public static void storeLists()
{
ConnectionClass cc = new ConnectionClass();
cc.OpenConnection();
cc.DataReader("select itemid,iname,squantity from Stock where Bno=" + billNumber + "");
while (cc.reader.Read())
{
idList.Add(Convert.ToInt32(cc.reader["itemid"]));
nameList.Add(Convert.ToString(cc.reader["iname"]));
sqtyList.Add(Convert.ToInt32(cc.reader["squantity"]));
}
cc.CloseReader();
cc.CloseConnection();
}