Daily Archives: 04/22/2011

Solution for ‘previousSibling’ is null or not an object error in grouped UltraWebGrid

Infragistics UltraWebGrid offers standard keyboard navigation for record selection. For example you can click a row, and holding Shift key press Down Arrow to select multiple records. This works fine for a flat grid, but try this with grid in OutlookGroupBy mode and you’ll get an error ‘previousSibling’ is null or not an object:

Error selecting records in grouped UltraWebGrid

After some digging I found the culprit. Continue reading →