failed to create c# object from CLI code

Question

I am trying to access a managed function from native code. I created a c++/cli dll in visual studio 2010 with CLR option. This is my c# code:

namespace ManagedNamespace { public class Managed { public void CSharpFunc() { . . . } } }

This is my c++\CLI code (the project refer to the c# project - and I compile this code to Wrapper.dll):

#ifdef __cplusplus extern "C" { #endif __declspec(dllexport) void CLIFunc(const std::string& a, const std::string& b, std::string& c) { System::String^ new_a = gcnew System::String(a.c_str()); //OK System::String^ new_b = gcnew System::String(b.c_str()); //OK Text::StringBuilder^ new_c = gcnew Text::StringBuilder(""); //OK ManagedNamespace::Managed^ m = gcnew ManagedNamespace::Managed(); //this line is the problematic line m->CSharpFunc(); }

I call this function from another dll and get EXCEPTION_EXECUTE_HANDLER when I create ManagedNamespace::Managed object. This is the code:

typedef void (WINAPI *CLIFuncPtr)(const std::string& a, const std::string& b, std::string& c); . . . HMODULE mod = LoadLibraryA("c:\\mydir\\Wrapper.dll"); if (mod!= NULL) { CLIFuncPtr FuncPtr = (CLIFuncPtr)GetProcAddress(mod, "CLIFunc"); if (FuncPtr != NULL) { FuncPtr (aa, bb, cc); } }

Appreciate any help, Thanks

Is this relevant? stackoverflow.com/questions/6628412/… Can you make the debugger break on all exceptions and see what's gone wrong? — doctorlove
– doctorlove, Commented Jul 17, 2013 at 8:52
exception: EEFileLoadException * _ptr64 at memory location 0x.... — pitz
– pitz, Commented Jul 17, 2013 at 10:27
The CLR has no hope of finding your C# assembly if you don't copy it in the same directory as the EXE. The backup plan is to register it in the GAC so it can always be found. — Hans Passant
– Hans Passant, Commented Jul 17, 2013 at 14:38

Matteo Umili · Accepted Answer · 2013-07-17 08:55:08Z

0

I think that LoadLibrary works only with unmanaged code

answered Jul 17, 2013 at 8:55

Matteo Umili

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