Triggers are not like stored procedures or functions. Normally you can
decompose your trigger logic into 2 items, 1 being the trigger, the
other being a stored procedure that the trigger can then call. This way,
you can also call the stored procedure from ASP.NET.
If that is not possible, a kludge is to issue a SQL statement that will
fire the trigger. For example, if you have an update trigger on column
XYZ, then if you issue an UPDATE table SET XYZ = XYZ (dummy SQL
statement to force trigger fire), that should do it, but I wouldn't
recommend it over the first option.
Shan