I'm modifying an older application that uses JQGrid and I can't seem to figure this out. Dropdownlist image
I have a select box for the filter that contains all the options + ':All' which selecting 'All' will return all results. I have some columns that can be nullable or empty string. How would I append to the searchoptions:{value:":All; value1:Item1; value2:Item2"} so that it would only return the empty or null items when selected and still have the 'All' functionality.
The only thing I can think of is changing the search options to searchoptions:{value:":All; -1:Unassigned; value1:Item1; value2:Item2"} modifying the json to replace '-1' instead of null or empty string... but that isn't clean.