问题描述
我发现这个很好的代码，将字符串转换为 System：String ^ 如：
I found this really nice piece of code that converts a string to a System:String^ as in:
System::String^ rtn = gcnew String(move.c_str()); // 'move' here is the string
我将rtn传递回C＃程序。无论如何，在这个代码存在的函数内部，我传递一个 System :: String ^ 。我还发现一些代码使用以下代码将 System：String ^ 转换为字符串：
I'm passing rtn back to a C# program. Anyways, inside the function where this code exists, I'm passing in a System::String^. I also found some code to convert a System:String^ to a string using the following code:
pin_ptr<const wchar_t> wch = PtrToStringChars(cmd); // 'cmd' here is the System:String
size_t convertedChars = 0;
size_t sizeInBytes = ((cmd->Length + 1) * 2);
errno_t err = 0;
char *ch = (char *)malloc(sizeInBytes);
err = wcstombs_s(&convertedChars,ch, sizeInBytes,wch, sizeInBytes);
现在我可以使用ch作为字符串。
Now I can use 'ch' as a string.
然而，这似乎比使用 gcnew 转换另一种方式更多的工作。所以，最后我的问题是，有什么东西，会将一个 System :: String ^ 转换为字符串使用类似的方式与gcnew方式？
This, however, seems to be alot more work than converting the other way using the gcnew. So, at last my question is, is there something out there that will convert a System::String^ to string using a similar fashion as with the gcnew way?
推荐答案
使用VC ++的编组库：
Use VC++'s marshaling library: Overview of Marshaling in C++
#include <msclr/marshal_cppstd.h>
// given System::String^ mstr
std::string nstr = msclr::interop::marshal_as<std::string>(mstr);
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