vs链接oracle11g的链接字符串

/// <summary>
        /// 初始化数据库连接
        /// </summary>
        /// <param name="IP">ip地址</param>
        /// <param name="DBName">数据库名</param>
        /// <param name="userName">用户名</param>
        /// <param name="passwd">密码</param>
        public ORACLE_DBWork(string IP,string DBName,string userName,string passwd)
        {
            connStr = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST="+IP+")(PORT=1521))(CONNECT_DATA=(SID="+DBName+")));User ID="+userName+";Password="+passwd+";";
            
            oracle_conn = new OracleConnection(connStr);
            oracle_conn.Open();
        }