I created a C++/CLI assembly that creates a wrapper around native C++ code. The resource compiles and the assembly loads fine into my C# project when I add it as a resource. I can access my objects and intellisense from within my application, but when attempting to build, it crashes with the exception:
BadImageFormat
Could not load file or assembly
'MyCLI, Version=1.0.3680.28432,
Culture=neutral, PublicKeyToken=null'
or one of its dependencies. An attempt
was made to load a program with an
incorrect format.
I load it into my form load event:
MyCLI.myCLI z;
... and when I compile, it crashes on this line in my main constructor in C#
Application.Run(new Form1());
Does anyone have an idea of what could be causing this exception?
Thanks
You are trying to run this code on a 64-bit operating system. Your C# code will get nicely compiled to 64-bit machine code. But you'll hit the wall when it tries to load a 32-bit C++/CLI assembly.
In the C# project, use Project + Properties, Application tab, Platform Target = x86. Creating a 64-bit version of your C++/CLI assembly is possible too, use Build + Configuration Manager. Using Platform Target is the better solution.
Related
code is here https://github.com/Layty/cppnetdll
I have check the cpp dll and c# all is on x86, my pc is x64 ,I have also use both cpp and C# with x64
but it still tell me like
Unhandled exception. System.BadImageFormatException: Could not load file or assembly 'DLLMYX86, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'. 试图加载格式不正确的程序。
File name: 'DLLMYX86, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' ---> System.BadImageFormatException: 试图加载格式不正确的程序。 (0x8007000B)
at MYNETX86.Program.Main(String[] args)
In .NET when you compile a managed assembly the compiler generate a intermediate code which is then compile at the fly by the JIT (just in time compiler) for the machine architecture where you are running your application.
A native (C++) dll is compiled for a specific architecture (could be x86 or x64) and the binary image file is specific for that architecture.
If you want to use a native dll from a .NET app you have to be sure that the JIT compiles the code for the same architecture the native dll was made for. The only way to be sure that everything is coherent is to compile the .NET assembly for that specific architecture. In Visual Studio this is possible switching the target architecture from Any CPU to the same of the native dll.
Your native dll is referenced as a regular managed dll. This will not work. Your options are
Rewrite the functionality in managed code
Use C++/CLI to produce a managed dll
Use PInvoke to call a native dll
I would prefer option 1 if possible. Interacting with unmanaged code is kind of a pain in the ass for anything except the most trivial signatures.
Your C# project targets .Net Core 3.1, so you need update your C++ project to target the same version.
In Project Properties > Advanced > C++/CLI Properties.
Set Common Language Runtime Support to .Net Core Runtime Support (/clr:netcore), then click Apply.
Set .Net Target Framework Version to netcoreapp3.1 or .NET Core 3.1.
I have solve this problem. I remove the pch.h and the pch.cpp and dllmain , then every thing run well .
But I dont know why ? it is just pre combile , and I have clean obj dir and clean project befor .
I have update my git code . just fix https://github.com/Layty/cppnetdll/blob/master/DLLMYX86/DLLMYX86/dllmain.cpp
or del this file.
I have make other both include cpp and C# .
othrs if have problem can download it. it works well
now I can new cpp object in c#
I have a VSTO PowerPoint Add-in project complied with default mode. Which works fine. Now I have to use a reference NeedleSeekAPI.dll, but it seems it was complied with x64 mode.
So the problem is if I choose Any CPU I will have error:
Could not load file or assembly 'NeedleSeekAPI' or one of its dependencies. An attempt was made to load a program with an incorrect format.
And if I choose X64 I have another error:
Could not load file or assembly 'PPTSearch, Version=1.0.0.0, Culture=neutral' or one of its dependencies. The given assembly name or codebase was invalid. (Exception from HRESULT: 0x80131047)
I tried to convert my VSTO Add-in project into 64-bit follow this article:
http://blogs.msdn.com/b/vsto/archive/2010/04/09/deploying-com-add-ins-for-64-bit-office-using-visual-studio-saaid-khan-for-nathan-halstead.aspx
but it is not working as well, I still get the same error. (or do I have to revised my VSTO PPT addin to a Shared-addin?)
I use VS2010 with .NET framework4.
Do you have any suggestion?
You can try spawning a different process to handle calls to 'NeedleSeekAPI.dll' which is compiled in a different mode.
You need to handle inter-process communication, if NeedleSeekAPI.dll is editable you may pass parameters to it when spawning the process.
I just switched from C++ to C# and I am a bit confused about referencing DLLs.
I have a third party DLL and a simple testing application that uses some of its methods. When I compile the project, everything goes well, but when I run the compiled app on another computer, I've got an error that says that the DLL is missing even though the DLL is in the app's working directory. What's even more strange is that I have access to the source code of another app that is dependent on an older version of this DLL and this app works well.
I've gone through the code and all the solution settings without finding anything really different.
Can you tell me how to reference a .dll from a working dir (Visual Studio 2010)?
Below is the exception:
System.IO.FileNotFoundException was unhandled
Message=Could not load file or assembly 'TIS.Imaging.ICImagingControl32, Version=3.2.4.1146, Culture=neutral, PublicKeyToken=257805929e8b7928' or one of its dependencies. The system cannot find the file specified.
Source=ICtestapp
FileName=TIS.Imaging.ICImagingControl32, Version=3.2.4.1146, Culture=neutral, PublicKeyToken=257805929e8b7928
FusionLog=WRN: Assembly binding logging is turned OFF.
To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1.
Note: There is some performance penalty associated with assembly bind failure logging.
To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].
StackTrace:
at ICtestapp.Form1.InitializeComponent()
at ICtestapp.Form1..ctor()
at ICtestapp.Program.Main()
InnerException:
Here's a good blog post from Suzanne Cook from the .net team on debugging .net loader issues.
http://blogs.msdn.com/b/suzcook/archive/2003/05/29/57120.aspx
and here's the details on how it loads:
http://msdn.microsoft.com/en-us/library/yx7xezcf(v=vs.71).aspx
You have to add the dll as reference in your project references, once you added the library in the reference, when you compile the program the dll will be automatically copied to the compilation output folder unless otherwise specified in the reference properties ...
Then if you copy all items that you will find in the compilation output folder in the new location in the other PC, you should not have any problems.
Check also that the .NET framework installed on the other machine is at least as the same level of the project target ..
This also happens when you copy the debug executables over to another machine. Try compiling in release and moving over.
I have a COM DLL produced in C# using VS2010, using it from VS2910, it works fine, but when I try to use the DLL from Delphi 7, having imported the .tlb file, some of the functions work fine, but one seems to generate the following error.
Could not load file or assembly 'InnovateCV, Version=1.0.0.0, Culture=neutral, PublicKeyToken=c06107b7da48b1da' or one of its dependencies. The system cannot find the file specified. unfortunatly it have no idea what is failing to load, the InnovateCV is my DLL, and is loaded, getting more information from the exception the Data value is 'System.Collections.ListDictionaryInternal'. Unfortunally my COM DLL is calling a third party .NET DLL, which is where the exception is being thrown. Is there any way to find what it is failing to load.
I've tried using Depends.exe, and there are no DLL's mising that it can see.
Any help would be appreciated.
Solved the problem, it was a clash of DLL names, between the Delphi App, and the .NET App, so the Delphi App, was failing to find the required function in the DLL, I also had to put all the DLL's in the same directory as the Delphi App. And its now working. Thanks for the Help.
I imported LuaInterface into a console project, referenced it, and wrote a small test script. When i run it, i get this:
Could not load file or assembly 'LuaInterface, Version=2.0.0.16708, Culture=neutral, PublicKeyToken=null' or one of its dependencies. An attempt was made to load a program with an incorrect format.
Forgive me for being a newbie or something, but i can't figure out what it means. What am i supposed to do?
Are you running on a 64-bit operating system?
If you are then you'll need to either get an x64 build of LuaInterface or set the platform target of your console project to x86.
You can read up on the platform target option here:
http://visualstudiohacks.com/articles/visual-studio-net-platform-target-explained/