在gridview中显示空行以及填充的行

I am trying to show 4 rows in a gridview. If i have 2 rows in Database, i should show 2 filled rows and 2 empty, if i have 4 in database, show 4 filled rows and if i have none in the database, show 4 empty rows. How is this possible?I am trying to show 4 rows in a gridview. If i