C#中调用类中定义的共用类中的方法

using System.Data.OracleClient;

 

        DB_Conn dcon = new DB_Conn();
        DataSet ds = new DataSet();

        public Form2()
        {
            InitializeComponent();

 

            //Soulation 1
            //OracleConnection con = new OracleConnection();

            //m_strConnection = "Data Source=LGETRKB.WORLD;" +
            //                  "Persist Security Info=false;" +
            //                  "Unicode=True;" +
            //                  "User ID=oraknbn;" +
            //                  "Password=rksvks2006";
            //con.ConnectionString = m_strConnection;
            //con.Open();
            //OracleDataAdapter dt = new OracleDataAdapter("select * from tb_comp_lotid_mapping",con);
            // DataSet ds = new DataSet();
            //dt.Fill(ds);

            //Soulation2
            ds = dcon.ExceDS("select * from tb_comp_lotid_mapping");

            dataGridView1.DataSource = ds.Tables[0];

 

}