Question

我无法使用Oracle.ManagedDataAccess.dll从Powershell连接到Oracle数据库。

我在Technet上关注了this教程，最后得到了这段代码：

add-type -path "C:\oracle\product\12.1.0\client_1\ODP.NET\managed\common\Oracle.ManagedDataAccess.dll"
$username = "XXXX"
$password = "XXXX"
$data_source = "(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=XXXX)(PORT=XXXX))(CONNECT_DATA = (SERVER=dedicated)(SERVICE_NAME=XXXX)))"
$connection_string = "User Id=$username;Password=$password;Data Source=$data_source"

try{
    $con = New-Object Oracle.ManagedDataAccess.Client.OracleConnection($connection_string)

    $con.Open()
} catch {
    Write-Error (“Can’t open connection: {0}`n{1}” -f `
        $con.ConnectionString, $_.Exception.ToString())
} finally{
    if ($con.State -eq ‘Open’) { $con.close() }
}

不幸的是我收到了这个错误：

C:\Users\XXXX\Desktop\oracle_test.ps1 : Can’t open connection: User Id=XXXX;Password=XXXX;Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=XXXX)(PORT=XXXX))(CONNECT_DATA = 
(SERVER=dedicated)(SERVICE_NAME=XXXX)))
System.Management.Automation.MethodInvocationException: Exception calling "Open" with "0" argument(s): "The type initializer for 'Oracle.ManagedDataAccess.Types.TimeStamp' threw an exception." ---> 
System.TypeInitializationException: The type initializer for 'Oracle.ManagedDataAccess.Types.TimeStamp' threw an exception. ---> System.Runtime.Serialization.SerializationException: Unable to find assembly 
'Oracle.ManagedDataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=XXXX'.
   at OracleInternal.Common.OracleTimeZone.GetInstance()
   at Oracle.ManagedDataAccess.Types.TimeStamp..cctor()
   --- End of inner exception stack trace ---
   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 CallSite.Target(Closure , CallSite , Object )
   --- End of inner exception stack trace ---
   at System.Management.Automation.ExceptionHandlingOps.CheckActionPreference(FunctionContext funcContext, Exception exception)
   at System.Management.Automation.Interpreter.ActionCallInstruction`2.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
    + CategoryInfo          : NotSpecified: (:) [Write-Error], WriteErrorException
    + FullyQualifiedErrorId : Microsoft.PowerShell.Commands.WriteErrorException,oracle_test.ps1

我已检查过连接字符串是否正确（适用于tnsping）
用户名和密码也是正确的
我更换了任何不应透露 XXXX
数据库版本为： Oracle Database 12c版本12.1.0.1.0
32位和64位Powershell实例的错误相同
在第一次运行之前，Oracle.ManagedDataAccess.dll没有加载，运行后它会一直加载，直到我关闭那个shell

不幸的是，我既不是Oracle也不是Powershell专家（我更喜欢MySQL和Python），因此我非常感谢您的任何想法和/或见解。

Answer 1

我不确定这在技术上是否是一个解决方案 - 我将其更多地归类为解决方法，但它对我有用。

在做了一些研究后，我找到了Oracle.ManagedDataAccess.dll的合适替代方案。我找到了.Net Framework的System.Data.OracleClient类。（它需要一个已安装的Oracle客户端，幸运的是该机器）

以下是对我有用的解决方案概要：

add-type -AssemblyName System.Data.OracleClient

$username = "XXXX"
$password = "XXXX"
$data_source = "XXXX"
$connection_string = "User Id=$username;Password=$password;Data Source=$data_source"

$statement = "select level, level + 1 as Test from dual CONNECT BY LEVEL <= 10"

try{
    $con = New-Object System.Data.OracleClient.OracleConnection($connection_string)

    $con.Open()

    $cmd = $con.CreateCommand()
    $cmd.CommandText = $statement

    $result = $cmd.ExecuteReader()
    # Do something with the results...

} catch {
    Write-Error (“Database Exception: {0}`n{1}” -f `
        $con.ConnectionString, $_.Exception.ToString())
} finally{
    if ($con.State -eq ‘Open’) { $con.close() }
}

Answer 2

这是我的（Powershell，但您可以适应 C#）代码，用于通过 ODP.NET 托管数据访问来执行此操作......我使用 Powershell Add-Type 直接加载，但在 C# 中将是使用/引用...

创建一个连接，使用连接构建器类来确保生成的连接字符串完全符合要求。当然，您可以简化，但这是自我记录的：

function New - OracleConnection { <
  #
  .SYNOPSIS# generate a well - formed connection string with individual properties
  Create and open a new Oracle connection using optional connectionstring argument

    .DESCRIPTION
  Create and open a new Oracle connection using optional connectionstring argument

    .EXAMPLE
  New - OracleConnection
  New - OracleConnect - connectionString "My well-formed Oracle connections string"

    .NOTES
  Connection is opened here by
  default# > #Add - Type - Path ".\Oracle.ManagedDataAccess.dll" [OutputType([Oracle.ManagedDataAccess.Client.OracleConnection])]
  Param(
    [Parameter(Mandatory = $false)]
    [string] $theConnectionString, [Parameter(Mandatory = $false)]
    [string] $openOnCreate = "1"#
    means true - open the connection...
  )[Oracle.ManagedDataAccess.Client.OracleConnection] $con = New - Object - TypeName Oracle.ManagedDataAccess.Client.OracleConnection;
  if ([string]::IsNullOrEmpty($theConnectionString)) {#
    $dataSource = "*********:1521/******;"

    $conStringBuilder = New - Object Oracle.ManagedDataAccess.Client.OracleConnectionStringBuilder;
    $conStringBuilder["Data Source"] = $dataSource;
    $conStringBuilder["User ID"] = "*******";
    $conStringBuilder["Password"] = "*******";
    $conStringBuilder["Persist Security Info"] = $True;
    $conStringBuilder["Connection Lifetime"] = 180;
    $conStringBuilder["Connection Timeout"] = 10;
    $conStringBuilder["Pooling"] = $true;
    $conStringBuilder["Min Pool Size"] = 10;
    $conStringBuilder["Max Pool Size"] = 20;
    $conStringBuilder["Incr Pool Size"] = 5;
    $conStringBuilder["Decr Pool Size"] = 2;
    $conStringBuilder["Statement Cache Size"] = 200;
    $conStringBuilder["Statement Cache Purge"] = $false;#
    default

    $con.ConnectionString = $conStringBuilder.ConnectionString;
  } else {
    $con.ConnectionString = $theConnectionString;
  }

  if (Get - IsTrue - yesNoArg $openOnCreate) {
    if (-not(Get - ConnectionStateIsOpen($con))) {#
      attempt open, ignore error
      if already open.State is normally open after successful create
      try {
        $con.Open();
      } catch {
        $null;
      }
    }
  }

  Write - Output - NoEnumerate $con;

}

建立连接：

$con = New - OracleConnection;

根据需要打开/关闭（默认为打开...）

... ... if ($con.State - ne[System.Data.ConnectionState]::Open) { $con.Open();# 没有我所知道的论据...... }

使用它然后关闭/处理...

    $sql = "SELECT * FROM YOUR_TABLE t WHERE t.SOMETHING = :the_parm";    
        [Oracle.ManagedDataAccess.Client.OracleCommand]$cmd = New-Object -TypeName Oracle.ManagedDataAccess.Client.OracleCommand;    
        $cmd.Connection = Get-OracleConnection;
        $cmd.CommandText = $sql;
        $cmd.BindByName = $true;
        $dbType = ([Oracle.ManagedDataAccess.Client.OracleDbType]::VarChar2);
       
        $cmd.Parameters.Add(( New-Param -name "the_parm" -type $dbType -size 15  )).Value = $the_criteria_value  ;
        Write-Output -NoEnumerate ($cmd.ExecuteScalar());
        $cmd.Connection.Close();
        $cmd.Dispose();

Answer 3

我有完全相同的问题，我从ODAC版本12.2.0.1.0切换到版本11.2.0.3，它就像打开连接和读取数据的魅力一样。希望这可以帮助。谢谢， SK

Answer 4

这很可能是oracle 12.2.x的问题
我必须将以下行添加到数据库服务器上的sqlnet.ora文件中，以允许来自较早的oracle客户端的连接： SQLNET.ALLOWED_LOGON_VERSION_CLIENT = 8 SQLNET.ALLOWED_LOGON_VERSION_SERVER = 8

一旦添加，我就可以使用oracle 10g和11g客户端登录

Answer 5

使用server：port / service语法。

$dataSource="server.network:1522/service1.x.y.z"

Powershell与Oracle数据库的连接

5 个答案: