Tornado API Library - V12.30.08

z.dbAreaChart Property

Define Area chart for GridChart or standalone mode.

Product Version


Property Value

Mydb.dbAreaChart = "Legend| Label| Name| Y|...Name39| Y39"

LegendTrue|false(Def) - Display Legends.
LabelFieldNameOrNumber providing the X-axis labels.
NameName of Line used by Legends.
YFieldNameOrNumber providing the Y-axis dataset (0-39) values.

QuickProp Keyword Abbreviation



Check HTML dump for defaults.

Overide the values with dbChartParams.


This example creates a csv file with one label and 2 datasets, save to scratch directory and then open it as csv datasource with 3 columns - F1, F2 and F3. F1 is the label-axis and F2, F3 are the two datasets. The dbAreaChart will plot the two areas with default settings. A third line is created manually in dbChartParams with it's own settings.

<script language="VB" runat="server">
Sub Page_Load(Src As Object, E As EventArgs)
  Dim CSV As String = "F1,F2,F3" & vbCrLf & "L1,22,176" & vbCrLf & "L2,23,67" _
    & vbCrLf & "L3,49,50" & vbCrLf & "L4,150,95" & vbCrLf & "L5,231,48" & vbCrLf _
    & "L6,280,102" & vbCrLf & "L7,654,200" & vbCrLf & "L8,534,100" & vbCrLf & "L9,678,123" _
    & vbCrLf & "L10,654,32" & vbCrLf & "L11,978,45" & vbCrLf & "L12,654,100"
  Dim util As New Tornado.Util
  util.WriteFile("c:\inetpub\wwwroot\tornado\scratch\TestArea.Csv", CSV)
  Dim Area As New Tornado.z
  With Area
      .dbQP = "U=5| S=14| PS=-1| Ni=none| M=Gc| Q=Select * From TestArea.Csv| Dt=TEXT| Pv=OLEDB"
      .dbDSN = "/tornado/scratch"
      Dim Cp As String = "dataset2yValues=321,543,890,123,890,576,400,300,200,250,400,500" & _
        "|dataset2name=Area Two| TitleString=3 Areas"
      .dbChartParams = Cp
      .dbAreaChart = "Label=0| Name0=Area Zero| Y0=1| Name1=Area One| Y1=2"
      .dbTextHolder = "Title=Area Chart"
  End With
End Sub

See Also

z Class | Tornado Namespace | dbPieChart | dbBarChart | dbColumnChart | dbLineChart | dbDateLineChart | dbBubbleChart | Special Topic - Charting