1、std::wstring 转 std::string
1 string WstringToString(const std::wstring wstr)
2 {
3 #if 1
4 std::string result;
5 int len = WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), NULL, 0, NULL, NULL);
6 if( len <= 0 )
7 return result;
8
9 char* buffer = new char[len + 1];
10 if(buffer == NULL )
11 return result;
12
13 WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), buffer, len, NULL, NULL);
14 buffer[len] = '\0';
15 result.append(buffer);
16 delete[] buffer;
17
18 return result;
19 #else
20 //unsigned len = (unsigned)str.size() * 4;
21 setlocale(LC_CTYPE, "");
22 //char *p = new char[len];
23 //wcstombs(p,str.c_str(),len);
24 //std::string str1(p);
25 //delete[] p;
26 //return str1;
27 #endif
28 }
2、std::string 转 std::wstring
1 wstring StringToWString(const string str)
2 {
3 //int num = MultiByteToWideChar(CP_UTF8, 0, str.c_str(), -1, NULL, 0);
4 //wchar_t *wide = new wchar_t[num];
5 //MultiByteToWideChar(CP_UTF8, 0, str.c_str(), -1, wide, num);
6 //std::wstring w_str(wide);
7 //delete[] wide;
8 //return w_str;
9
10 wstring result;
11 //获取缓冲区大小，并申请空间，缓冲区大小按字符计算
12 int len = MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), NULL, 0);
13 TCHAR* buffer = new TCHAR[len + 1];
14 //多字节编码转换成宽字节编码
15 MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), buffer, len);
16 buffer[len] = '\0'; //添加字符串结尾
17 //删除缓冲区并返回值
18 result.append(buffer);
19 delete[] buffer;
20 return result;
21
22 }
