C# datagridview 连接服务器oracle数据库

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 System.Data.OracleClient;
using System.Data.SqlClient;

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

        private void button1_Click(object sender, EventArgs e)
        {
            //string connstring = "Data Source=ouc131;user=ouc;password=letu;";//如果本地有oracle客户端的话，用这种连接
            string connstring = "User Id=ouc;Password=letu;Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=222.195.*.*)(PORT=1523))(CONNECT_DATA=(SID=ouc)));Unicode=True;";

            OracleConnection conn = new OracleConnection(connstring);
            try
            {
                conn.Open();
                OracleDataAdapter AdapterSelect = new OracleDataAdapter("select * from text", conn);
                DataTable dt = new DataTable();
                AdapterSelect.Fill(dt);
                dataGridView1.DataSource = dt.DefaultView;                
            }
            catch (Exception ee)
            {
                MessageBox.Show(ee.Message);
            }
            finally
            {
                conn.Close();
            }
        }
    }
}

<span>private</span> <span>static</span> <span>string</span> CONNECTION_STRING =
<span>"</span><span>User Id=myUserID;Password=myPassword;Data Source=(DESCRIPTION="</span> +
<span>"</span><span>(ADDRESS=(PROTOCOL=TCP)(HOST=myserver.server.com)(PORT=yourPort#))"</span> +
<span>"</span><span>(CONNECT_DATA=(SID=yourSID)));"</span>;