/*public int AddTransactionByStudentId(int id, string source, double amount)
* {
* return TransactionsManager.AddTransactionByStudentId(id, source, amount).id;
* }
*
*
* public int AddTransactionByStudentUId(int uid, string source, double amount)
* {
* return TransactionsManager.AddTransactionByStudentUId(uid, source, amount).id;
* }
*
* public int AddTransactionByStudentCardId(int cardid, string source, double amount)
* {
* return TransactionsManager.AddTransactionByStudentCardId(cardid, source, amount).id;
* }*/
public bool TransactionPayOnline(string username, double amount)
{
return(TransactionsManager.AddTransactionByUsername(username, "PayOnline", amount) != -1);
}