i try a lot of commands to disable tables constraints in my database to make truncate to all tables but still now it give me the same error
Cannot truncate table '' because it is being referenced by a FOREIGN KEY constraint.
i try

EXEC sp_msforeachtable "ALTER TABLE ? NOCHECK CONSTRAINT all"
EXEC sp_MSforeachtable "TRUNCATE TABLE ?"

and i tried this for each table

ALTER TABLE [Table Name] NOCHECK CONSTRAINT ALL  
truncate table [Table Name]
ALTER TABLE [Table Name] CHECK CONSTRAINT ALL  

and every time i have the previous error message .. could any please help me to solve sucha a problem ?