ReadVisibility ( ExcelTableReader.ExcelTableRow oRow, GroupVisibilityConverter oGroupVisibilityConverter, String sGroupName, HashSet<String> oSkippedGroupNames, HashSet<String> oHiddenGroupNames ) { Debug.Assert(oRow != null); Debug.Assert(oGroupVisibilityConverter != null); Debug.Assert( !String.IsNullOrEmpty(sGroupName) ); Debug.Assert(oSkippedGroupNames != null); Debug.Assert(oHiddenGroupNames != null); AssertValid(); // Assume a default visibility. Visibility eVisibility = Visibility.Show; String sVisibility; if ( oRow.TryGetNonEmptyStringFromCell( CommonTableColumnNames.Visibility, out sVisibility) && !oGroupVisibilityConverter.TryWorkbookToGraph( sVisibility, out eVisibility) ) { OnInvalidVisibility(oRow); } if (eVisibility == Visibility.Skip) { oSkippedGroupNames.Add(sGroupName); } else if (eVisibility == Visibility.Hide) { oHiddenGroupNames.Add(sGroupName); } }