DrawingEnumeratorBase Class

[SerializableAttribute]
public abstract class DrawingEnumeratorBase : IEnumerator

<SerializableAttribute>
Public MustInherit Class DrawingEnumeratorBase
	Implements IEnumerator

using Tekla.Structures.Drawing;
using System.Windows.Forms;

public class Example
{
       TreeView drawingListTreeView = new TreeView();
       DrawingHandler DrawingHandler = new DrawingHandler();
       CheckBox ShowViews = new CheckBox();
       CheckBox ShowObjectsInViews = new CheckBox();

       private void AddDrawingInformationToDrawingListTreeView()
       {
           drawingListTreeView.Nodes.Clear();
           DrawingEnumerator DrawingList = DrawingHandler.GetDrawings(); // Get drawing list.

           while (DrawingList.MoveNext())
           {
               Drawing CurrentDrawing = DrawingList.Current;

               // Add the drawing name to the UI tree.
               TreeNode DrawingNode = new TreeNode();
               DrawingNode.Tag = CurrentDrawing;
               DrawingNode.Text = "" + CurrentDrawing.GetType();

               if (ShowViews.Checked)
                   AddChildDrawingObjectsToTreeNode(DrawingNode, CurrentDrawing.GetSheet()); // Add all the objects placed to the sheet to the UI tree.
               drawingListTreeView.Nodes.Add(DrawingNode);
           }
       }

       private void AddChildDrawingObjectsToTreeNode(TreeNode Node, Tekla.Structures.Drawing.IHasChildren CurrentContainer)
       {
           DrawingObjectEnumerator ObjectList = CurrentContainer.GetObjects(); // Gets the objects that are placed directly to the current container object.
           ObjectList.SelectInstances = false; // The instances don't need to be automatically selected, only whether the object exists or not has to be found out (objects properties are not used at all).

           while (ObjectList.MoveNext())
           {
               if(ShowObjectsInViews.Checked || ObjectList.Current is ViewBase)
               {
                   TreeNode CurrentNode = new TreeNode("" + ObjectList.Current.GetType());

                   CurrentNode.Tag = ObjectList.Current;

                   if (ObjectList.Current is Tekla.Structures.Drawing.IHasChildren)
                       AddChildDrawingObjectsToTreeNode(CurrentNode, ObjectList.Current as IHasChildren);

                   Node.Nodes.Add(CurrentNode);
               }
           }
       }
}