我有一个托管 C# 测试 DLL,我想从我的非托管 C++ 代码中调用它的函数。
问题是我找不到一个示例来说明如何从我的 c++ 代码中调用任意函数,我只能得到ICLRRuntimeHost::ExecuteInDefaultAppDomain
工作,但这个函数确实使用了预定义的方法签名。
问题
我能够ShowMsg
从我的 C# DLL 中执行该函数,但我不知道如何调用具有其他签名的方法而不是int(int)
. 有人可以帮我吗?
C++ 代码
// interface definitions of functions from c# dll
typedef int (*TestCallbackPtr)(std::wstring info, int value1, double value2);
typedef int (*TestFunctionPtr)(std::wstring string1, int int1, double double1, TestCallbackPtr callback);
// path of my c# dll
auto pathDll = L"..."
void RunTest()
{
ICLRMetaHost* clrMetaHost = NULL;
ICLRRuntimeInfo* clrRuntimeInfo = NULL;
ICLRRuntimeHost* clrRuntimeHost = NULL;
// loading the data above is excluded for simplicity!
// ...
// -------------
// Test 1: run ShowMsg => WORKING
// -------------
DWORD pReturnValue;
HRESULT result = clrRuntimeHost->ExecuteInDefaultAppDomain(pathDll, L"Test.Managed", L"ShowMsg", L"Hello from C++", &pReturnValue);
// -------------
// Test 2: run TestFunction
// -------------
TestCallbackPtr callback = [](std::wstring info, int value1, double value2) {
return 21;
};
TestFunctionPtr function = NULL;
// how to continue? how can I execute the function here and assign my local function pointer so that following will work:
// (*function)(L"Test", 45, 1.23, callback);
}
C# 代码
namespace Test
{
public class Managed
{
public static int ShowMsg(string msg)
{
MessageBox.Show(msg);
return 0;
}
public delegate int TestCallback([MarshalAs(UnmanagedType.LPWStr)] string info, int value1, double value2);
public static int TestFunction(
[MarshalAs(UnmanagedType.LPWStr)] string string1,
int int1,
double double1,
TestCallback callback)
{
string info = $"string1 = {string1} | int1 = {int1} | double1 = {double1}";
int returnValue = callback(info, 5, 10.34);
return returnValue;
}
}
}