Asp.net mvc 错误：无法加载文件或程序集'；Oracle.ManagedDataAccessDTC'；或者它的一个依赖项 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）。该引用指向同一个文件 都不引用Oracle.ManagedDataAccess DTC 在VS Configuration Manager中，对于所有配置选项，平台都列为“任意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.

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

然而，为什么针对同一DLL并使用相同设置编译的两个项目在工作方面会有不同的结果

到目前为止，我已经试过。。。

• 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

根据您的私有路径（C:\Users\killesj1\Repositories\PEApps\src\app\PEApps.Web\bin）和该私有路径中Oracle.ManagedDataAccessDTC.DLL的后续绑定尝试，您在应用程序的“bin”目录中有一份ODP DTC程序集的副本。虽然这里没有显示，但输出的堆栈跟踪部分应该显示对LoadAllAssembliesFromAppDomainBindDirectory的调用。该方法将尝试加载应用程序“bin”目录中的所有.dll文件。在您的情况下，ODP DTC程序集和执行过程的位不匹配（您已经注意到，您知道这类问题）

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，可能是您无意中包含了对它的引用，并将“Copy Local”设置为“True”。或者您将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“True”。也可能是手动将文件复制到目录中。换句话说，关于文件如何在目录中结束，存在多种可能性