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Gauge Custom Needle

Demonstrates using a custom image with a dynamic color for gauge needles.

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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 using a custom image with a dynamic color for gauge needles.

Chart.TempDirectory = "temp";
Chart.Debug = true;

Chart.Type = ChartType.Combo;
Chart.Size = "600x350";
//Chart.Title = ".netCHARTING Sample";
Chart.Type = ChartType.Gauges;

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

SeriesCollection mySC = getRandomData();
Chart.DefaultSeries.Background.Color = Color.White;

// Add the random data.
Chart.SeriesCollection.Add(mySC);
// mySC[0].YAxis = new Axis();
Chart.YAxis.MinorTicksPerInterval = 3;
Chart.YAxis.DefaultMinorTick.Line.Width = 1;
Chart.YAxis.DefaultMinorTick.Line.Length = 5;
Chart.YAxis.GaugeNeedleType = GaugeNeedleType.UseMarker;
mySC[0].DefaultElement.Marker = new ElementMarker("../../images/needle2.png");
mySC[0].DefaultElement.Marker.DynamicImageColor = Color.FromArgb(255, 255, 255);

mySC[1].DefaultElement.Marker = new ElementMarker("../../images/g2.gif");
mySC[1].DefaultElement.Marker.DynamicImageColor = Color.FromArgb(119,119,119);

Chart.ChartArea.ClearColors();
//mySC[0].LegendEntry.SeriesType = SeriesType.Marker;
//mySC[0].LegendEntry.Marker = new ElementMarker("CustomNeedle.gif");

}

SeriesCollection getRandomData()
{
Random myR = new Random();
SeriesCollection SC = new SeriesCollection();
for(int a = 1; a < 3; a++)
{
Series s = new Series("Series " + a.ToString());
for(int b = 1; b < 2; b++)
{
Element e = new Element("Element " + b.ToString());
e.YValue = myR.Next(50);
s.Elements.Add(e);
}
SC.Add(s);
}
return SC;
}

</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 using a custom image with a dynamic color for gauge needles.

Chart.TempDirectory = "temp"
Chart.Debug = True

Chart.Type = ChartType.Combo
Chart.Size = "600x350"
'Chart.Title = ".netCHARTING Sample";
Chart.Type = ChartType.Gauges

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

Dim mySC As SeriesCollection = getRandomData()
Chart.DefaultSeries.Background.Color = Color.White

' Add the random data.
Chart.SeriesCollection.Add(mySC)
' mySC[0].YAxis = new Axis();
Chart.YAxis.MinorTicksPerInterval = 3
Chart.YAxis.DefaultMinorTick.Line.Width = 1
Chart.YAxis.DefaultMinorTick.Line.Length = 5
Chart.YAxis.GaugeNeedleType = GaugeNeedleType.UseMarker
mySC(0).DefaultElement.Marker = New ElementMarker("../../images/needle2.png")
mySC(0).DefaultElement.Marker.DynamicImageColor = Color.FromArgb(255, 255, 255)

mySC(1).DefaultElement.Marker = New ElementMarker("../../images/g2.gif")
mySC(1).DefaultElement.Marker.DynamicImageColor = Color.FromArgb(119,119,119)

Chart.ChartArea.ClearColors()
'mySC[0].LegendEntry.SeriesType = SeriesType.Marker;
'mySC[0].LegendEntry.Marker = new ElementMarker("CustomNeedle.gif");

End Sub

Function getRandomData() As SeriesCollection
Dim myR As Random = New Random()
Dim SC As SeriesCollection = New SeriesCollection()
For a As Integer = 1 To 2
Dim s As Series = New Series("Series " & a.ToString())
For b As Integer = 1 To 1
Dim e As Element = New Element("Element " & b.ToString())
e.YValue = myR.Next(50)
s.Elements.Add(e)
Next b
SC.Add(s)
Next a
Return SC
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 FilenameGaugeCustomNeedle.aspx
Version4.3
Uses DatabaseNo

JS Charting

Gallery

Gauge Custom Needle