📄 differenceseries.aspx
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<%@ Page Language="C#" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>
<HTML>
<HEAD>
<TITLE>.netCHARTING Sample</TITLE>
<script runat="server">
void Page_Load(Object sender,EventArgs e)
{
Chart.Type = ChartType.Combo;//Horizontal;
Chart.Width = 600;
Chart.Height = 350;
Chart.TempDirectory = "temp";
Chart.Debug = true;
// This sample will demonstrate how a calculated series can be created and placed in a chart area.
// *DYNAMIC DATA NOTE*
// This sample uses random data to populate the chart. To populate
// a chart with database data see the following resources:
// - Classic samples folder
// - Help File > Data Tutorials
// - Sample: features/DataEngine.aspx
SeriesCollection mySC = getRandomData();
ChartArea ca1 = new ChartArea();
ChartArea ca2 = new ChartArea();
ca2.Label.Text = "Difference";
// Create the difference series.
Series diffSeries = mySC[1] - mySC[0];
diffSeries.DefaultElement.Color = Color.Red;
diffSeries.Name = "Difference";
// Iterate the elements and change their colors based on value.
foreach(Element el in diffSeries.Elements)
if(el.YValue > 0)
el.Color = Color.Green;
else
el.Color = Color.Red;
// Add the series and chart areas to the chart.
Chart.SeriesCollection.Add(mySC[0]);
ca1.SeriesCollection.Add(mySC[1]);
ca2.SeriesCollection.Add(diffSeries);
Chart.ExtraChartAreas.Add(ca1, ca2);
}
SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random(1);
for(int a = 0; a < 2; a++)
{
Series s = new Series();
s.Name = "Series " + (a+1);
for(int b = 0; b < 15; b++)
{
Element e = new Element();
e.Name = "Element " + (b+1);
//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);
SC[1].DefaultElement.Color = Color.FromArgb(255,255,0);
return SC;
}
</script>
</HEAD>
<BODY>
<DIV align="center">
<dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px">
</dotnet:Chart>
</DIV>
</BODY>
</HTML>
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