Unicode字符集下CString/tchar*与char *转换 （解决中文乱码等）

Unicode环境下宽字符------->窄字符的转换

定义：TCHAR m_szIp[MAX_IP_LEN];   我们要将TCHANR类型数组（宽字符型）转换为char*pBuffer类型（窄字符型）： 

方法一：

    

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1. int nNum=WideCharToMultiByte(CP_ACP,0,m_szIp,-1,0,0,NULL,NULL);  
2.     char* pBuffer=new char[nNum+1];  
3.     WideCharToMultiByte(CP_ACP,0,m_szIp,-1,pBuffer,nNum,NULL,NULL);  

int nNum=WideCharToMultiByte(CP_ACP,0,m_szIp,-1,0,0,NULL,NULL);char* pBuffer=new char[nNum+1];WideCharToMultiByte(CP_ACP,0,m_szIp,-1,pBuffer,nNum,NULL,NULL);

方法二：T2A    、W2A

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1. USES_CONVERSION;  
2.   char *pBuffer = T2A(m_szIp);  

 USES_CONVERSION;  char *pBuffer = T2A(m_szIp);

相反，同样情况下，窄字符--------->宽字符转换：

方法一：MultiByteToWideChar

方法二：A2T、A2W

下面是对方法一的两个函数的封装：

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1. char *WideCharToAnsi(wchar_t *pWideChar)  
2. {  
3.     if (!pWideChar) return NULL;  
4.     char *pszBuf = NULL;  
5.     int needBytes = WideCharToMultiByte(CP_ACP, 0, pWideChar, -1, NULL, 0, NULL, NULL);  
6.     if (needBytes > 0){  
7.         pszBuf = new char[needBytes+1];  
8.         ZeroMemory(pszBuf, (needBytes+1)*sizeof(char));  
9.         WideCharToMultiByte(CP_ACP, 0, pWideChar, -1, pszBuf, needBytes, NULL, NULL);  
10.     }  
11.   
12.     return pszBuf;  
13. }  
14.   
15.   
16. wchar_t *AnsiCharToWide(char *pChar)  
17. {  
18.     if (!pChar) return NULL;  
19.     wchar_t *pszBuf = NULL;  
20.     int needWChar = MultiByteToWideChar(CP_ACP, 0, pChar, -1, NULL, 0);  
21.     if (needWChar > 0){  
22.         pszBuf = new wchar_t[needWChar+1];  
23.         ZeroMemory(pszBuf, (needWChar+1)*sizeof(wchar_t));  
24.         MultiByteToWideChar(CP_ACP, 0, pChar, -1, pszBuf, needWChar);  
25.     }  
26.   
27.     return pszBuf;  
28. }  

char *WideCharToAnsi(wchar_t *pWideChar){if (!pWideChar) return NULL;char *pszBuf = NULL;int needBytes = WideCharToMultiByte(CP_ACP, 0, pWideChar, -1, NULL, 0, NULL, NULL);if (needBytes > 0){pszBuf = new char[needBytes+1];ZeroMemory(pszBuf, (needBytes+1)*sizeof(char));WideCharToMultiByte(CP_ACP, 0, pWideChar, -1, pszBuf, needBytes, NULL, NULL);}return pszBuf;}wchar_t *AnsiCharToWide(char *pChar){if (!pChar) return NULL;wchar_t *pszBuf = NULL;int needWChar = MultiByteToWideChar(CP_ACP, 0, pChar, -1, NULL, 0);if (needWChar > 0){pszBuf = new wchar_t[needWChar+1];ZeroMemory(pszBuf, (needWChar+1)*sizeof(wchar_t));MultiByteToWideChar(CP_ACP, 0, pChar, -1, pszBuf, needWChar);}return pszBuf;}