I found a couple of problems with sorting in the latest WinForms RadGridView (2011.1.11.315). I use Visual Studio 2008 with .NET 3.5.
I have created a single form with a RadGridView.
The grid sorting is set in the Property Builder. But when line
is executed, the SortDescriptors collection is cleared and the grid becomes unsortable. This worked well in v.2010.3.10.1215.
Another problem concerns the custom sorting. I found that the CustomSorting handler is not called if the SortDescriptors collection is empty. I think this is not correct behavior, because the custom sorting logic is coded explitly and it should not depend on the grid sort descriptiors. If we note the first problem listed above, the CustomSorting handler is not called until the SortDescriptors collection is explicitly populated with the application code, or the column header is clicked by user.