1.引入OracleClient，安装Oracle后添加引用

using System.Data.OracleClient;

2.

//User Id为用户名，Password为密码，数据名为First           

OracleConnection conn = new OracleConnection("User Id=system;Password=sa;Data Source=First");
conn.Open();

OracleDataAdapter oda = new OracleDataAdapter("select * from SH.TIMES", conn);
           
DataSet ds = new DataSet();
oda.Fill(ds);

this.GridView1.DataSource = ds.Tables[0].DefaultView;
this.GridView1.DataBind();

conn.Close();