c# – ODP.NET连接异常

首先,我想说我对Oracle数据库一点也不熟悉,所以我的话可能选择不当,而且我对某些概念的理解可能是错误的……
无论如何,我试图使用ODP.NET连接到Oracle 11g数据库,每次它给我这个例外：

System.TypeInitializationException occurred
HResult=-2146233036
Message=The type initializer for 'OracleInternal.Network.AddressResolution' threw an exception.
Source=Kiwi.ServiceBase
TypeName=OracleInternal.Network.AddressResolution
StackTrace:
    at OracleInternal.ConnectionPool.PoolManager`3.CreateNewPR(Int32 reqCount,Boolean bForPoolPopulation,ConnectionString csWithDiffOrNewPwd,String instanceName)

    at OracleInternal.ConnectionPool.PoolManager`3.Get(ConnectionString csWithDiffOrNewPwd,Boolean bGetForApp,String affinityInstanceName,Boolean bForceMatch)

    at OracleInternal.ConnectionPool.OraclePoolManager.Get(ConnectionString csWithNewPassword,Boolean bForceMatch)

    at OracleInternal.ConnectionPool.OracleConnectiondispenser`3.Get(ConnectionString cs,PM conPM,ConnectionString pmCS,securestring securedPassword,securestring securedProxyPassword)

    at Oracle.ManagedDataAccess.Client.OracleConnection.open()

    at Kiwi.DataAccess.OracleDataService.get_DbConnection() in c:\Projects\Kiwi-Beta7-0\Kiwiweb\src\Common\applicationservices\DataService\OracleDataService.cs:line 28

    InnerException: System.TypeInitializationException
        HResult=-2146233036
        Message=The type initializer for 'OracleInternal.Network.LDAP' threw an exception.
        Source=Oracle.ManagedDataAccess
        TypeName=OracleInternal.Network.LDAP
        StackTrace:
            at OracleInternal.Network.LDAP..ctor()
            at OracleInternal.Network.AddressResolution..cctor()
        InnerException: System.NullReferenceException
            HResult=-2147467261
            Message=Object reference not set to an instance of an object.
            Source=Oracle.ManagedDataAccess
            StackTrace:
                at OracleInternal.Network.LDAP._LDAP(Hashtable dsMap)
                at OracleInternal.Network.LDAP..cctor()
            InnerException:

来自：

private System.Data.IDbConnection _dbConnection;
public override IDbConnection DbConnection
{
    get
    {
        if (_dbConnection.State == ConnectionState.Closed)
            _dbConnection.open();        // Crash from HERE
        return _dbConnection;
    }
}

编辑附加信息：我也尝试连接没有tnsname.ora文件.这是在数据库所在的同一服务器上运行的Windows服务.

我尝试了以下连接字符串,第一个在调试中工作(并且是由应用程序构造的连接字符串)：

Data Source=demosyr20140329:1521/demosyr;User ID=SEI;password=manager;Pooling = False;

Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)       (HOST=DEMOSYR20140329)(PORT=1521))(CONNECT_DATA=(SID=DEMOSYR)));User Id=system;Password=manager;

Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=DEMOSYR20140329)(PORT=1521)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=DEMOSYR)));

Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=DEMOSYR20140329)(PORT=1521))(CONNECT_DATA=(SID=DEMOSYR)));  User Id=system;Password=manager;

User Id=system;Password=manager;Data Source=oracle

Data Source=system/manager@//DEMOSYR20140329:1521/DEMOSYR;

任何的想法 ？

解决方法

这家伙帮我解决了我的问题
https://pravsdatums.wordpress.com/2013/12/16/ocac-12c-and-visual-studio-developer-tools/#comment-1

解决方案是从sql.ora文件中的NAMES.DIRECTORY_PATH中删除LDAP.此文件位于客户端主目录中(此路径可在HLM / SOFTWARE / ORACLE下的注册表中的某个密钥上找到).所以文件的内容来自

sqlNET.AUTHENTICATION_SERVICES= (none)

NAMES.DIRECTORY_PATH= (LDAP,TNSNAMES,EZCONNECT)

至

sqlNET.AUTHENTICATION_SERVICES= (none)

NAMES.DIRECTORY_PATH= (EZCONNECT,TNSNAMES)

现在它有效！我不知道为什么它在我的开发机器上运行(可能因为没有安装Oracle).

希望它可以帮助别人！

原文地址：https://www.jb51.cc/csharp/100958.html