Code

<ndiag:NodeListView runat="server" ID="nodeList" ...
...
var node = new MindFusion.Diagramming.ShapeNode();
node.Text = shapes[i];
node.Shape = Shape.FromId(shapes[i]);
nodeList.AddNode(node, shapes[i]);
 

Code

// The template class that adds the node lists to the items
public class AccordionItemTemplate : ITemplate
{
  // Initialize the item with the node list to display
  public AccordionItemTemplate(NodeListView nodeList)
  {
    this.nodeList = nodeList;
  }
  private NodeListView nodeList;

  // ITemplate.InstantiateIn implementation to add the node list to the item's controls collection
  public void InstantiateIn(System.Web.UI.Control container)
  {
    container.Controls.Add(this.nodeList);
  }
}

// ...

// Create the node list for the item
NodeListView nodeList1 = new NodeListView();
nodeList1.ID = "nodeList1";

// Add some nodes
var node = new MindFusion.Diagramming.ShapeNode();
node.Text = "Actor";
node.Shape = Shape.FromId("Actor");
nodeList1.AddNode(node, "Actor");

node = new MindFusion.Diagramming.ShapeNode();
node.Text = "Ellipse";
node.Shape = Shape.FromId("Ellipse");
nodeList1.AddNode(node, "Ellipse");

// Create an AccordionItem and assign it's template
var item1 = new AccordionItem();
item1.ID = "AccordionItem" + (Accordion1.Items.Count + 1).ToString();
item1.Title = "AccordionItem " + (Accordion1.Items.Count + 1).ToString();

item1.Template = new AccordionItemTemplate(nodeList1);

// Add the created item to the parent Accordion
Accordion1.Items.Add(item1);

// ... Create more items in a similar manner and add them to the parent accordion ...

// Finally, call the DataBind method on the Accordion
Accordion1.DataBind();