public double GetBalanceByStudentCardId(int cardid)
{
int studentId;
try
{
studentId = StudentsManager.GetStudentIdByCardId(cardid);
}
catch (ApplicationException ex)
{
return(-1);
}
return(TransactionsDB.GetBalanceByStudentId(studentId));
}
public double GetBalanceByStudentUsername(string username)
{
int studentId;
try
{
studentId = StudentsManager.GetStudentByUsername(username);
}
catch (ApplicationException ex)
{
return(-1);
}
return(TransactionsDB.GetBalanceByStudentId(studentId));
}
public double GetBalanceByStudentId(int id)
{
return(TransactionsDB.GetBalanceByStudentId(id));
}