📄 headerannotation.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>Header Annotation</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 use annotations to create a custom company header on your charts.
' 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()
' Our company logo is 40 pixels high so we'll start by making some space at the top of the chart.
Chart.MarginTop = 40
' Next we place the logo on the chart using an annotation.
Dim a As New Annotation(New Background("dncLogo.jpg"))
a.Position = New Point(27, 0)
Chart.Annotations.Add(a)
' Now we'll make an annotation for the text part.
Dim a2 As New Annotation("Copyright 2004 .netCHARTING. Click for details.")
' We'll add a link so then this text is clicked it takes us to the site.
a2.URL = "http://www.dotnetcharting.com"
' The logo size is 103x40. We'll place the text on the right side and center the text vertically with the logo
' my moving it down 15 pixels.
a2.Position = New Point(130, 15)
' Make sure the annotation doesn't create a rectangle for the text and wrap it.
a2.DynamicSize = False
' In order for the annotation not to draw the background, outline and so on... We'll use a shortcut to clear the colors.
a2.ClearColors()
' Add the second annotation.
Chart.Annotations.Add(a2)
' Add some 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 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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