Oracle数据库监听服务无法启动

（1） 安装好Oracle后，启动Net Manager，测试orcl失败，报错“ORA-12514: TNS: 监听程序当前无法识别连接描述符中请求的服务”，需要修改监听文件。
修改前：

# listener.ora Network Configuration File: D:\Soft\oracle10g\listener.ora

# Generated by Oracle configuration tools.

 

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = CLRExtProc)

\dbhome_1)

(PROGRAM = extproc)

(ENVS = "EXTPROC_DLLS=ONLY:D:\Oracle11g\product\11.2.0\dbhome_1\bin\oraclr11.dll")

)

)

 

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

))

)

)

 

ADR_BASE_LISTENER = D:\Oracle11g

修改后：

# listener.ora Network Configuration File: D:\Soft\oracle10g\listener.ora

# Generated by Oracle configuration tools.

 

SID_LIST_LISTENER =

(SID_LIST =

(SID_DESC =

(SID_NAME = CLRExtProc)

\dbhome_1)

(PROGRAM = extproc)

)

(SID_DESC =

(GLOBAL_DBNAME = ORCL)

\dbhome_1)

(SID_NAME = ORCL)

)

)

 

LISTENER =

(DESCRIPTION_LIST =

(DESCRIPTION =

(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))

)

(DESCRIPTION =

))

)

)

 

ADR_BASE_LISTENER = D:\app\Administrator

 

这样修改之后貌似都没问题了。

（2）C#连接不上Oracle 9i数据库（连接Oracle11g没问题。）
    问题描述：用PLSQL Developer可以登录，客户端不能登录，报错“ORA-12154:TNS:无法处理服务名” ,解决方法：