I have various tables loaded in my app; and I want to stay selection of a field fixed. So the user can't deselect them. Is there any way to do that?
You can right click on the list box and select 'Lock' and the selection/s should turn blue
Yes, it's OK, but is there any way to hide entirely this? For preventing that the user unlock them.
For hiding you can check this out: HidePrefix – hiding fields
But you still might need to Lock the field down. Why do you even bring the non-selected values in. Remove them in the script?
It's a good idea but I try to filter it and I can't.
SQL SELECT ...
WHERE fieldname = 'S' and don't works. How can I filter char values?
What error are you receiving?
It now works. My mistake.
Or just TAG FIELDS ... WITH $hidden; from your script
Retrieving data ...