📄 invisibleelements.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.Title = "Invisible element to hold an annotation.";
// This sample will demonstrate how an invisible element can be used to draw an
// annotation on the chart area at an exact axis value position.
// *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();
// Set up the element.
Element e1 = new Element("",50);
e1.XValue = 5;
e1.Annotation = new Annotation("Annotation On Invisible Point (%XValue,%YValue)");
// Create a series for it and set properties to make it invisible.
Series ser = new Series("",e1);
ser.Type = SeriesType.Marker;
ser.LegendEntry.Visible = false;
ser.DefaultElement.Color = Color.Empty;
// Add the series
Chart.SeriesCollection.Add(ser);
// Add the random data.
Chart.SeriesCollection.Add(mySC);
}
SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random(2);
for(int a = 0; a < 4; a++)
{
Series s = new Series();
s.Name = "Series " + (a+1);
for(int b = 0; b < 4; b++)
{
Element e = new Element();
//e.Name = "Element " + b;
e.XValue = (b+1)*4 ;
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);
SC[2].DefaultElement.Color = Color.FromArgb(255,99,49);
SC[3].DefaultElement.Color = Color.FromArgb(0,156,255);
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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