📄 operatorcalculations.aspx
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<%@ Import Namespace="System.Drawing" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Page Language="VB" debug="true" Description="dotnetCHARTING Component" %>
<script runat="server">
Function getRandomData() As SeriesCollection
Dim SC As New SeriesCollection()
Dim myR As New Random()
Dim a As Integer
For a = 0 To 0
Dim s As New Series()
s.Name = "GNP"
Dim b As Integer
For b = 1 To 4
Dim e As New Element()
e.Name = "Country " + b.ToString()
' Load a very large value.
e.YValue = myR.Next(50000000) + myR.Next(50000000) + myR.Next(50000000) + myR.Next(50000000)
e.YValue += myR.Next(50000000) + myR.Next(50000000) + myR.Next(50000000) + myR.Next(50000000)
e.YValue += myR.Next(500000000) + myR.Next(50000000) + myR.Next(50000000) + myR.Next(500000000)
e.YValue += myR.Next(500000000) + myR.Next(50000000) + myR.Next(50000000) + myR.Next(500000000)
s.Elements.Add(e)
Next b
SC.Add(s)
Next a
Return SC
End Function 'getRandomData
Sub Page_Load(sender As [Object], e As EventArgs)
Chart.Type = ChartType.Combo 'Horizontal;
Chart.TempDirectory = "temp"
Chart.YAxis.NumberPrecision = 2
Chart.Debug = True
' This sample demonstrates how operators can be used on series to manipulate chart data.
' Scenario:
' We are charting dollar amounts some nation's GNP. These values are very large so we will scale
' the data down and show it in billions.
' 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.
Dim sc As SeriesCollection = getRandomData()
' We can scale the data by multiplying the series.
Dim i As Integer
For i = 0 To sc.Count - 1
sc(i) = Series.Multiply(sc(i), 0.000000001)
Next i
' Now we label the axis apropriately.
Chart.YAxis.Label.Text = "(GNP in Billions)"
' Add the random data.
Chart.SeriesCollection.Add(sc)
End Sub 'Page_Load
</script>
<HTML>
<HEAD>
<TITLE>Operator Calculations</TITLE>
</HEAD>
<BODY>
<DIV align="center">
<dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px" />
</DIV>
</BODY>
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