如何将'System :: String ^'转换为'TCHAR'？ [英] How do you convert a 'System::String ^' to 'TCHAR'?

问题描述

我提出了一个问题这里涉及C ++和C＃沟通。

i asked a question here involving C++ and C# communicating. The problem got solved but led to a new problem.

这会传回一个String（C＃）

this returns a String (C#)

return Marshal.PtrToStringAnsi(decryptsn(InpData));

这需要TCHAR *（C ++）

this expects a TCHAR* (C++)

lpAlpha2[0] = Company::Pins::Bank::Decryption::Decrypt::Decryption("123456");

我已经google了如何解决这个问题，但我不知道为什么String有胡萝卜（^）就可以了。最好将String的返回值更改为C ++接受的值吗？或者我需要在赋值之前做一个转换。

i've googled how to solve this problem, but i am not sure why the String has a carrot(^) on it. Would it be best to change the return from String to something else that C++ would accept? or would i need to do a convert before assigning the value?

推荐答案

这是一个真正的问题，如果你意味着如何将 String ^ 转换为 char * ，那么你使用以前使用的相同编组器，只返回：

That is a really rambling way to ask the question, but if you mean how to convert a String ^ to a char *, then you use the same marshaller you used before, only backwards:

char* unmanagedstring = (char *) Marshal::StringToHGlobalAnsi(managedstring).ToPointer();

编辑：不要忘记释放完成使用 Marshal :: FreeHGlobal 。

don't forget to release the memory allocated when you're done using Marshal::FreeHGlobal.

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