class Sample
{
    public static void Main()
    {
        string myConnString = "user id=zk;data source=zkqx;password=*****";
        OracleConnection myConnection = new OracleConnection(myConnString);

        OracleCommand catCMD = myConnection.CreateCommand();
        catCMD.CommandText = " SELECT CZYDM,CZYMC,CZYMM,CZYQX FROM ZC_CZY ";

        myConnection.Open();

        OracleDataReader myReader = catCMD.ExecuteReader();

        while (myReader.Read())
        {
            Console.WriteLine("\t{0}\t{1}\t{2}\t{3}", myReader.GetString(0),myReader.GetString(1),myReader.GetString(2),myReader.GetString(3));
        }

        myReader.Close();

        myConnection.Close();
    }
}