Windows 編程中的字串（2）

標籤：

（1）windows寫日誌系統

 1 void writeDebugEventLog(TCHAR* pszMessage, WORD wType) 2 { 3     //#ifdef _DEBUG 4  5     HANDLE hEventSource = NULL; 6     const TCHAR* lpszStrings[2] = { NULL, NULL }; 7  8     hEventSource = RegisterEventSourceW(NULL, L"DeviceMonitorService"); 9     if (hEventSource)10     {11         lpszStrings[0] = _T("DeviceMonitorService");12         lpszStrings[1] = pszMessage;13 14         ReportEvent(hEventSource,  // Event log handle15             wType,                 // Event type16             0,                     // Event category17             0,                     // Event identifier18             NULL,                  // No security identifier19             2,                     // Size of lpszStrings array20             0,                     // No binary data21             lpszStrings,           // Array of strings22             NULL                   // No binary data23             );24 25         DeregisterEventSource(hEventSource);26     }27     //#else28     //#endif // DEBUG29 }

（2）將字串寫入數組

1 TCHAR szMessage[260];2 ZeroMemory(szMessage, ARRAYSIZE(szMessage));3 StringCchPrintf(szMessage, ARRAYSIZE(szMessage),4                 _T("[Win32Project1  ]monitorId  %s  ,   attached DisplayDevice.DeviceID : %s   IsLocalMonitor %d"), monitorId, aDisplayDevice.DeviceID, IsLocalMonitor);5 writeDebugEventLog(szMessage, EVENTLOG_ERROR_TYPE);

  註：

StringCchPrintf function (Strsafe.h)

 

Writes formatted data to the specified string. The size of the destination buffer is provided to the function to ensure that it does not write past the end of this buffer.

 

StringCchPrintf is a replacement for the following functions:

• sprintf, swprintf, _stprintf
• wsprintf
• wnsprintf
• _snprintf, _snwprintf, _sntprintf

sprintf (<stdio.h>)

 

 

(3)TCHAR與string轉換（std::string為char類型的字元集合）

1 string TCHAR2STRING(TCHAR* STR){2     int iLen = WideCharToMultiByte(CP_ACP, 0, STR, -1, NULL, 0, NULL, NULL);3     char* chRtn = new char[iLen*sizeof(char)];4     WideCharToMultiByte(CP_ACP, 0, STR, -1, chRtn, iLen, NULL, NULL);5     std::string str(chRtn);6     return str;7 }

註：

   string 

   Header: <string> ——c++ 標準庫標頭檔

   Namespace: std

   

string	A type that describes a specialization of the template class basic_string with elements of type char as a string.
wstring	A type that describes a specialization of the template class basic_string with elements of type wchar_t as a wstring.

 

 

 

 

 

 

char字串轉換成Unicode 字串

 1 LPWSTR pwszOut = NULL; 2 if (value != NULL) 3 { 4     //    // Double NULL Termination 5     int nOutputStrLen = MultiByteToWideChar(CP_ACP, 0, value, -1, NULL, 0);//擷取char字串的長度，包括空串的長度 6     pwszOut = new TCHAR[nOutputStrLen]; 7  8     memset(pwszOut, 0, nOutputStrLen); 9     MultiByteToWideChar(CP_ACP, 0, value, -1, pwszOut, nOutputStrLen);10 }

 

（4）各類資料結構 

 

     typedef _Null_terminated_ CONST WCHAR *LPCWSTR, *PCWSTR;

 

      typedef LPCWSTR PCTSTR, LPCTSTR;  ——winnt.h

 

 

 

（5）各類字串函數

      

 

　　strrchr, wcsrchr，_tcsrchr——

Header: stdio.h, string.h.

     Scan a string for the last occurrence of a character.

 

     example:  (_tcsrchr(cmd, _T(‘\\‘)))[1] = 0;

 

 

     lstrcat—— include Windows.h

　　Appends one string to another.

　　Warning  Do not use. Consider using  StringCchCat instead. See Security Considerations.       lstrcat(cmd, _T("***.exe"));       lstrcpy(id, buff); (6)其它函數    ZeroMemory macro—— (include Windows.h)memset  ——  #include <memory.h>  #include <stdio.h>

 

Visual Studio 6.0Sets buffers to a specified character.

void *memset( void *dest, int c, size_t count );

Routine	Required Header	Compatibility
memset	<memory.h> or <string.h>	ANSI, Win 95, Win NT

 

Windows 編程中的字串（2）