In version 11.1, we'll be adding support for group intervals for date-time columns in XtraGrid, our WinForms grid. In server mode, no less, in order to minimize the data transferred across the wire. You’ll be able to change group intervals via a single property setting in server mode in the exactly the same way as you do in regular binding mode.
The following animated image shows the user changing a column's group interval in XtraGrid:
(Click to make larger.) I do like the “Smart” grouping interval, I must say.
There’s more new WinForms sneak peeks coming. Stay tuned.