private void MakeGui()
        {
            cmbDatabaseViews.Items.Clear();
            cmbRefFeatureClass.Items.Clear();

            if (_dataset == null)
            {
                return;
            }

            foreach (IDatasetElement element in _dataset.Elements)
            {
                if (element.Class is IFeatureClass)
                {
                    if (element.Class.Name.Contains("@"))
                    {
                        continue;
                    }
                    cmbRefFeatureClass.Items.Add(new FeatureClassItem((IFeatureClass)element.Class));
                }
            }

            AccessFDB fdb = _dataset.Database as AccessFDB;

            if (fdb != null)
            {
                foreach (string view in fdb.DatabaseViews())
                {
                    IFields fields = fdb.TableFields(view);
                    if (fields == null ||
                        fields.FindField("FDB_OID") == null ||
                        fields.FindField("FDB_SHAPE") == null ||
                        fields.FindField("FDB_NID") == null)
                    {
                        continue;
                    }

                    cmbDatabaseViews.Items.Add(view);
                }
            }
        }