How to Fire a trigger when you do TRUNCATE (instead deleted) in MSSQL
You can't do this on SQL server.
From MSDN
TRUNCATE TABLE cannot activate a trigger because the operation does not log individual row deletions. For more information, see CREATE TRIGGER (Transact-SQL).
From msdn:
TRUNCATE TABLE cannot activate a trigger because the operation does not log individual row deletions.
Are you letting users run TRUNCATE TABLE ad hoc / willy nilly? If not, instead of worrying about using a trigger, why not wrap the TRUNCATE command in a stored procedure that also deals with whatever the trigger would have done after the truncate finished? (But you'd have to do it in the opposite order, of course.)