public LinkedList<LinkedList<string>> query(string query)
{
LinkedList<LinkedList<string>> result = null;
if (connect())
{
try
{
result = new LinkedList<LinkedList<string>>();
OracleDataReader result_table = new OracleCommand(query, con_link).ExecuteReader();
while (result_table.Read()) {
LinkedList<string> row = new LinkedList<string>();
for (int i = 0; i < result_table.FieldCount; i++)
{
row.AddLast(result_table[i].ToString());
}
result.AddLast(row);
}
result_table.Close();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
finally
{
disconnect();
}
}
return result;
}