C++ 如何从 wchar_t 转换为 LPSTR？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/8532855/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to convert from wchar_t to LPSTR?
提问by nidhal
How can I convert a string from wchar_tto LPSTR.
我怎么能转换为字符串，从wchar_t到LPSTR。
采纳答案by Frerich Raabe
A wchar_tstring is made of 16-bit units, a LPSTRis a pointer to a string of octets, defined like this:
一个wchar_t字符串由 16 位单元组成，aLPSTR是一个指向八位字节串的指针，定义如下：
typedef char* PSTR, *LPSTR;
What's important is that the LPSTR maybe null-terminated.
重要的是 LPSTR可以以空值结尾。
When translating from wchar_tto LPSTR, you have to decide on an encoding to use. Once you did that, you can use the WideCharToMultiBytefunction to perform the conversion.
当从 转换wchar_t为 时LPSTR，您必须决定要使用的编码。完成此操作后，您可以使用该WideCharToMultiByte函数执行转换。
For instance, here's how to translate a wide-character string into UTF8, using STL strings to simplify memory management:
例如，这里是如何将宽字符串转换为 UTF8，使用 STL 字符串来简化内存管理：
#include <windows.h>
#include <string>
#include <vector>
static string utf16ToUTF8( const wstring &s )
{
const int size = ::WideCharToMultiByte( CP_UTF8, 0, s.c_str(), -1, NULL, 0, 0, NULL );
vector<char> buf( size );
::WideCharToMultiByte( CP_UTF8, 0, s.c_str(), -1, &buf[0], size, 0, NULL );
return string( &buf[0] );
}
You could use this function to translate a wchar_t*to LPSTRlike this:
您可以使用此函数将 a 翻译wchar_t*成LPSTR这样：
const wchar_t *str = L"Hello, World!";
std::string utf8String = utf16ToUTF8( str );
LPSTR lpStr = utf8String.c_str();
回答by Ulterior
I use this
我用这个
wstring mywstr( somewstring );
string mycstr( mywstr.begin(), mywstr.end() );
then use it as mycstr.c_str()
然后将其用作 mycstr.c_str()
(edit, since i cannot comment) this is how i used this, and it works fine:
（编辑，因为我无法评论）这就是我使用它的方式，它工作正常：
#include <string>
std::wstring mywstr(ffd.cFileName);
std::string mycstr(mywstr.begin(), mywstr.end());
pRequest->Write(mycstr.c_str());
