Gets the ObjectID of the active row in the table. The value of the row can be null, when the table does not have object ids, the active row is the new row, or the data for the row has not been loaded.

Public ReadOnly Property ActiveObjectId As Nullable(Of Long)

public Nullable<long> ActiveObjectId {get;}

{
  // get the active objectID
  long? OID = tableView.ActiveObjectId;
}