Question
Can we disable the multi-selection?
Answer
Currently there is no property to turn of multiselection in the grid, we have added one in 2.0. But the workaround is to implement OnGridCellSelectChanged and call Gantt.Grid.GridStructure.ClearSelections in this implementation.
To avoid multiselect for time items you can implement the Gantt.OnTimeItem_SelectionChanged event, and simply call Gantt.ClearSelected from inside this call…