Forum Post: addPreSearch not working in dynamics crm 365 9.0

Hi experts, I am filtering district lookup based on a hardcoded district name value but it is not working on form load javascript code is like this var fltr = " "; Xrm.Page.getControl("new_district").addPreSearch(AddFilter(fltr )); function AddFilter(filterStr) { Xrm.Page.getControl("new_district").addCustomFilter(filterStr); }