📄 dynamicticks.aspx
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<%@ Page Language="VB" debug="true" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>
<HTML>
<HEAD>
<TITLE>Dynamic Ticks</TITLE>
<script runat="server">
Sub Page_Load(sender As [Object], e As EventArgs)
Chart.Type = ChartType.Combo 'Horizontal;
Chart.Width = Unit.Parse(600)
Chart.Height = Unit.Parse(350)
Chart.TempDirectory = "temp"
Chart.Debug = True
' This sample will demonstrate how to create dynamic tick labels based on chart data.
' 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. Or the dataEngine tutorial in the help file.
Dim sc As SeriesCollection = getRandomData()
' Pass a simple string manipulation funtion to the x axis.
Chart.XAxis = Chart.XAxis.Calculate("XAxis", new ChangeValueDelegate(AddressOf MyFunction))
' Have the tick mark labels be the total value of the each ticks group of elements.
Chart.XAxis.TickLabel.Text = "%Value"
' Each tick label will first become a value, then our function below will change the tick label based
' the ticks value.
' To expand on this we'll use an annotation to show how many tick groups are over and under 100.
' We have initialized an annotation and 2 counters below.
' Zero out the counters.
underCount = 0
overCount = 0
' Add the annotation to our chart.
Chart.Annotations.Add(ann)
' Add the random data.
Chart.SeriesCollection.Add(sc)
End Sub 'Page_Load
Public Shared ann As New Annotation()
Public Shared underCount As Integer = 0
Public Shared overCount As Integer = 0
Public Shared Function MyFunction(value As String) As String
Dim num As Integer = Integer.Parse(value)
Dim newLabel As String = ""
' Modify the string and increment counters.
If num > 100 Then
newLabel = " Over 100 (" + value + ")"
overCount += 1
Else
newLabel = " Under 100 (" + value + ")"
underCount += 1
End If
' Update the annotation with the new count.
ann.Label.Text = overCount.ToString() + " group(s) are over, and " + underCount.ToString() + " are under 100."
ann.Position = New Point(100, 0)
Return newLabel
End Function 'MyFunction
Function getRandomData() As SeriesCollection
Dim SC As New SeriesCollection()
Dim myR As New Random()
Dim a As Integer
For a = 1 To 4
Dim s As New Series()
s.Name = "Series " + a.ToString()
Dim b As Integer
For b = 1 To 4
Dim e As New Element()
e.Name = "Element " + b.ToString()
'e.YValue = -25 + myR.Next(50);
e.YValue = myR.Next(50)
s.Elements.Add(e)
Next b
SC.Add(s)
Next a
' 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
End Function 'getRandomData
</script>
</HEAD>
<BODY>
<DIV align="center">
<dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px">
</dotnet:Chart>
</DIV>
</BODY>
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