I have a multi-select parameter that can have a list of thousands of entries. In general, the user will pick a few entries from the list or "Select All". If they check "Select All", I would much prefer that I get a NULL or an empty string instead of a list of all values. Is there any way to do that?
In experimenting with a work-around, I tried putting an "All" label with a null value in the list, but it is ignored (does not display in the drop-down). If I use an empty string for the value, my "All" entry does get displayed, but so does "Select All", which is confusing. Is there a way to suppress "Select All"?
- Mark