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Element Annotation

Demonstrates how to attach an annotation to an element on the chart.

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<%@ Import Namespace="System.Drawing" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Page Language="C#" Description="dotnetCHARTING Component" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Element Annotation</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";

// Demonstrates how to attach an annotation to an element on the chart.
// This can be any element in any chart type.

// 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.
SeriesCollection sc = getRandomData();

// Instantiate the annotation with the initial text. Because this annotation will be associated with an element
// we can use all the element tokens in the text, toolTip and even url of this annotation.
Annotation a = new Annotation("Element: %Name \n Series: %SeriesName \n Value: %YValue");

// Set the background color.
a.Background.Color = Color.FromArgb(200,180,180,220);

// Bevel the background.
a.Background.Bevel = true;

// Orient the annotation be on the top left side of our element.
a.Orientation = dotnetCHARTING.Orientation.TopLeft;

// Make all the corners round.
a.DefaultCorner = BoxCorner.Round;

// Dont dynamically size the annotation.
a.DynamicSize = false;

// Assign the annotation to an element in the sc collection.
sc[0].Elements[2].Annotation = a;

// Add the random data.
Chart.SeriesCollection.Add(sc);

}

SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random();
for(int a = 1; a < 5; a++)
{
Series s = new Series();
s.Name = "Series " + a;
for(int b = 1; b < 5; 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 style="text-align:center">
<dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px" Depth="13px" Use3D="True">

</dotnet:Chart>
</div>
</body>
</html>

<%@ Import Namespace="System.Drawing" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Page Language="vb" Description="dotnetCHARTING Component" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Element Annotation</title>
<script runat="server">

Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)

Chart.Type = ChartType.Combo 'Horizontal;
Chart.Width = 600
Chart.Height = 350
Chart.TempDirectory = "temp"

' Demonstrates how to attach an annotation to an element on the chart.
' This can be any element in any chart type.

' 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()

' Instantiate the annotation with the initial text. Because this annotation will be associated with an element
' we can use all the element tokens in the text, toolTip and even url of this annotation.
Dim a As Annotation = New Annotation("Element: %Name " & Constants.vbLf & " Series: %SeriesName " & Constants.vbLf & " Value: %YValue")

' Set the background color.
a.Background.Color = Color.FromArgb(200,180,180,220)

' Bevel the background.
a.Background.Bevel = True

' Orient the annotation be on the top left side of our element.
a.Orientation = dotnetCHARTING.Orientation.TopLeft

' Make all the corners round.
a.DefaultCorner = BoxCorner.Round

' Dont dynamically size the annotation.
a.DynamicSize = False

' Assign the annotation to an element in the sc collection.
sc(0).Elements(2).Annotation = a

' Add the random data.
Chart.SeriesCollection.Add(sc)

End Sub

Function getRandomData() As SeriesCollection
Dim SC As SeriesCollection = New SeriesCollection()
Dim myR As Random = New Random()
For a As Integer = 1 To 4
Dim s As Series = New Series()
s.Name = "Series " & a
For b As Integer = 1 To 4
Dim e As Element = New Element()
e.Name = "Element " & b
'e.YValue = -25 + myR.Next(50);
e.YValue = myR.Next(50)
s.Elements.Add(e)
Next b
SC.Add(s)
Next a

Return SC
End Function

</script>
</head>
<body>
<div style="text-align:center">
<dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px" Depth="13px" Use3D="True">

</dotnet:Chart>
</div>
</body>
</html>

Sample FilenameElementAnnotation.aspx
VersionLegacy (Pre 3.0)
Uses DatabaseNo

JS Charting

Gallery

Element Annotation