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Gallery > Chart Type Tweaks

Arrow Element Markers

Demonstrates the up and down arrow markers.

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<%@ Page Language="C#" Description="dotnetCHARTING Component" %>

<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Drawing2D" %>
<%@ Import Namespace="dotnetCHARTING.Mapping" %>

<script runat="server">

void Page_Load(Object sender, EventArgs e)
{
// Demonstrates the up and down arrow markers.

Chart.TempDirectory = "temp";
Chart.Debug = true;
Chart.Palette = new Color[] { Color.FromArgb(49, 255, 49) };
Chart.Type = ChartType.Combo;
Chart.Size = "600x350";
Chart.LegendBox.Position = LegendBoxPosition.ChartArea;

Chart.DefaultSeries.Type = SeriesType.Spline;
Chart.DefaultSeries.Line.Width = 2;
Chart.DefaultElement.Marker.Type = ElementMarkerType.ArrowUp;
Chart.DefaultElement.Marker.Size = 15;

// *DYNAMIC DATA NOTE*
// This sample uses random data to populate the chart. To populate
// a chart with database data see the following resources:
// - Use the getLiveData() method using the dataEngine to query a database.
// - Help File > Getting Started > Data Tutorials
// - DataEngine Class in the help file
// - Sample: features/DataEngine.aspx

SeriesCollection mySC = getRandomData();

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

// Manually iterate the series and set the marker type and color.
for (int i = 0; i < mySC[0].Elements.Count; i++)
{
if (i > 0)
{
if (mySC[0][i].YValue > mySC[0][i - 1].YValue)
mySC[0][i].Marker.Type = ElementMarkerType.ArrowUp;
else
{
mySC[0][i].Marker.Type = ElementMarkerType.ArrowDown;
mySC[0][i].Color = Color.Red;
}
}
}

}

SeriesCollection getRandomData()
{
Random myR = new Random(2);
SeriesCollection SC = new SeriesCollection();
int a = 0, b = 2;

for (a = 1; a < 2; a++)
{
Series s = new Series("Series " + a.ToString());
foreach(double val in new double[]{20,30,33,50,55,85,80,50,45,33,40})
{
Element e = new Element();
e.XValue = b++;
e.YValue = val;
s.Elements.Add(e);
}
SC.Add(s);
}
return SC;
}

SeriesCollection getLiveData()
{
DataEngine de = new DataEngine("ConnectionString goes here");
de.ChartObject = Chart; // Necessary to view any errors the dataEngine may throw.
de.SqlStatement = "SELECT XAxisColumn, YAxisColumn FROM ....";
return de.GetSeries();
}

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>.netCHARTING Sample</title>
</head>
<body>
<div align="center">
<dotnet:Chart ID="Chart" runat="server" />
</div>
</body>
</html>

<%@ Page Language="vb" Description="dotnetCHARTING Component" %>

<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING" %>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Drawing2D" %>
<%@ Import Namespace="dotnetCHARTING.Mapping" %>

<script runat="server">

Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
' Demonstrates the up and down arrow markers.

Chart.TempDirectory = "temp"
Chart.Debug = True
Chart.Palette = New Color() { Color.FromArgb(49, 255, 49) }
Chart.Type = ChartType.Combo
Chart.Size = "600x350"
Chart.LegendBox.Position = LegendBoxPosition.ChartArea

Chart.DefaultSeries.Type = SeriesType.Spline
Chart.DefaultSeries.Line.Width = 2
Chart.DefaultElement.Marker.Type = ElementMarkerType.ArrowUp
Chart.DefaultElement.Marker.Size = 15

' *DYNAMIC DATA NOTE*
' This sample uses random data to populate the chart. To populate
' a chart with database data see the following resources:
' - Use the getLiveData() method using the dataEngine to query a database.
' - Help File > Getting Started > Data Tutorials
' - DataEngine Class in the help file
' - Sample: features/DataEngine.aspx

Dim mySC As SeriesCollection = getRandomData()

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

' Manually iterate the series and set the marker type and color.
For i As Integer = 0 To mySC(0).Elements.Count - 1
If i > 0 Then
If mySC(0)(i).YValue > mySC(0)(i - 1).YValue Then
mySC(0)(i).Marker.Type = ElementMarkerType.ArrowUp
Else
mySC(0)(i).Marker.Type = ElementMarkerType.ArrowDown
mySC(0)(i).Color = Color.Red
End If
End If
Next i

End Sub

Function getRandomData() As SeriesCollection
Dim myR As Random = New Random(2)
Dim SC As SeriesCollection = New SeriesCollection()
Dim a As Integer = 0, b As Integer = 2

For a = 1 To 1
Dim s As Series = New Series("Series " & a.ToString())
For Each val As Double In New Double(){20,30,33,50,55,85,80,50,45,33,40}
Dim e As Element = New Element()
e.XValue = b
b += 1
e.YValue = val
s.Elements.Add(e)
Next val
SC.Add(s)
Next a
Return SC
End Function

Function getLiveData() As SeriesCollection
Dim de As DataEngine = New DataEngine("ConnectionString goes here")
de.ChartObject = Chart ' Necessary to view any errors the dataEngine may throw.
de.SqlStatement = "SELECT XAxisColumn, YAxisColumn FROM ...."
Return de.GetSeries()
End Function

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>.netCHARTING Sample</title>
</head>
<body>
<div align="center">
<dotnet:Chart ID="Chart" runat="server" />
</div>
</body>
</html>

Sample FilenameArrowElementMarkers.aspx
Version5.2
Uses DatabaseNo

JS Charting

Gallery

Arrow Element Markers