using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Oracle.DataAccess.Client;

namespace OracleDataAccess
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            OracleConnection connection = new OracleConnection("Data Source=orcl;User ID=uqbuy;Password=root");

            connection.Open();

            OracleCommand cmd = new OracleCommand("select * from test") { Connection = connection, ArrayBindCount = 10 };

            OracleDataAdapter adapter = new OracleDataAdapter(cmd);
            DataTable dt = new DataTable();
            adapter.Fill(dt);

            connection.Close();
        }
    }
}

.Net 连接Oracle 数据库写法