📄 seriestrimming.aspx
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<%@ Page Language="VB" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>
<HTML>
<HEAD>
<TITLE>.netCHARTING Sample</TITLE>
<script runat="server">
Sub Page_Load(sender As [Object], e As EventArgs)
Chart.Type = ChartType.ComboSideBySide 'Horizontal;
Chart.Width = Unit.Parse(600)
Chart.Height = Unit.Parse(350)
Chart.TempDirectory = "temp"
Chart.Debug = True
Chart.Title = "Series.Trim() Method"
Dim a As New Annotation()
a.Position = New Point(300, 70)
a.ClearColors()
a.Label.Text = "Series 2 is trimmed to only leave elements with y values between 15 and 30"
Chart.Annotations.Add(a)
' This sample will demonstrate how to trim elements from a series.
' 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 mySC As SeriesCollection = getRandomData()
' mySC is a series collection that contains two series
' The first series will be shown in it's entirety.
' The second is trimmed to only leave elements with y values between 20 and 30
mySC(1).Trim(15, 30, ElementValue.YValue)
' Add a marker to the y axis to show the range of vales not trimmed from the second series.
Dim M As New AxisMarker()
M.LegendEntry.Name = "Active zone"
M.Background = New Background(Color.FromArgb(100, Color.Red))
M.ValueHigh = 30
M.ValueLow = 15
Chart.YAxis.Markers.Add(M)
' Add the random data.
Chart.SeriesCollection.Add(mySC)
End Sub 'Page_Load
Function getRandomData() As SeriesCollection
Dim SC As New SeriesCollection()
Dim myR As New Random()
Dim a As Integer
For a = 1 To 2
Dim s As New Series()
s.Name = "Series " + a.ToString()
Dim b As Integer
For b = 1 To 50
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)
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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