topic IMapTopology.AddClass: NotImplementedException in ArcObjects SDK Questions

IMapTopology.AddClass: NotImplementedException

Marc-OlivierEthier — Thu, 07 Feb 2013 19:16:07 GMT

Hi,

Is it normal that in ArcGIS for Desktop 10.1

_topologyExt.MapTopology.AddClass(_featClass)

throw Exception: NotImplementedException occured: {"The method or operation is not implemented."} ?

And

TypeOf _featClass Is ITopologyClass

return False ?
Is there a way to obtain a IMapTopology2 from ITopologyExtension ?

Re: IMapTopology.AddClass: NotImplementedException

Anonymous User — Thu, 07 Feb 2013 20:48:43 GMT

The exception is expected. Map topologies are layer based in 10.1 rather than feature class based. You can use the IMapTopology2.AddLayer method to add feature layers to the map topology. Also take a look at the Working with topologically related features help topic for examples on casting the topology extension.

Re: IMapTopology.AddClass: NotImplementedException

Anonymous User — Sun, 12 Dec 2021 06:37:44 GMT

The following works for me.

      UID extUid = new UIDClass();
      extUid.Value = "esriEditorExt.TopologyExtension";
      ITopologyExtension topologyExt = ArcMap.Application.FindExtensionByCLSID(extUid) as ITopologyExtension;
      IMapTopology2 mt2 = topologyExt.MapTopology as IMapTopology2;
      ArcMap.Application.StatusBar.set_Message(0, mt2.LayerCount.ToString());