如何在c ++中调用c#方法? [英] How do you call a c# method in c++?
问题描述
这里和在这里他们说说做什么,但我似乎无法找到我的c#项目在c ++。
here and here they do talk about what to do, but i seem to be unable to find my c# project in c++.
我已经添加了c#项目作为c ++项目的引用,但每当我尝试使用我需要的方法,它不能找到命名空间。我已经添加它通过右键单击c + +项目并去'参考'然后添加了c#项目与添加新的参考。两个项目都在同一个解决方案中。
I have added the c# project as a reference in the c++ project but whenever i try to use the method i need, it can't find the namespace. i have added it by right clicking the c++ project and going for 'reference' then added the c# project with add new reference. both projects are in the same solution.
在下面的代码excamples我给了完整的c#代码(除了uses)和c ++代码的一部分其中我试图调用c#方法从)。我还更改了一些命名空间更通用,不包含敏感信息。
In the below code excamples i have given the full c# code (except for usings) and a part of the c++ code (the method where i am trying to call the c# method from). I have also changed some of the namespacing to be more generic and contain no sensitive information.
c#代码如下。
namespace Company.Pins.Bank.Decryption
{
public class Decrypt
{
[DllImport("decryptsn.dll", CallingConvention = CallingConvention.Cdecl)]
public static extern IntPtr decryptsn(byte[] InpData);
//__declspec(dllimport) char* decryptsn(char* InpData);
public static String Decryption(string param2)
{
byte[] InpData = new byte[255];
InpData = StrToByteArray(param2);
return Marshal.PtrToStringAnsi(decryptsn(InpData));
}
public static byte[] StrToByteArray(string str)
{
System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
return encoding.GetBytes(str);
}
}
}
C ++代码
CPReSInterfaceApp theApp;
extern "C" DllExport BOOL WINAPI UserInstruction(
HWND hWnd, HINSTANCE hInst, double* lpNumeric,
TCHAR* lpAlpha1, TCHAR* lpAlpha2)
{
AFX_MANAGE_STATE(AfxGetStaticModuleState());
if (lpNumeric == NULL || lpAlpha1 == NULL || lpAlpha2 == NULL)
return FALSE;
ReconcileUHParameter(lpNumeric, lpAlpha1, lpAlpha2);
int iCommand = (int)lpNumeric[0];
lpNumeric[0] = 6;
lpAlpha2 = Company.Pins.Bank.Decryption.Decrypt.Decryption("123456");
return TRUE;
}
推荐答案
a href =http://msdn.microsoft.com/en-us/library/yab9swk4%28v=vs.80%29.aspx =nofollow>#using directive to the code 。例如,如果你的C#dll命名为 Decrypt.dll
,请将其添加到C ++编译器的顶部:
You need to add a #using directive to the code. For example, if your C# dll were named Decrypt.dll
, add this to the top of your C++ compiland:
#using "Decrypt.dll"
请确保调用受管方法的C ++代码也使用 / clr
编译器选项编译为managed。
You also need to make sure the C++ code that calls a managed method is also compiled as managed using the /clr
compiler option.
此外,我相信您需要使用 ::
作为命名空间分隔符,而不是。
。
Also, I believe you need to use ::
as a namespace separator, rather than .
.
lpAlpha2 = Company::Pins::Bank::Decryption::Decrypt::Decryption("123456");
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