string QuerySqlString = "SELECT  DBA04.NCYL  \"年产油量\"  FROM DBA04   ";
        private void Form2_Load(object sender, EventArgs e)
        {
            this.dataGridView1.DataSource = OracleGetData();
            this.dataGridView2.DataSource = DonetGetData();

        }
        public DataTable DonetGetData()
        {
            DataTable dt = null;
            string strcon = "Data Source=orcl;User Id=kfzxca;Password=kfzxca;";
            using (System.Data.OracleClient.OracleConnection con = new System.Data.OracleClient.OracleConnection(strcon))
            {
                con.Open();
                System.Data.OracleClient.OracleCommand cmd = con.CreateCommand();
                cmd.CommandText = QuerySqlString;
                System.Data.OracleClient.OracleDataAdapter dap = new System.Data.OracleClient.OracleDataAdapter();
                dap.SelectCommand = cmd;
                dt = new DataTable();
                dap.Fill(dt);
                con.Close();

            }
            return dt;
        }
        public DataTable OracleGetData()
        {
            DataTable dt = null;
            string strcon = "Data Source=orcl;User Id=kfzxca;Password=kfzxca;";
            using (Oracle.DataAccess.Client.OracleConnection con = new Oracle.DataAccess.Client.OracleConnection(strcon))
            {

                con.Open();
                Oracle.DataAccess.Client.OracleCommand cmd = con.CreateCommand();
                cmd.CommandText = QuerySqlString;
                Oracle.DataAccess.Client.OracleDataAdapter dap = new Oracle.DataAccess.Client.OracleDataAdapter();
                dap.SelectCommand = cmd;
                dt = new DataTable();

                dap.Fill(dt);
                con.Close();
            }
            return dt;
        }
绑定后的结果

数据库字段类型 NCYL  NUMBER(8,4)； 


急 求教下。