//assign course to teacher (Save in AssignCourseTable)
public string CourseAssign(AssignCourseToTeacher assignCourse)
{
// check course already assigned or not
if (teacherGateway.IsAssigned(assignCourse))
{
return("Exists");
}
else
{
int rowsAffected = teacherGateway.CourseAssign(assignCourse);
if (rowsAffected > 0)
{
return("Success");
}
else
{
return("Failed");
}
}
}
