In a .net web service that I'm writing, I'm having trouble converting from a COM to non COM object. The destination object is an ArcServer geometry service polygonN. The source is an IFeature. Is there some intermediate step to go through?
Private Sub FindShape(ByRef pPolygon As my_geometry_service.PolygonN, _
ByVal pFeature As IFeature)
Try
If pFeature Is Nothing Then
Throw New Exception("Input feature is nothing.")
End If
pPolygon = CType(pFeature.Shape, my_geometry_service.PolygonN) ' *** error ***
Catch ex As Exception
Throw New Exception(ex.Message)
End Try
End Sub
Error Message:
Unable to cast COM object of type 'System.__ComObject' to class type 'MyProject.my_geomety_service.PolygonN'. Instances of types that represent COM components cannot be cast to types that do not represent COM components; however they can be cast to interfaces as long as the underlying COM component supports QueryInterface calls for the IID of the interface.
Thanks in advance for any help with this.
Bill
