public static List <Enrollment> GetEnrollmentForACourse(string cnum = null, string userName = null)
{
if (userName != null)
{
long studentId = RepositoryAuth.VerifyUser(userName);
if (studentId == 0)
{
throw new Exception("Error!!");
}
else
{
if (cnum == null)
{
return(RepositoryRegistrar.GetEnrollmentForACourse(null, studentId));
}
else
{
return(RepositoryRegistrar.GetEnrollmentForACourse(cnum, studentId));
}
}
}
else
{
return(RepositoryRegistrar.GetEnrollmentForACourse(cnum, 0));
}
}
public static bool SignUpCourse(string username, string cnum, string semester)
{
bool res = false;
long studentId = RepositoryAuth.VerifyUser(username);
try
{
if (studentId != 0)
{
List <Enrollment> cs = RepositoryRegistrar.GetEnrollmentForACourse(cnum, studentId);
if (cs.Count == 0)
{
if (RepositoryRegistrar.CheckPrerequisiteCourseTaken(studentId, cnum))
{
res = RepositoryRegistrar.SignUpCourse(studentId, cnum, semester);
}
}
}
}
catch (Exception)
{
throw;
}
return(res);
}