C++/CLI 字符串转换

发布于 2024-11-10 05:54:34 字数 777 浏览 3 评论 0原文

我发现这段非常好的代码将字符串转换为 System:String^ ，如下所示：

System::String^ rtn = gcnew String(move.c_str());  // 'move' here is the string

我将 rtn 传递回 C# 程序。不管怎样，在这段代码所在的函数内部，我传入了一个System::String^。我还找到了一些使用以下代码将 System:String^ 转换为字符串的代码：

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。

然而，这似乎比使用 gcnew 进行其他转换需要更多的工作。所以，最后我的问题是，是否有什么东西可以使用与 gcnew 方式类似的方式将 System::String^ 转换为字符串？

原文

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

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);

Now I can use 'ch' as a string.

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?

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

最美的太阳 2024-11-17 05:54:34

使用 VC++ 的封送库：C++ 封送概述

#include <msclr/marshal_cppstd.h>

// given System::String^ mstr
std::string nstr = msclr::interop::marshal_as<std::string>(mstr);

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);

回复收藏 0 原文

若能看破又如何 2024-11-17 05:54:34

这可能很有用：

wchar_t *str = "Hi StackOverflow"; //native
String^ mstr= Marshal::PtrToStringAnsi((IntPtr)str); // native to safe managed
wchar_t* A=( wchar_t* )Marshal::StringToHGlobalAnsi(mstr).ToPointer(); // return back to native

不要忘记使用命名空间 System::Runtime::InteropServices;

this could be useful:

wchar_t *str = "Hi StackOverflow"; //native
String^ mstr= Marshal::PtrToStringAnsi((IntPtr)str); // native to safe managed
wchar_t* A=( wchar_t* )Marshal::StringToHGlobalAnsi(mstr).ToPointer(); // return back to native

don't forget using namespace System::Runtime::InteropServices;

回复收藏 0 原文

~没有更多了~