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我正在使用 LDAP 解析连接到 Oracle 数据库。

这对于常规查询现在很好用，我可以打开一个连接并对其执行命令。

不幸的是，它不适用于在调用System.DirectoryServices.Protocols.DirectoryOperationException: The object does not exist时出现异常的更改通知查询。ExecuteNonQuery

C:\Program Files\Oracle\sqlnet.ora

NAMES.DEFAULT_DOMAIN = mydomain.com
NAMES.DIRECTORY_PATH = (LDAP)

C:\Program Files\Oracle\ldap.ora

DIRECTORY_SERVERS=(oidgv0.mydomain.com:3060:3131,oidgv1.mydomain.com:3060:3131)
DEFAULT_ADMIN_CONTEXT="dc=mydomain,dc=com"
DIRECTORY_SERVER_TYPE=OID

网络配置

<!-- ODP.net configuration -->
<oracle.manageddataaccess.client>
  <version number="*">
    <settings>
      <setting name="ldap_admin" value="C:\Program Files\Oracle" />
      <setting name="NAMES.DIRECTORY_PATH" value="(LDAP)"/>
    </settings>
  </version>
</oracle.manageddataaccess.client>


<!-- Database connections configuration -->
<connectionStrings>
  <add name="MyDB" connectionString="Data Source=MyDB_Alias;User ID=..." />
</connectionStrings>

通知登记

string connectionString = ConfigurationManager.ConnectionStrings["MyDB"].
                          ConnectionString;

var connection = new OracleConnection(connectionString);
connection.Open(); // This works fine

OracleCommand command = connection.CreateCommand();
command.CommandText = "select * from my_table";

var dependency = new OracleDependency(
  command, isNotifiedOnce: false, timeout: 0, isPersistent: false);
dependency.QueryBasedNotification = false;
dependency.OnChange += OnChangeHandler;

command.ExecuteNonQuery(); // The exception is thrown during this call

这会引发以下异常：

Oracle.ManagedDataAccess.Client.OracleException (0x80004005): ORA-12154: TNS:could not resolve the connect identifier specified ---> OracleInternal.Network.NetworkException (0x00002F7A): ORA-12154: TNS:could not resolve the connect identifier specified
   at OracleInternal.Network.AddressResolution..ctor(String TNSAlias, String instanceName)
   at OracleInternal.Network.OracleCommunication.Listen(String tnsDescriptor, Boolean inAddr_Any)

跟踪（ips已被xs替换）

2015-04-30 15:11:02.017271 TID:1   (NET)      LDAP.Resolve(): query oidgv0.mydomain.com for cn=10,cn=OracleContext,dc=x,dc=x,dc=x:x
2015-04-30 15:11:02.075276 TID:1   (NET)      Exception during OracleInternal.Network.LDAP.Resolve : System.DirectoryServices.Protocols.DirectoryOperationException: The object does not exist.
   at System.DirectoryServices.Protocols.LdapConnection.ConstructResponse(Int32 messageId, LdapOperation operation, ResultAll resultType, TimeSpan requestTimeOut, Boolean exceptionOnTimeOut)
   at System.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request, TimeSpan requestTimeout)
   at System.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request)
   at OracleInternal.Network.LDAP.Resolve(String TNSname, ConnectionOption& CO, String IN)
2015-04-30 15:11:02.298299 TID:1   (NET)      LDAP.Resolve(): query oidgv1.mydomain.com for cn=10,cn=OracleContext,dc=x,dc=x,dc=x:x
2015-04-30 15:11:02.425311 TID:1   (NET)      Exception during OracleInternal.Network.LDAP.Resolve : System.DirectoryServices.Protocols.DirectoryOperationException: The object does not exist.
   at System.DirectoryServices.Protocols.LdapConnection.ConstructResponse(Int32 messageId, LdapOperation operation, ResultAll resultType, TimeSpan requestTimeOut, Boolean exceptionOnTimeOut)
   at System.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request, TimeSpan requestTimeout)
   at System.DirectoryServices.Protocols.LdapConnection.SendRequest(DirectoryRequest request)
   at OracleInternal.Network.LDAP.Resolve(String TNSname, ConnectionOption& CO, String IN)
2015-04-30 15:11:02.425311 TID:1   (NET)      LDAP.Resolve(): x.x.x.x:x is not valid for LDAP Naming Adapter.
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1 回答 1

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For those who might have the same issue, it seems like EZConnect is required to allow change notifications with managed ODP.net so the Web.Config file should contain the following line:

<setting name="NAMES.DIRECTORY_PATH" value="(LDAP, EZConnect)"/>
于 2015-05-01T07:50:50.113 回答