You would need to have the DisplayLayout.SelectTypeRowDefault set to Extended. Then shift clicking or control clicking will select based on the normal patterns.
Is this the only property that needs set? I have tried to set this for my grid and it doesnt seem to work. Also when I double click my RowSelector it gives me a little dialogue next to it with a ok/cancel button, how do I turn that off?
Hello,
In case anyone else stumbles upon this via search, please check out the solution in this forum thread
http://forums.infragistics.com/forums/t/14224.aspx
Basically the idea is that by default SelectedRowStyle is not set, there is not a visual clue that suggest the several rows are in fact suggested. Setting a different SelectedRowStyle than the default should address the problem.