Hi Daniel,
Thank you for your interest in Syncfusion Products.
The GridGroupingControl allows the user to span a column across multiple grid rows or columns using GridColumnSpanDescriptor,
which provides information about a column that can span multiple grid rows or columns. Please refer the code snippet below to achieve
this.
The above GridColumnSpanDescriptor defines the column set that comprises the Address, City and PostalCode fields.
Also please refer the sample below which illustrates multi-Row and merged header in a GridGroupingControl and the sample files can be downloaded from "Download source".
http://websamples.syncfusion.com/samples/Grid.Web/6.4.0.15/GGC_Web_ColumnSpanning/main.htmPlease check link below for online sample.
http://www.syncfusion.com/sfwebsamples/grid.grouping.web/samples/2.0/MergedRows/MultiEmployeeRecords/CS/MultiEmpRecords.aspxPlease let me know if this samples helps you.
Thanks,
Rekha