Hello Drpoalim,

If you need to create multiple levels of headers or group them into categories, enabling multi-column headers provides this functionality. The GroupField object is a field that accepts other columns in its columns collection. The header of the GroupField then displays above the columns in its columns collection.

You may find the following links helpful to configure this feature

http://help.infragistics.com/NetAdvantage/ASPNET/2012.1/CLR4.0/?page=WebDataGird_Multi_Column_Headers.html

http://es.infragistics.com/products/aspnet/sample/data-grid/multi-column-headers

Please let me know if you have any further questions regarding this matter.