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背景

  • 我有一个包含控制台项目和 MVC4 Webapp 的解决方案。
  • 两者都引用 Oracle.ManagedDataAccess（托管 ODP.NET 数据访问提供程序）。参考是同一个文件。
  • 两者都没有引用 Oracle.ManagedDataAccess DTC。
  • 在 VS 配置管理器中，平台被列为所有配置选项的“任何 CPU”。
  • 两者的平台目标都是“任何 CPU”

问题

控制台应用程序执行得非常好。

当我尝试使用 MVC4 应用程序时，我看到：

Could not load file or assembly 'Oracle.ManagedDataAccessDTC' or one of its dependencies. An attempt was made to load a program with an incorrect format.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.BadImageFormatException: Could not load file or assembly 'Oracle.ManagedDataAccessDTC' or one of its dependencies. An attempt was made to load a program with an incorrect format.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Assembly Load Trace: The following information can be helpful to determine why the assembly 'Oracle.ManagedDataAccessDTC' could not be loaded.

    === Pre-bind state information ===
    LOG: User = [Redacted]\killesj1
    LOG: DisplayName = Oracle.ManagedDataAccessDTC
     (Partial)
    WRN: Partial binding information was supplied for an assembly:
    WRN: Assembly Name: Oracle.ManagedDataAccessDTC | Domain ID: 13
    WRN: A partial bind occurs when only part of the assembly display name is provided.
    WRN: This might result in the binder loading an incorrect assembly.
    WRN: It is recommended to provide a fully specified textual identity for the assembly,
    WRN: that consists of the simple name, version, culture, and public key token.
    WRN: See whitepaper http://go.microsoft.com/fwlink/?LinkId=109270 for more information and common solutions to this issue.
    LOG: Appbase = file:///C:/Users/killesj1/Repositories/PEApps/src/app/PEApps.Web/
    LOG: Initial PrivatePath = C:\Users\killesj1\Repositories\PEApps\src\app\PEApps.Web\bin
    Calling assembly : (Unknown).
    ===
    LOG: This bind starts in default load context.
    LOG: Using application configuration file: C:\Users\killesj1\Repositories\PEApps\src\app\PEApps.Web\web.config
    LOG: Using host configuration file: C:\Users\killesj1\Documents\IISExpress\config\aspnet.config
    LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config.
    LOG: Policy not being applied to reference at this time (private, custom, partial, or location-based assembly bind).
    LOG: Attempting download of new URL file:///C:/Users/killesj1/AppData/Local/Temp/Temporary ASP.NET Files/root/e17fc384/1ed8df51/Oracle.ManagedDataAccessDTC.DLL.
    LOG: Attempting download of new URL file:///C:/Users/killesj1/AppData/Local/Temp/Temporary ASP.NET Files/root/e17fc384/1ed8df51/Oracle.ManagedDataAccessDTC/Oracle.ManagedDataAccessDTC.DLL.
    LOG: Attempting download of new URL file:///C:/Users/killesj1/Repositories/PEApps/src/app/PEApps.Web/bin/Oracle.ManagedDataAccessDTC.DLL.
    ERR: Failed to complete setup of assembly (hr = 0x8007000b). Probing terminated.

我应该注意，我知道这是 Oracle.ManagedDataAccess DLL 的 32 位和 64 位版本之间的位问题。

但是，为什么针对相同 DLL 并使用相同设置编译的两个项目在工作方面会产生不同的结果？

到目前为止，我已经尝试...

  • 从 IIS Express 切换到 Cassini 只是为了好玩……同样的问题
  • 试图使控制台应用程序以同样的方式失败......到目前为止它没有。
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1 回答 1

8

根据您的 PrivatePath (C:\Users\killesj1\Repositories\PEApps\src\app\PEApps.Web\bin) 以及随后在该私有路径中对 Oracle.ManagedDataAccessDTC.DLL 的绑定尝试，您拥有 ODP DTC 的副本应用程序的“bin”目录中的程序集。虽然您没有在此处显示，但输出的 Stack Trace 部分应该显示对 LoadAllAssembliesFromAppDomainBinDirectory 的调用。该方法将尝试加载应用程序的“bin”目录中的所有 .dll 文件。在您的情况下，您在 ODP DTC 程序集的位数和执行过程方面存在不匹配（您已经注意到您知道此类问题）。

您在控制台应用程序中看不到此问题的原因是，此类应用程序不会调用 LoadAllAssembliesFromAppDomainBinDirectory 方法（或类似方法）来“预加载”程序集。

至于 ODP DTC 程序集是如何进入应用程序的 bin 目录的，也许您无意中包含了对它的引用并将“Copy Local”设置为“True”。或者您可能将 ODP DTC 程序集文件添加到项目中并将“复制到输出目录”设置为“真”。该文件也有可能被手动复制到目录中。换句话说，文件如何在目录中结束有多种可能性。

于 2013-02-25T01:02:33.043 回答