...

// create the tree data source importer
treeImporter = new NTreeDataSourceImporter();

// set the document in the active layer of which the shapes will be imported
treeImporter.Document = document; 

// set the data source
// NOTE: In this example we assume the that oleDbDataAdapter1 selects the Pages table described above
treeImporter.DataSource = oleDbDataAdapter1;

// records are uniquely identified by their Id column
// records link to their parent record by their ParentId column
treeImporter.IdColumnName = "Id";
treeImporter.ParentIdColumnName = "ParentId";

// create vertices as rectangles shapes
NBasicShapesFactory shapesFactory = new NBasicShapesFactory();
treeImporter.VertexShapesFactory = shapesFactory;
treeImporter.VertexShapesName = BasicShapes.Rectangle.ToString();
 
// use layered tree layout
NLayeredTreeLayout layout = new NLayeredTreeLayout();
layout.Direction = LayoutDirection.LeftToRight;
layout.OrthogonalEdgeRouting = true;
layout.LayerAlignment = RelativeAlignment.Near;
treeImporter.Layout = layout;

// subscribe for the vertex imported event,
// which is raised when a shape was created for a data source record
treeImporter.VertexImported += new ShapeImportedDelegate(OnVertexImported);

// import
treeImporter.Import();

...

private void OnVertexImported(NDataSourceImporter importer, NShape shape, INDataRecord dataRecord)
{
    // display the page title in the shape
    object text = dataRecord.GetColumnValue("Title");
    if (text == null)
    {
        shape.Text = "Title not specified";
    }
    else
    {
        shape.Text = text.ToString();
    }
    shape.SizeToText(new NMarginsF(10));
    // make the URL a tooltip of the shape
    object url = dataRecord.GetColumnValue("URL");
    if (url == null || url.ToString().Length == 0)
    {
       shape.Style.InteractivityStyle = new NInteractivityStyle("URL not specified");
    }
    else
    {
        shape.Style.InteractivityStyle = new NInteractivityStyle(url.ToString());
    }
}

// configure the graph data source importer
graphImporter = new NGraphDataSourceImporter();

// set the document in the active layer of which the shapes will be imported
graphImporter.Document = document; 

// set the data source
// NOTE: In this example we assume the that PagesDataAdapter selects the Pages table
// while the LinksDataAdapter selects the Links table
graphImporter.VertexDataSource = PagesDataAdapter;
graphImporter.EdgeDataSource = LinksDataAdapter;

// vertex records are uniquely identified by their Id (in the Pages table)
// edges link the vertices with the FromPageId and ToPageId (in the Links table)
graphImporter.VertexIdColumnName = "Id";
graphImporter.FromVertexIdColumnName = "FromPageId";
graphImporter.ToVertexIdColumnName = "ToPageId";

// create vertices as rectangle shapes
NBasicShapesFactory shapesFactory = new NBasicShapesFactory();
graphImporter.VertexShapesFactory = shapesFactory;
graphImporter.VertexShapesName = BasicShapes.Rectangle.ToString();

// use layered graph layout NLayeredGraphLayout
layout = new NLayeredGraphLayout();
layout.Direction = LayoutDirection.LeftToRight;
layout.LayerAlignment = RelativeAlignment.Near;
graphImporter.Layout = layout;

// subscribe for the vertex imported event,
// which is raised when a shape was created for a data source record
graphImporter.VertexImported += new ShapeImportedDelegate(OnVertexImported);

// import
graphImporter.Import();
...


private void OnVertexImported(NDataSourceImporter importer, NShape shape, INDataRecord dataRecord)
{
    // display the page title in the shape
    object text = dataRecord.GetColumnValue("Title");
    if (text == null)
    {
        shape.Text = "Title not specified";
    }
    else
    {
        shape.Text = text.ToString();
    }
    shape.SizeToText(new NMarginsF(10));  

    // make the URL a tooltip of the shape
    object url = dataRecord.GetColumnValue("URL");
    if (url == null || url.ToString().Length == 0)
    {
       shape.Style.InteractivityStyle = new NInteractivityStyle("URL not specified");
    }
    else
    {
        shape.Style.InteractivityStyle = new NInteractivityStyle(url.ToString());
    }
}