Hello together,
in the examples IG.Groupobject.add(2), ig.Group the grouping create an group on the col that i
give him. IG creates(very smart) the Grouping. How can i write in then row where the Button is?
background: i want to wite the summary off the grouped data in this row.
Thank you
In the general case you need to use the AfterAutoGroupRowCreated event if you want to place additional info into every group row created during automatic grouping.

If you need to calculate some total values, you can use the code from the Subtotal Manager sample from the online extra sample library for iGrid: