解決“The type initializer for'Oracle.DataAccess.Client.OracleConnection' threw an exception ”異常

問題：部署在安裝oracle client 11g，運行后出現如下問題：

*****************Exception Text*************** System.TypeInitializationException: The type initlializer for 'Oracle.DataAccess.Client.OracleConnection at Oracle.DataAccess.Client.OracleConnection..cctor() --- End of inner exception stack trace --- at Oracle.DataAccess.Client.OracleConnection..ctor(String connectionString) ...

從oracle 網站下載  ODAC1120320Xcopy_32bit ：

http://www.oracle.com/technetwork/database/windows/downloads/utilsoft-087491.html

Reference: Oracle.DataAccess.dll(ODAC1120320Xcopy_32bit\odp.net4\odp.net\bin\4\Oracle.DataAccess.dll)

復制如下dll 到你程序的bin目錄中:

• oci.dll (ODAC1120320Xcopy_32bit\instantclient_11_2\oci.dll)
• oraociei11.dll (ODAC1120320Xcopy_32bit\instantclient_11_2\oraociei11.dll)
• OraOps11w.dll (ODAC1120320Xcopy_32bit\odp.net4\bin\OraOps11w.dll)