Reporting Services无法连接ORACLE，在服务器安装ORACLE 11客户端版本后仍然提示以下错误：

System.Data.OracleClient 需要 Oracle 客户端软件 8.1.7 或更高版本

如图：

使用DOS命令是可以连接到ORACLE的

Micsoft用来连接oracle的odbc驱动

没有直接的odbc驱动，需要安装oracle客户端的，安装oracle客户端后，再用 Net Configuration Assistant 配置一个NET服务名

需要检查以下：

1.安装的ORACLE版本与操作系统版本是否一样，例如操作系统是64位，ORACLE是32位，会令ODBC驱动安装不上。需要统一位数版本

2.配置环境变量，可参考 http://book.51cto.com/art/201204/327158.htm

附加其它

连接字符串：

Data Source="(DESCRIPTION =  ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.1.116)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = SEINESCM)
    )
  )"

服务器监听文件：C:\app\Administrator\product\11.2.0\client_1\network\admin\tnsnames.ora

# tnsnames.ora Network Configuration File: C:\app\Administrator\product\11.2.0\client_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

SEINESCM_32 =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.1.116)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = SEINESCM)
    )
  )

SEINESCM =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.10.1.116)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SERVICE_NAME = SEINESCM)
    )
  )

服务器监听文件：C:\app\Administrator\product\11.2.0\client_1\network\admin\listener.ora

# listener.ora Network Configuration File: C:\app\Administrator\product\11.2.0\client_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = REPORTSERVER01.ninestar.local)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
    )
  )

ADR_BASE_LISTENER = C:\app\Administrator