📄 gradientline.aspx
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<%@ Page Language="VB" Description="dotnetCHARTING Component" %>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>
<%@ Import Namespace="System.Drawing.Drawing2D" %>
<HTML>
<HEAD>
<TITLE>.netCHARTING Sample</TITLE>
<script runat="server">
Sub Page_Load(sender As [Object], e As EventArgs)
Chart.Type = ChartType.Combo 'Horizontal;
Chart.Size = "600x350"
Chart.TempDirectory = "temp"
Chart.Debug = True
Chart.Title = ".netCHARTING Sample"
' This sample demonstrates using a multi-color 2D line.
' Set some chart properties.
Chart.ChartArea.Label.Text = "Notice the line color change between points of different colors."
Chart.DefaultSeries.Type = SeriesType.Line
Chart.TitleBox.Position = TitleBoxPosition.FullWithLegend
' *DYNAMIC DATA NOTE*
' This sample uses random data to populate the chart. To populate
' a chart with database data see the following resources:
' - Classic samples folder
' - Help File > Data Tutorials
' - Sample: features/DataEngine.aspx
Dim mySC As SeriesCollection = getRandomData()
' Iterate the elements and set the color to red if an elements YValue is outside the 20-40 range.
Dim myE As Element
For Each myE In mySC(0).Elements
If myE.YValue > 40 Or myE.YValue < 20 Then
myE.Color = Color.Red
End If
Next myE ' Add a couple axis markers.
Chart.YAxis.Markers.Add(New AxisMarker("", Color.FromArgb(50, Color.Red), 40, 100))
Chart.YAxis.Markers.Add(New AxisMarker("", Color.FromArgb(50, Color.Red), 0, 20))
Chart.YAxis.Markers(0).LegendEntry.Visible = False
Chart.YAxis.Markers(1).LegendEntry.Visible = False
' 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(1)
Dim a As Integer
For a = 1 To 1
Dim s As New Series()
s.Name = "Sample Data " + a.ToString()
Dim b As Integer
For b = 1 To 14
Dim e As New Element()
e.Name = "Element " + b.ToString()
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>
</HTML>
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