VS2012 Designer无法加载程序集

Question

There is a solution with a C# project referencing a managed C++ library which in turn references a native C++ library. The C# project contains BaseUserControl and ChildUserControl which extends it.

The problem is: if code from the native C++ is called (via the managed C++ library) in the constructor of BaseUserControl then ChildUserControl can't be veiwed in the designer view; nor can you add either of BaseUserControl or ChildUserControl to a Form. We get the following error:

Could not load file or assembly 'TestLibCPP, Version=1.0.4877.30347, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.

How can we fix this?

I have included a simple VS2012 solution which demonstrates the problem. This is a contrived example based on a problem we are having with a large codebase which has recently been converted from VS2005 to VS2012.

Thanks

Answer 1

如果您有源代码，请尝试使用configuraion（X86平台）重建解决方案，然后尝试使用设计器打开ChildUserControl。

Answer 2

问题可能是您的本机dll构建在32位配置之上，尝试在32位平台上构建项目

Answer 3

Try changing the GUITest platform target to x86. It is currently 'Any CPU'. You can do this regardless of if your on a 64 bit or 32 bit box. Be sure to review the plaforms in your configuration too (Debug, Release, ..)

Answer 4

The problem is exactly based on the X86 architecture of your C++ projects. Your WinForms Project references "Any CPU".

I've included a picture to show you where to change it (sry it's in german but you should find it from the position on the screen :)

1. Right-click your Winforms project and go to settings
2. Switch to tab Compile (guess thats the english name for it)
3. Change target platform to x86
4. Build and have fun ;)

EDIT:

I've just seen that the Bounty Question was regarding having everything setup to 64bit so to achieve that simply set the targets of the C++ dlls to x64 architecture.

1. Right click on any of the c++ DLLs and go to settings
2. in the upper area you will see a button called configuration-manager
3. in the newly opened window just set all C++ dlls to x64.
4. if its not available to select just click on the arrow and create a new x64 (not ARM) architecture for the second project disselect the "create new" checkbox and select the previously created one.