📄 funnelarea.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.DefaultElement.ShowValue = true;
Chart.DefaultSeries.DefaultElement.SmartLabel.Alignment = LabelAlignment.Center;
Chart.DefaultSeries.DefaultElement.SmartLabel.Text = "%YValue - %Name";
Chart.LegendBox.Orientation = dotnetCHARTING.Orientation.Bottom;
// This sample will demonstrate how to create a funnel chart.
// Setup the title.
Chart.Title = "Funnel Chart";
Chart.TitleBox.Position = TitleBoxPosition.Full;
Chart.TitleBox.Label.Alignment = StringAlignment.Center;
// *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
Series mySeries = getRandomData()[0];
// First we sort the series
mySeries.Sort(ElementValue.YValue,"DESC");
// Make it an area line and get rid of the element markers.
mySeries.Type = SeriesType.AreaLine;
mySeries.DefaultElement.Marker.Type = ElementMarkerType.None;
// Create funnel data
createFunnel(mySeries);
// Five each element a new palette.
mySeries.PaletteName = Palette.Lavender;
// Clear the background.
Chart.YAxis.Clear();
Chart.ChartArea.ClearColors();
Chart.ChartArea.Background.Color = Color.FromArgb(220,220,220);
Chart.YAxis.ZeroTick = null;
Chart.XAxis.Clear();
// Turn off all shadows.
Chart.DefaultShadow.Color = Color.Empty;
// Add the random data.
Chart.SeriesCollection.Add(mySeries);
}
void createFunnel(Series s)
{
// This loop will set the same but negated y value start of the area line as it's value;
foreach(Element myElement in s.Elements)
{
// Because this will double the values we divide it by two first.
myElement.YValue /= 2;
myElement.YValueStart = -myElement.YValue;
}
}
SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random(1);
for(int a = 0; a < 4; a++)
{
Series s = new Series();
s.Name = "Series " + a;
for(int b = 0; b < 4; 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);
}
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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