Data Model

.netCHARTING Data Classes

The .netCHARTING data model consists of elements which collectively become a series which can be added to a SeriesCollection.

Show See Illustration

Data Class	Description
Element	Represents an element on the chart and facilitates the following. Provides properties to hold different types of data such as y value, x value, % completed for Gantt charts and many more. Below Element.YValue is demonstrated. Controls all other variables concerning a single element such as it's label color, marker type etc.
Series	Utilizes the ElementCollection class to hold a set of elements and facilitates the following. Provides a mechanism for setting default properties of all elements within it. Controls all series specific properties such as it's LegendEntry or 2D line dash style (if applicable). Derives an element based on a Calculation which is performed on the elements within it. Provides data manipulation methods such as sorting and trimming of it's elements.
SeriesCollection	Contains a collection of series and facilitates the following. Derives series based on a Calculation which is performed on all the series within it. Provides data manipulation methods such as Transpose.
ElementCollection	Used by the Series class to hold a collection of elements.

Using Data Classes

The following example creates a SeriesCollection containing one Series which contains a single Element using the following steps.

Instantiates an element and sets it's properties.
Instantiates a series and adds the element to it.
Instantiates a SeriesCollection and adds the series to it.

[C#]
Element e = new Element();    // Instantiate the element 
e.Name = "Element 1";      // Name it
e.YValue = 10;             // Set the y value
Series s = new Series();     // Instantiate the series
s.Name = "Series 1";       // Name it
s.Elements.Add(e);         // Add element e to series s.
SeriesCollection sc = new SeriesCollection(); // Instantiate a series collection
sc.Add(s);                 // Add series s to the series collection sc. 

//The sc object now contains data we can chart which we add here.

Chart.SeriesCollection.Add(sc);

[Visual Basic]
Dim e As New Element()    ' Instantiate the element 
e.Name = "Element 1"      ' Name it
e.YValue = 10             ' Set the y value
Dim s As New Series()     ' Instantiate the series
s.Name = "Series 1"       ' Name it
s.Elements.Add(e)         ' Add element e to series s.
Dim sc As New SeriesCollection() ' Instantiate a series collection
sc.Add(s)                 ' Add series s to the series collection sc. 

'The sc object now contains data we can chart which we add here.

Chart.SeriesCollection.Add(sc)

Shortcuts

.netCHARTING provides many shortcuts which can make adding data easier. The previous example can also be achieved using the following shortcuts.

Using Chart.Series shortcut.

[C#]
Element e = new Element();
e.Name = "Element 1";
e.YValue = 10;
Chart.Series.Add(e);
Chart.SeriesCollection.Add(); // Not passing parameters will add the contents of Chart.Series to the Chart.SeriesCollection collection.

[Visual Basic]
Dim e As New Element()
e.Name = "Element 1"
e.YValue = 10
Chart.Series.Add(e)
Chart.SeriesCollection.Add() ' Not passing parameters will add the contents of Chart.Series to the Chart.SeriesCollection collection.

Using the Chart.Element shortcut.

[C#]
Chart.Series.Element.YValue = 10;
Chart.Series.Element.Name = "Element 1";
Chart.Series.Elements.Add();
Chart.SeriesCollection.Add();

[Visual Basic]
Chart.Series.Element.YValue = 10
Chart.Series.Element.Name = "Element 1"
Chart.Series.Elements.Add()
Chart.SeriesCollection.Add()

Using all the shortcuts allows us to reduce the amount of lines necessary to achieve the same result from 8 to 4. The down side is that after the data is added using these shortcuts, it cannot be retrieved for further manipulation.

Take it to the next step

It is still possible to reduce the code even further using element constructors.

[C#]
Chart.SeriesCollection.Add(new Element("Element1",10));

[Visual Basic]
Chart.SeriesCollection.Add(New Element("Element1",10))

Now we took it from 8 lines to 1.

For more information on code shortcuts, see the Efficient Code tutorial.

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Data Model