C# 连接oracle步骤

            //1、添加引用 System.data.oracleClient            //2、设置连接字符串  data source是服务名(也就是在客户端sqlplus中需要输入的主机字符串)            //3、以下用法和sqlserver Access 用法一直            string strConn = "data source=oamis;user=scott;password=tiger;";            OracleConnection conn = new OracleConnection(strConn);            conn.Open();            OracleCommand cmd = new OracleCommand();            cmd.CommandText = "select * from emp";            cmd.Connection = conn;            DataSet ds = new DataSet();            OracleDataAdapter ad = new OracleDataAdapter(cmd);            ad.Fill(ds);

现在机器上用sqlplus连接 然后在调用上面方法,sqlplus都连不进去,上面方法肯定不行