C++呼叫 c#生成的dll

jwwry發表於2024-06-28
C++C#

詳細見：Interoping .NET and C++ through COM - CodeProject，

個人理解：

1、C#生成的dll相當於com server

2、C++呼叫相當於com client

3、client 要訪問 server 的動態庫，需要進行assembly註冊，見：Registering Assemblies with COM - .NET Framework | Microsoft Learn。

4、註冊：管理員許可權C:\Windows\Microsoft.NET\Framework64\v4.0.30319>regasm D:\wjw\gitee\SoftwareLicense-master\Register\bin\Debug\Register.dll

5、註冊tlb：C:\Windows\Microsoft.NET\Framework64\v4.0.30319>regasm D:\wjw\gitee\SoftwareLicense-master\Register\bin\Debug\Register.dll /tlb:Register.tlb

6、dll的位置：

  • The global assembly cache (must be a strong-named assembly).C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools>gacutil /i D:\wjw\gitee\SoftwareLicense-master\Register\bin\Debug\Register.dll

  • In the application directory. Assemblies loaded from the application path are only accessible from that application.

  • Along an file path specified with the /codebase option to Regasm.exe.

7、將生成的tlb複製到c++專案當前資料夾

8、匯入c++：

#include<atlcomcli.h>
#import "Register.tlb"

9、呼叫：

CoInitialize(NULL);
myInterfacePtr dll(__uuidof(ComDll));
BSTR str = SysAllocString(L"");

bool b = dll->check("", &str);
char* p = _com_util::ConvertBSTRToString(str);
qInfo() << p;
SysFreeString(str);

以上程式碼，ComDll為com server 類，check函式在c#為out string.

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