public string EnrollCourse(StudentEnroll enroll)
{
if (!enrollGateway.IsEnrollExixts(enroll))
{
int rowAffect = enrollGateway.EnrollCourse(enroll);
if (rowAffect > 0)
{
return("Save Successful");
}
else
{
return("Save Failed");
}
}
else
{
return("A student can enroll in a course once only!!!");
}
}
