "Series " + a;
for(int b = 1; b < 5; b++)
{
Element e = new Element();
e.Name = "Element " + b;
//e.YValue = -25 + myR.Next(50);
e.YValue = myR.Next(50);
s.Elements.Add(e);
}
SC.Add(s);
}
// Set Different Colors for our Series
SC[0].DefaultElement.Color = Color.FromArgb(49,255,49);
return SC;
}
</script>
</HEAD>
<BODY>
<DIV align="center">
<dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px">
</dotnet:Chart>
</DIV>
</BODY>
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