// save teacher in database
public string Save(Teacher teacher)
{
// check teacher email already exists or not
if (teacherGateway.CheckEmailExists(teacher.Email))
{
return("Exists");
}
else
{
int rowsAffected = teacherGateway.Save(teacher);
if (rowsAffected > 0)
{
return("Success");
}
else
{
return("Failed");
}
}
}
