连接Error:Oracle.DataAccess.Client.OracleException ORA-12170

Question

我花了好几个小时。我必须让这个.Net应用程序在XP系统上运行。似乎有人把一些文件搞乱了，所以conn.Open()在C#中导致了这个错误：

    Connection Error:Oracle.DataAccess.Client.OracleException ORA-12170: 
TNS:Connect timeout occurred at Oracle.DataAccess.Client.OracleException.HandleErrorHelper(Int32 errCode, OracleConnection 
conn, IntPtr opsErrCtx, OpoSqlValCtx* pOpoSqlValCtx, Object src, String procedure) at 
Oracle.DataAccess.Client.OracleException.HandleError(Int32 errCode, OracleConnection conn, 
IntPtr opsErrCtx, Object src) at Oracle.DataAccess.Client.OracleConnection.Open() at 
Service.connect(Int32 sql_choice, String databaseIdentifier, String authenticationKey) in 
c:\Documents ....

这是我的sqlnet.ora文件：

# sqlnet.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\sqlnet.ora

SQLNET.AUTHENTICATION_SERVICES= (NTS)

NAMES.DIRECTORY_PATH= (TNSNAMES, EZCONNECT)

SQLNET.INBOUND_CONNECT_TIMEOUT = 180
SQLNET.SEND_TIMEOUT = 180
SQLNET.RECV_TIMEOUT = 180

这是tnsnames.ora：

# tnsnames.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora
# Generated by Oracle configuration tools.

ORACLE2 =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = dell )(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = oracle2)
    )
  )

ORCL =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = dell )(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = orcl)
    )
  )

EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    )
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
    )
  )

这是listener.ora：

# listener.ora Network Configuration File: C:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = C:\oracle\product\10.2.0\db_1)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = dell  )(PORT = 1521))
    )
  )

我尝试将主机名更改为localhost，127.0.0.1，但这不起作用。另外，

• I可以执行来自SQL Plus的查询。
• 系统上没有防火墙，
• ，.Net应用程序和DB位于同一台机器上。

Answer 1

当确定数据库是使用similar SO question安装在Windows上时，就解决了这个问题。正如我在回答中所说的，如果您在Oracle的Windows框上使用DHCP，则需要安装Microsoft适配器。