.net连接oracle数据库---Shinepans

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

2.连接字符串:

 globals.connectionString = "Data Source="+this.databaseName.Text.Trim()+";uid="+this.username.Text.Trim()+";pwd="+this.password.Text.Trim()+";";
            globals.username = this.username.Text.Trim();
            globals.databaseName = this.databaseName.Text.Trim();

3.查询:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace Net3._5_oracleTest
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new LoginForm());
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OracleClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Net3._5_oracleTest
{
    public partial class LoginForm : Form
    {
        public LoginForm()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            globals.connectionString = "Data Source="+this.databaseName.Text.Trim()+";uid="+this.username.Text.Trim()+";pwd="+this.password.Text.Trim()+";";
            globals.username = this.username.Text.Trim();
            globals.databaseName = this.databaseName.Text.Trim();
            OracleConnection conn = new OracleConnection(globals.connectionString);
            try
            {
                conn.Open();
                MessageBox.Show("已连接到Oracle数据库!");
                MainForm mf = new MainForm();
                this.Hide();
                mf.Show();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }finally
            {
                conn.Close();
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.OracleClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace Net3._5_oracleTest
{
    public partial class LoginForm : Form
    {
        public LoginForm()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            globals.connectionString = "Data Source="+this.databaseName.Text.Trim()+";uid="+this.username.Text.Trim()+";pwd="+this.password.Text.Trim()+";";
            globals.username = this.username.Text.Trim();
            globals.databaseName = this.databaseName.Text.Trim();
            OracleConnection conn = new OracleConnection(globals.connectionString);
            try
            {
                conn.Open();
                MessageBox.Show("已连接到Oracle数据库!");
                MainForm mf = new MainForm();
                this.Hide();
                mf.Show();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }finally
            {
                conn.Close();
            }
        }
    }
}

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

namespace Net3._5_oracleTest
{
    public partial class GrideViews_UserInfo : Form
    {
        public GrideViews_UserInfo()
        {
            InitializeComponent();
        }

        private void GrideViews_UserInfo_Load(object sender, EventArgs e)
        {
            string sql1 = "SELECT * FROM infoofuser";
            OracleConnection myconn = new OracleConnection(globals.connectionString);
            OracleCommand mycmd = myconn.CreateCommand();
            mycmd.CommandText = sql1;
            myconn.Open();
            OracleDataAdapter oraDA = new OracleDataAdapter(mycmd);
            DataSet ds = new DataSet();
            oraDA.Fill(ds);
            myconn.Close();
            DataTable dtbl = ds.Tables[0];
            this.dataGridView1.DataSource = dtbl;
        }
    }
}