MPolygon not work in Civil 2012

[Anonymous]

In Civil 2012 the type MPolygon is recognized in VSS2010, but when I get the object (using transaction.GetObject) it is not of the type MPolygon but of the type ImpEntity. Casting explicitly to MPolygon fails.

In Civil 2011 is working fine.

Does anyone have an idea how to solve this?

[Anonymous]

Hi,

We have noticed that already and informed our engineering team for an appropriate fix. In the meantime, here is a workaround using the RXClass which resolves this issue in 2012 release. I am sharing the relevant code snippet below -

                   using (DBObject obj = tr.GetObject(mP, OpenMode.ForWrite))

                    {

                        MPolygon mpoly = null;

                        if (obj.GetRXClass() ==

                             RXClass.GetClass(typeof(MPolygon)))

                        {

                            mpoly =

                            (MPolygon)DisposableWrapper.Create(

                            typeof(MPolygon),

                            obj.UnmanagedObject, obj.AutoDelete);

                            Interop.DetachUnmanagedObject(obj);

                        }

                        if (mpoly != null)

                        {

                            // Do something with the MPolygon

                        }

                        else

                        {

                            doc.Editor.WriteMessage("\nNOT an MPolygon ...\r\n");

                        }

                     }

Hope this helps,

Partha Sarkar

Autodesk Developer Network