I have a text box that filters a multiselect resource. After filtering, if select a item in the filtered list the hidden selections are deselected.
I would like the multiselect resource to maintain the existing selections, and add the new selections to the multiselect that are shown from the filter.
Found the fix.
I was using a sql query to filter the multiselect listbox programmatically during the search, when all I really needed to do was use the listboxes own Search Term setting referencing the search box value. That's what happens when you think too much lol.