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1、Unicode编码下CString转为char*
<span style="font-size:18px;">#include <afx.h> int _tmain(int argc, _TCHAR* argv[]) { CString cstr = _T("test测试"); //获取宽字节字符的大小,大小是按字节计算的 int len = WideCharToMultiByte(CP_ACP,0,cstr,cstr.GetLength(),NULL,0,NULL,NULL); //为多字节字符数组申请空间,数组大小为按字节计算的宽字节字节大小 char * pbuffer = new char[len+1]; //以字节为单位 //宽字节编码转换成多字节编码 WideCharToMultiByte(CP_ACP,0,cstr,cstr.GetLength(),pbuffer,len,NULL,NULL); pbuffer[len] = '\0'; if (pbuffer) { delete [] pbuffer; pbuffer = NULL; } return 0; }</span>
方法二:使用函数:T2A、W2A
<span style="font-size:18px;">#include <afxpriv.h> int _tmain(int argc, _TCHAR* argv[]) { CString cstr = _T("test测试"); //声明标识符 USES_CONVERSION; char *pbuffer = T2A(cstr); char *pbuf = W2A(cstr); return 0; }</span>2、Unicode下char *转换为CString
<span style="font-size:18px;">#include <afx.h> int _tmain(int argc, _TCHAR* argv[]) { char * pchar = "test测试"; int charLen = strlen(pchar);//计算char *数组大小,以字节为单位,一个汉字占两个字节 int len = MultiByteToWideChar(CP_ACP,0,pchar,charLen,NULL,0);//计算多字节字符的大小,按字符计算。 TCHAR *buf = new TCHAR[len + 1];//为宽字节字符数组申请空间,数组大小为按字节计算的多字节字符大小 MultiByteToWideChar(CP_ACP,0,pchar,charLen,buf,len);//多字节编码转换成宽字节编码 buf[len] = '\0'; //将TCHAR数组转换为CString CString pWideChar; pWideChar.Append(buf); if(buf) { delete [] buf; buf = NULL; } return 0; }</span>
<span style="font-size:18px;">#include <afx.h> int _tmain(int argc, _TCHAR* argv[]) { char * pchar = "test测试"; USES_CONVERSION; CString cstr = A2T(pchar); CString cstr1 = A2W(pchar); return 0; }</span>
<span style="font-size:18px;">#include <afx.h> int _tmain(int argc, _TCHAR* argv[]) { CString cstr = _T("test测试"); CString cstr1 = "test测试"; return 0; }</span>
3、将char*转化为wchar_t*
<span style="font-size:18px;">#include <afx.h> wchar_t* AnsiToUnicode(const char* szStr) { int nLen = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, NULL, 0 ); if (nLen == 0) return NULL; wchar_t* pResult = new wchar_t[nLen]; MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, pResult, nLen ); return pResult; }</span>
4、将wchar_t*转化为char*
#include <afx.h> char* UnicodeToAnsi(const wchar_t* szStr) { int nLen = WideCharToMultiByte( CP_ACP, 0, szStr, -1, NULL, 0, NULL, NULL ); if (nLen == 0) return NULL; char* pResult = new char[nLen]; WideCharToMultiByte( CP_ACP, 0, szStr, -1, pResult, nLen, NULL, NULL ); return pResult; }
5、BSTR转换成char*
<span style="font-size:18px;">方法一,使用ConvertBSTRToString。例如: char* lpszText2 = _com_util::ConvertBSTRToString(bstrText); SysFreeString(bstrText); // 用完释放 delete[] lpszText2; 方法二,使用_bstr_t的赋值运算符重载。例如: _bstr_t b = bstrText; char* lpszText2 = b; </span>
方法一,使用SysAllocString等API函数。例如: BSTR bstrText = ::SysAllocString(L"test测试"); 方法二,使用COleVariant或_variant_t。例如: _variant_t strVar("test测试"); BSTR bstrText = strVar.bstrVal; 方法三,使用_bstr_t。例如: BSTR bstrText = _bstr_t("test测试"); 方法四,使用CComBSTR。例如: BSTR bstrText = CComBSTR("test测试"); 或 CComBSTR bstr("test测试"); BSTR bstrText = bstr.m_str; 方法五,使用ConvertStringToBSTR。例如: char* lpszText = "test测试"; BSTR bstrText = _com_util::ConvertStringToBSTR(lpszText);
通常是通过使用CStringT::AllocSysString来实现。例如: CString str("test测试"); BSTR bstrText = str.AllocSysString(); SysFreeString(bstrText); // 用完释放
8、BSTR转换成CString
<span style="font-size:14px;">BSTR bstrText = ::SysAllocString(L"test测试"); CStringA str; str.Empty(); str = bstrText; 或 CStringA str(bstrText);</span>
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