I export data from my grid to Excel (v2013.1.422.45). Data grouped by some field.
var options = new GridViewExportOptions
Format = ExportFormat.ExcelML,
ShowColumnHeaders = true,
ShowColumnFooters = true,
ShowGroupFooters = true,
Encoding = Encoding.UTF8
Groups are missing. I tried to use ElementExporting handler but there is no event with ExportElement.GroupHeaderRow (GroupHeaderCell, GroupIndentCell) data (just Footer).