public static void AddSuper(string add_supervisor)
{
List <SomerenModel.Supervisor> supervisors = new List <SomerenModel.Supervisor>();
// to get data from DataBase
supervisors = SomerenDB.DB_getSupervisors();
List <string> supervisorsStrings = new List <string>();
foreach (SomerenModel.Supervisor supervisor in supervisors)
{
supervisorsStrings.Add(supervisor.getLastName().ToLower());
}
// validation if the teacher is a supervisor
if (supervisorsStrings.Contains(add_supervisor.ToLower()))
{
// show a message
MessageBox.Show("This teacher is already a supervisor! Choose another one!",
"Warning", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
SomerenDB.DB_AddSupervisor(add_supervisor);
}
}