DataSource Class

Represents a single or related set of .netCHARTING data-based objects that specify a data source used to parse tokens and populate custom legend boxes with LegendEntry objects.

For a list of all members of this type, see DataSource members.

Inheritance Hierarchy

System.Object
dotnetCHARTING.DataSource

Syntax

[Visual Basic]
Public Class DataSource

[C#]
public class DataSource

Example

[C#]

<%@ Page Language="C#" Description="dotnetCHARTING Component" %> 
<%@ Register TagPrefix="dotnet"  Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%> 
<%@ Import Namespace="System.Drawing" %> 
<HTML> 
    <HEAD> 
        <TITLE>.netCHARTING Sample</TITLE> 
        <script runat="server"> 
 
void Page_Load(Object sender,EventArgs e) 
{ 
 
    Chart.Type = ChartType.Combo;//Horizontal; 
    Chart.Width = 600; 
    Chart.Height = 350; 
    Chart.TempDirectory = "temp"; 
    Chart.Debug = true; 
    Chart.DefaultSeries.Type = SeriesType.Line; 
         
    // This sample will demonstrate how to use data sources to process string tokens in an annotation. 
    // It will take the series collection we chart and show some additional information about it in an annotation. 
     
    // 1. GET DATA 
    // *DYNAMIC DATA NOTE*  
    // This sample uses random data to populate the chart. For information on acquiring  
    // database data see the following resources: 
    // - Classic samples folder 
    // - Help File > Data Tutorials 
    // - Sample: features/DataEngine.aspx 
    SeriesCollection mySC = getRandomData(); 
         
    // 2. CREATE AN ANNOTATION AND SET THE DATA SOURCE. 
    Annotation an = new Annotation(); 
     
    // Create the data source. 
    an.DataSource = DataSource.FromSeriesCollection(mySC); 
    // A simpler way to set the data source that also works is to use  
    // the implicit casting functionality of the DataSource object. 
    an.DataSource = mySC; 
     
    // Specify the text with tokens to replace. 
    an.Label.Text = "y sum: <%YSum,Currency> \n x sum : %XSum"; 
     
    // Add the annotation to the chart. 
    Chart.Annotations.Add(an); 
         
    // Add the random data. 
    Chart.SeriesCollection.Add(mySC); 
     
} 
 
SeriesCollection getRandomData() 
{ 
    SeriesCollection SC = new SeriesCollection(); 
    Random myR = new Random(); 
    for(int a = 0; a < 1; a++) 
    { 
        Series s = new Series(); 
        s.Name = "Series " + a; 
        for(int b = 0; b < 20; b++) 
        { 
            Element e = new Element(); 
            //e.Name = "Element " + b; 
            e.YValue = myR.Next(50); 
            e.XValue = myR.Next(50); 
            s.Elements.Add(e); 
        } 
        SC.Add(s); 
    } 
 
    return SC; 
} 
        </script> 
    </HEAD> 
    <BODY> 
        <DIV align="center"> 
            <dotnet:Chart id="Chart" runat="server" Width="568px" Height="344px"> 
            </dotnet:Chart> 
        </DIV> 
    </BODY> 
</HTML>

[Visual Basic]

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

<%@ Register TagPrefix="dotnet"  Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>

<%@ Import Namespace="System.Drawing" %>

<HTML>

    <HEAD>

        <TITLE>.netCHARTING Sample</TITLE>

        <script runat="server">





Sub Page_Load(sender As [Object], e As EventArgs)



   Chart.Type = ChartType.Combo 'Horizontal;

   Chart.Width = Unit.Parse(600)

   Chart.Height = Unit.Parse(350)

   Chart.TempDirectory = "temp"

   Chart.Debug = True

   Chart.DefaultSeries.Type = SeriesType.Line



   ' This sample will demonstrate how to use data sources to process string tokens in an annotation.

   ' It will take the series collection we chart and show some additional information about it in an annotation.

   ' 1. GET DATA

   ' *DYNAMIC DATA NOTE*

   ' This sample uses random data to populate the chart. For information on acquiring

   ' database data see the following resources:

   ' - Classic samples folder

   ' - Help File > Data Tutorials

   ' - Sample: features/DataEngine.aspx

   Dim mySC As SeriesCollection = getRandomData()



   ' 2. CREATE AN ANNOTATION AND SET THE DATA SOURCE.

   Dim an As New Annotation()



   ' Create the data source.

   an.DataSource = DataSource.FromSeriesCollection(mySC)

   ' A simpler way to set the data source that also works is to use

   ' the implicit casting functionality of the DataSource object.

   an.DataSource = mySC



   ' Specify the text with tokens to replace.

   an.Label.Text = "y sum: <%YSum,Currency> " + ControlChars.Lf + " x sum : %XSum"



   ' Add the annotation to the chart.

   Chart.Annotations.Add(an)



   ' 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()

   Dim a As Integer

   For a = 0 To 0

      Dim s As New Series()

      s.Name = "Series " & a

      Dim b As Integer

      For b = 0 To 19

         Dim e As New Element()

         'e.Name = "Element " & b;

         e.YValue = myR.Next(50)

         e.XValue = myR.Next(50)

         s.Elements.Add(e)

      Next b

      SC.Add(s)

   Next a



   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>

See Also

Language

DataSource Class

Inheritance Hierarchy

Syntax

Example

See Also