c# - ODP.NET 连接异常

Question

首先我想说我对 Oracle 数据库一点都不熟悉，所以我的措辞可能不正确，我对某些概念的理解可能是错误的......无论如何，我正在尝试使用 ODP.NET 连接到 Oracle 11g 数据库，每次它都会给我这个异常:

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 bGetForApp, String affinityInstanceName, 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:

调用自:

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:我也在尝试在没有 tnsname.ora 文件的情况下进行连接。这是在数据库所在的同一台服务器上运行的 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建的):

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;

有什么想法吗？

Answer 1

这个人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 文件的 NAMES.DIRECTORY_PATH 中删除 LDAP。此文件位于您的客户端主目录中(此路径可在 HLM/SOFTWARE/ORACLE 下的注册表项之一中找到)。所以文件的内容来自

SQLNET.AUTHENTICATION_SERVICES= (none)

NAMES.DIRECTORY_PATH= (LDAP, TNSNAMES, EZCONNECT)

到

SQLNET.AUTHENTICATION_SERVICES= (none)

NAMES.DIRECTORY_PATH= (EZCONNECT, TNSNAMES)

现在可以了!我不知道为什么它在我的开发机器上运行(可能是因为它没有安装 Oracle)。

希望对其他人有帮助!