Question

我的计算机上安装了ODAC 12.1。源代码使用的是版本12.2（更新）。

在运行时我得到InvalidCastException：

System.InvalidCastException： [A] Oracle.DataAccess.Client.OracleCommand无法强制转换为 [B] Oracle.DataAccess.Client.OracleCommand。类型A源自 'Oracle.DataAccess，版本= 4.121.2.0，区域性=中性，位置“默认”上下文中的PublicKeyToken = 89b483f429c47342” 'C：\ WINDOWS \ Microsoft.Net \ assembly \ GAC_64 \ Oracle.DataAccess \ v4.0_4.121.2.0__89b483f429c47342 \ Oracle.DataAccess.dll'。类型B源自'Oracle.DataAccess，Version = 4.122.1.0，文化=中性，PublicKeyToken = 89b483f429c47342'在上下文中位置为“默认” 'C：\ code \ Windows Application \ bin \ Debug \ Oracle.DataAccess.dll”。

如何指定应用程序应使用哪个Oracle版本？

Answer 1

请查看以下内容：[A]Oracle.ManagedDataAccess.Client.OracleParameter cannot be cast to [B]Oracle.ManagedDataAccess.Client.OracleParameter

但是，我认为问题可能是其他原因。检查您的GAC，我的样子如下：

c:\Temp>gacutil /l | findstr /i Oracle.DataAccess, | findstr Version=4.12 | sort
  Oracle.DataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=AMD64
  Oracle.DataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=x86
  Policy.4.112.Oracle.DataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=AMD64
  Policy.4.112.Oracle.DataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=x86
  Policy.4.121.Oracle.DataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=AMD64
  Policy.4.121.Oracle.DataAccess, Version=4.121.2.0, Culture=neutral, PublicKeyToken=89b483f429c47342, processorArchitecture=x86

发布者政策文件Policy.4.121.Oracle.DataAccess.config是这个

<configuration>
   <runtime>
      <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
        <dependentAssembly>
          <assemblyIdentity name="Oracle.DataAccess" publicKeyToken="89B483F429C47342"/>
            <bindingRedirect oldVersion="4.121.0.0-4.121.2.0" newVersion="4.121.2.0"/>
        </dependentAssembly>
      </assemblyBinding>
   </runtime>
</configuration>

如果您有一个要求Oracle.DataAccess, Version=4.122.1.0的应用程序，则Windows不知道要从GAC加载哪个版本（因为它最多覆盖4.121.2.0），因此很可能它将加载您复制到的DLL。应用程序目录。然后您会遇到版本冲突。

解决方案1：

获取Oracle.DataAccess.dll的“旧”版本（甚至可以早于4.121.2.0，但必须为4.xxx）并将其复制到您的开发机器上-仅使用单个DLL，不要安装任何DLL。其他Oracle客户端。

请参考此旧DLL。发布者策略将自动重定向到您计算机上安装的版本-除非您强制使用特定版本，请参见How to load specific version of assembly from GAC

解决方案2：

上面我写了“发布者策略将自动重定向...”，但这意味着发布者策略已正确安装！

当我上次安装Oracle 12.2客户端时，Oracle.DataAccess没有放入GAC，也没有添加发布者策略。这似乎是Oracle Universal Installer中的错误。您可以使用此脚本手动添加它们，选择所需的版本和体系结构：

SETLOCAL

set Oracle_x64=c:\oracle\product\12.1\Client_x64\ODP.NET
set Oracle_x86=c:\oracle\product\12.1\Client_x86\ODP.NET

set OraProvCfg_x64=%Oracle_x64%\bin\4\OraProvCfg.exe
set OraProvCfg_x86=%Oracle_x86%\bin\4\OraProvCfg.exe


IF EXIST "%Oracle_x64%\managed\common\Oracle.ManagedDataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\managed\common\Oracle.ManagedDataAccess.dll
IF EXIST "%Oracle_x64%\managed\PublisherPolicy\4\Policy.4.121.Oracle.ManagedDataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\managed\PublisherPolicy\4\Policy.4.121.Oracle.ManagedDataAccess.dll
IF EXIST "%Oracle_x64%\managed\PublisherPolicy\4\Policy.4.122.Oracle.ManagedDataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\managed\PublisherPolicy\4\Policy.4.122.Oracle.ManagedDataAccess.dll

IF EXIST "%Oracle_x64%\bin\2.x\Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\bin\2.x\Oracle.DataAccess.dll
IF EXIST "%Oracle_x64%\PublisherPolicy\2.x\Policy.2.102.Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\PublisherPolicy\2.x\Policy.2.102.Oracle.DataAccess.dll
IF EXIST "%Oracle_x64%\PublisherPolicy\2.x\Policy.2.111.Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\PublisherPolicy\2.x\Policy.2.111.Oracle.DataAccess.dll
IF EXIST "%Oracle_x64%\PublisherPolicy\2.x\Policy.2.112.Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\PublisherPolicy\2.x\Policy.2.112.Oracle.DataAccess.dll
IF EXIST "%Oracle_x64%\PublisherPolicy\2.x\Policy.2.121.Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\PublisherPolicy\2.x\Policy.2.121.Oracle.DataAccess.dll
IF EXIST "%Oracle_x64%\PublisherPolicy\2.x\Policy.2.122.Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\PublisherPolicy\2.x\Policy.2.122.Oracle.DataAccess.dll

IF EXIST "%Oracle_x64%\bin\4\Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\bin\4\Oracle.DataAccess.dll
IF EXIST "%Oracle_x64%\PublisherPolicy\4\Policy.4.112.Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\PublisherPolicy\4\Policy.4.112.Oracle.DataAccess.dll
IF EXIST "%Oracle_x64%\PublisherPolicy\4\Policy.4.121.Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\PublisherPolicy\4\Policy.4.121.Oracle.DataAccess.dll
IF EXIST "%Oracle_x64%\PublisherPolicy\4\Policy.4.122.Oracle.DataAccess.dll" "%OraProvCfg_x64%" /action:gac /providerpath:%Oracle_x64%\PublisherPolicy\4\Policy.4.122.Oracle.DataAccess.dll

IF EXIST "%Oracle_x86%\bin\2.x\Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\bin\2.x\Oracle.DataAccess.dll
IF EXIST "%Oracle_x86%\PublisherPolicy\2.x\Policy.2.102.Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\PublisherPolicy\2.x\Policy.2.102.Oracle.DataAccess.dll
IF EXIST "%Oracle_x86%\PublisherPolicy\2.x\Policy.2.111.Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\PublisherPolicy\2.x\Policy.2.111.Oracle.DataAccess.dll
IF EXIST "%Oracle_x86%\PublisherPolicy\2.x\Policy.2.112.Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\PublisherPolicy\2.x\Policy.2.112.Oracle.DataAccess.dll
IF EXIST "%Oracle_x86%\PublisherPolicy\2.x\Policy.2.121.Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\PublisherPolicy\2.x\Policy.2.121.Oracle.DataAccess.dll
IF EXIST "%Oracle_x86%\PublisherPolicy\2.x\Policy.2.122.Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\PublisherPolicy\2.x\Policy.2.122.Oracle.DataAccess.dll

IF EXIST "%Oracle_x86%\bin\4\Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\bin\4\Oracle.DataAccess.dll
IF EXIST "%Oracle_x86%\PublisherPolicy\4\Policy.4.112.Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\PublisherPolicy\4\Policy.4.112.Oracle.DataAccess.dll
IF EXIST "%Oracle_x86%\PublisherPolicy\4\Policy.4.121.Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\PublisherPolicy\4\Policy.4.121.Oracle.DataAccess.dll
IF EXIST "%Oracle_x86%\PublisherPolicy\4\Policy.4.122.Oracle.DataAccess.dll" "%OraProvCfg_x86%" /action:gac /providerpath:%Oracle_x86%\PublisherPolicy\4\Policy.4.122.Oracle.DataAccess.dll

当然，您也可以根据需要使用gacutil.exe。

具有两个不同版本的ODAC

1 个答案: