Topology Dissolve – Expression

[dohenry]

Hi All

I’m have trouble with my code for creating a Dissolved Topology, in particular with the Expression.

I can't find any examples etc.

Would anyone have an example or be able to give some advice on this.

The Field and Object Data Table already exist.

        Dim topoModel As TopologyModel = Nothing
        Dim app As MapApplication = HostMapApplicationServices.Application
        Dim topos As Topologies = app.ActiveProject.Topologies

        Dim odDataField As ObjectDataField
        odDataField.ODFieldName = "FieldName"
        odDataField.ODTableName = "ODTableName"

        If topos.Exists(strTopoName) Then

            topoModel = topos.Item(strTopoName)

            topoModel.Dissolve(":FieldName@ODTableName", "Dissolve_Test", "Dissolve Test", odDataField)

        End If

I tried the above code and get the following error as attached.

I also need to dissolve the topo to get a outline boundary of the Topology and propose to do this using the Layer Property would any one know this expression I tried the following among other variation, but got the same error as above.

topoModel.Dissolve(":Property.Layer", "Dissolve_Test")

Any help on this matter would be greatly received.

Thank You.