ChartDirector 6.0 (ASP/COM/VB Edition)

Simple Line Chart




This example demonstrates the basic steps in creating line charts.

Source Code Listing

[Web Version (in ASP)] aspdemo\simpleline.asp
<%@ language="vbscript" %>
<%
Set cd = CreateObject("ChartDirector.API")

' The data for the line chart
data = Array(30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 91, 60, 55, 53, 35, 50, 66, 56, _
    48, 52, 65, 62)

' The labels for the line chart
labels = Array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", _
    "15", "16", "17", "18", "19", "20", "21", "22", "23", "24")

' Create a XYChart object of size 250 x 250 pixels
Set c = cd.XYChart(250, 250)

' Set the plotarea at (30, 20) and of size 200 x 200 pixels
Call c.setPlotArea(30, 20, 200, 200)

' Add a line chart layer using the given data
Call c.addLineLayer(data)

' Set the labels on the x axis.
Call c.xAxis().setLabels(labels)

' Display 1 out of 3 labels on the x-axis.
Call c.xAxis().setLabelStep(3)

' Output the chart
Response.ContentType = "image/png"
Response.BinaryWrite c.makeChart2(cd.PNG)
Response.End
%>

[Windows Version (in Visual Basic)] vbdemo\simpleline.cls
Public Sub createChart(viewer As Object, chartIndex As Integer)

    Dim cd As New ChartDirector.API

    ' The data for the line chart
    Dim data()
    data = Array(30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 91, 60, 55, 53, 35, 50, 66, _
        56, 48, 52, 65, 62)

    ' The labels for the line chart
    Dim labels()
    labels = Array("0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", _
        "15", "16", "17", "18", "19", "20", "21", "22", "23", "24")

    ' Create a XYChart object of size 250 x 250 pixels
    Dim c As XYChart
    Set c = cd.XYChart(250, 250)

    ' Set the plotarea at (30, 20) and of size 200 x 200 pixels
    Call c.setPlotArea(30, 20, 200, 200)

    ' Add a line chart layer using the given data
    Call c.addLineLayer(data)

    ' Set the labels on the x axis.
    Call c.xAxis().setLabels(labels)

    ' Display 1 out of 3 labels on the x-axis.
    Call c.xAxis().setLabelStep(3)

    ' Output the chart
    Set viewer.Picture = c.makePicture()

    'include tool tip for the chart
    viewer.ImageMap = c.getHTMLImageMap("clickable", "", _
        "title='Hour {xLabel}: Traffic {value} GBytes'")

End Sub