📄 annotationdatasource.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;
Chart.DefaultSeries.Type = SeriesType.Line;
// This sample will demonstrate how to use data sources to process string tokens in an annotation.
// It will take the series collection we chart and show some additional information about it in an annotation.
// 1. GET DATA
// *DYNAMIC DATA NOTE*
// This sample uses random data to populate the chart. For information on acquiring
// database data see the following resources:
// - Classic samples folder
// - Help File > Data Tutorials
// - Sample: features/DataEngine.aspx
SeriesCollection mySC = getRandomData();
// 2. CREATE AN ANNOTATION AND SET THE DATA SOURCE.
Annotation an = new Annotation();
// Create the data source.
an.DataSource = DataSource.FromSeriesCollection(mySC);
// A simpler way to set the data source that also works is to use
// the implicit casting functionality of the DataSource object.
an.DataSource = mySC;
// Specify the text with tokens to replace.
an.Label.Text = "y sum: <%YSum,Currency> \n x sum : %XSum";
// Add the annotation to the chart.
Chart.Annotations.Add(an);
// Add the random data.
Chart.SeriesCollection.Add(mySC);
}
SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random();
for(int a = 0; a < 1; a++)
{
Series s = new Series();
s.Name = "Series " + a;
for(int b = 0; b < 20; b++)
{
Element e = new Element();
//e.Name = "Element " + b;
e.YValue = myR.Next(50);
e.XValue = myR.Next(50);
s.Elements.Add(e);
}
SC.Add(s);
}
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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