多字节转UTF-8

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void CDlgPatientList::ConvertGBKToUtf8(CString& amp, CString str_multi)
{
//CString str_utf8;

int len = MultiByteToWideChar(CP_ACP, 0, (LPCTSTR)str_multi, -1, NULL, 0);wchar_t * wszUtf8 = new wchar_t[len + 1];memset(wszUtf8, 0, len * 2 + 2);MultiByteToWideChar(CP_ACP, 0, (LPCTSTR)str_multi, -1, wszUtf8, len);len = WideCharToMultiByte(CP_UTF8, 0, wszUtf8, -1, NULL, 0, NULL, NULL);char *szUtf8 = new char[len + 1];memset(szUtf8, 0, len + 1);WideCharToMultiByte(CP_UTF8, 0, wszUtf8, -1, szUtf8, len, NULL, NULL);amp = szUtf8;delete[] szUtf8;delete[] wszUtf8;//return str_utf8;

}
void CDlgPatientList::utf8ToMulti(CString& str_GBK,CString strutf)
{

int len = MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strutf, -1, NULL, 0);wchar_t * wszMulti = new wchar_t[len + 1];memset(wszMulti, 0, len * 2 + 2);MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strutf, -1, wszMulti, len);len = WideCharToMultiByte(CP_ACP, 0, wszMulti, -1, NULL, 0, NULL, NULL);char *szMulti = new char[len + 1];memset(szMulti, 0, len + 1);WideCharToMultiByte(CP_ACP, 0, wszMulti, -1, szMulti, len, NULL, NULL);str_GBK = szMulti;delete[] wszMulti;delete[] szMulti;

}

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