I have some Actions on a Save button Behavior for a new form.
After "Save Form" I have a "Update List Item".
My List item ID is
=[[@Web.GetFirstValueForQuery('Purchase Orders', '<Where><Eq><FieldRef Name=Author LookupId=True /><Value Type=User ><UserID/></Value></Eq></Where><OrderBy><FieldRef Name=Created Ascending=False /></OrderBy>', 'ID')]]
...and I then assemble a PO Number
This works fine and gives me a Purchase Order Number like "HA-12"
I'd like to format the [[ID]] so it looks something more like "HA-00012", and ideally, add a specified value, such as "1000" so I can have "HA-01012" and make it compatible with the client's present numbering system.
How would I write the expression for that?