VB.NET无法连接到Oracle Server

Question

运行以下功能时，我收到以下错误消息。 catch表示打开连接的行（Me.OracleConn.Open（））。

我确保服务器存在于TNSNAMES.ora文件中。

Imports NetOracle = System.Data.OracleClient
...
Private Property OracleConn As NetOracle.OracleConnection
...
    Private Function Connect_To_Oracle() As Boolean
        Connect_To_Oracle = False

        Try

            'Me.OracleConn = New NetOracle.OracleConnection
            Me.OracleConn = New System.Data.OracleClient.OracleConnection
            Me.OracleConn.ConnectionString = "Data Source = (DESCRIPTION=" & _
                      "(ADDRESS_LIST=(ADDRESS = (PROTOCOL = TCP)(HOST = servername.net)(PORT = ####)))" & _
                      "(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME = risk)));" & _
                      "User Id=user_name;Password=password;"

            Me.OracleConn.Open()
            Connect_To_Oracle = True
        Catch ex As Exception
            MsgBox("Oracle Connection Error:" & ex.Message)
        End Try


    End Function

Answer 1

检查$ ORACLE_HOME的权限：阅读更多内容： http://oraclepoint.com/oralife/2010/08/19/oracle-odbc-connection-issue-of-system-exception-ocienvcreate-failed-with-return-code-1-on-windows-with-asp/

Answer 2

您是否尝试过使用没有TNSNames的ODP.Net？我发现它比在你的系统上使用txt文件更容易...

连接字符串看起来像这样：

Data Source=(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=MyHost)(PORT=MyPort)))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=MyOracleSID)));User Id=myUsername;Password=myPassword;

它与你在TNSNAMES上提供的信息基本相同，而是将连接信息放在web.config上。