C#连接oracle实现增删改查

以users表为例，有三个字段，自增长的编号id，int类型；名称name，nvarchar类型，密码pwd，nvarchar类型 首先在vs2005中引入System.Data.OracleClient;命名空间 publicint Insert(stringname, string pwd) { OracleConnectionconn = new OracleConnection(@D

以users表为例，有三个字段，自增长的编号id，int类型；名称name，nvarchar类型，密码pwd，nvarchar类型

首先在vs2005中引入System.Data.OracleClient;命名空间

        publicint Insert(stringname, string pwd)

        {

           OracleConnectionconn = new OracleConnection(@"Data Source=SBZX;User ID=simis;Password=zeda");

            conn.Open();

            stringsql = "insert into users(name,pwd)values(:name,:pwd)";

            OracleCommandcmd = new OracleCommand(sql,conn);

            OracleParameter parn = new OracleParameter(":name", name);

           cmd.Parameters.Add(parn);

            OracleParameter parp = new OracleParameter(":pwd", name);

           cmd.Parameters.Add(parp);

            int result = cmd.ExecuteNonQuery(); //result接收受影响行数，也就是说result大于0的话表示添加成功

            conn.Close();

            cmd.Dispose();

            return result;         

        }

        publicint Update(int id)

        {

OracleConnectionconn = new OracleConnection(@"Data Source=SBZX;User ID=simis;Password=zeda");

            conn.Open();

            stringsql = "delete from users where id=:id";

            OracleCommandcmd = new OracleCommand(sql,conn);

            OracleParameterpari = new OracleParameter(":id", id);

           cmd.Parameters.Add(pari);      

            int result = cmd.ExecuteNonQuery();  //result接收受影响行数，也就是说result大于0的话表示添加成功

            conn.Close();

            cmd.Dispose();

            return result;         

       }

        publicint Insert(stringname, string pwd, intid)

        {

            OracleConnectionconn = new OracleConnection(@"Data Source=SBZX;User ID=simis;Password=zeda");

            conn.Open();

            stringsql = "update users set name=:name,pwd=:pwdwhere id=:id";

            OracleCommandcmd = new OracleCommand(sql,conn);

            OracleParameterparn = new OracleParameter(":name", name);

           cmd.Parameters.Add(parn);

            OracleParameterparp = new OracleParameter(":pwd", name);

           cmd.Parameters.Add(parp);        

            OracleParameterpari = new OracleParameter(":id", id);

            cmd.Parameters.Add(pari); 

            intresult = cmd.ExecuteNonQuery();

            conn.Close();

            cmd.Dispose();

            returnresult;        

        }

        publicDataTable Select()

        {

            OracleConnectionconn = new OracleConnection(@"Data Source=SBZX;User ID=simis;Password=zeda");

            conn.Open();

            stringsql = "select * from users";

            OracleCommandcmd = new OracleCommand(sql,conn);

            OracleDataAdapteroda = new OracleDataAdapter(cmd);

            DataTable dt = new DataTable();

            oda.Fill(dt);

            conn.Close();

            cmd.Dispose();

            return dt;        

        }

方法写好后，下面举一个查询的例子，在form窗体中拖一个DataGridView,然后在Load方法中

    private void Form1_Load(object sender, EventArgs e)

        {

              dataGridView1.DataSource = Select();

        }

这样一运行，DataGridView中就会显示数据了