Win32 ini配置文件的读写

   ini配置文件的固定格式都是

[BACK]

BACKSET=3//这种格式方便存储数据，成为一种通用的数据，

这里总结下对ini文件的读写

往[BACK]中的BACKSET键中写值，以int为例

test_ini.WriteInt(L"BACK",L"BACKSET",countbk)，test _ini是一个ini文件的读写类，下面是Writeint函数的实现

BOOL CIniFile::WriteInt(LPCTSTR lpSection, LPCTSTR lpKey, int nValue) const
{
TCHAR szValue[DEF_PROFILE_NUM_LEN + 1] = _T("");
_stprintf(szValue, _T("%d"), nValue);
return WriteString(lpSection, lpKey, szValue);
}

BOOL CIniFile::WriteString(LPCTSTR lpSection, LPCTSTR lpKey, LPCTSTR lpValue) const
{
if (lpSection == NULL || lpKey == NULL)
return FALSE;
return CeWritePrivateProfileString(lpSection, lpKey, lpValue == NULL ? _T("") : lpValue, m_pszPathName);
}

而最关键的就是CeWritePrivateProfileString(lpSection, lpKey, lpValue == NULL ? _T("") : lpValue, m_pszPathName);函数的实现，说个大概思想吧

打开你所需要的写入的文件，寻找‘[’字符和']'字符。存储中间的字符串和”BACK“比较，找到相等的再找“BACKSET”键值，修改等号后面的数据，具体代码网上有

封装的很好了。

ini文件读取

test_ini.GetInt(L"BACK",L"BACKSET", 0);

int CIniFile::GetInt(LPCTSTR lpSection, LPCTSTR lpKey, int nDefault) const
{
TCHAR sz[DEF_PROFILE_NUM_LEN + 1] = _T("");
GetString(lpSection, lpKey, sz, DEF_PROFILE_NUM_LEN);
return *sz == _T('\0') ? nDefault : int(_tcstoul(sz, NULL, 10));
}

DWORD CIniFile::GetString(LPCTSTR lpSection, LPCTSTR lpKey, LPTSTR lpBuffer, DWORD dwBufSize, LPCTSTR lpDefault) const
{
if (lpBuffer != NULL)
*lpBuffer = _T('\0');


LPTSTR psz = __GetStringDynamic(lpSection, lpKey, lpDefault);
DWORD dwLen = _tcslen(psz);


if (lpBuffer != NULL)
{
_tcsncpy(lpBuffer, psz, dwBufSize);
dwLen = min(dwLen, dwBufSize);
}


delete [] psz;
return dwLen;
}

LPTSTR CIniFile::__GetStringDynamic(LPCTSTR lpSection, LPCTSTR lpKey, LPCTSTR lpDefault) const
{
TCHAR* psz = NULL;
if (lpSection == NULL || lpKey == NULL)
{
// Invalid section or key name, just return the default string
if (lpDefault == NULL)
{
// Empty string
psz = new TCHAR[1];
*psz = _T('\0');
}
else
{
psz = new TCHAR[_tcslen(lpDefault) + 1];
_tcscpy(psz, lpDefault);
}


return psz;
}


// Keep enlarging the buffer size until being certain on that the string we
// retrieved was original(not truncated).
DWORD dwLen = DEF_PROFILE_THRESHOLD;
psz = new TCHAR[dwLen + 1];
DWORD dwCopied = CeGetPrivateProfileString(lpSection, lpKey, lpDefault == NULL ? _T("") : lpDefault, psz, dwLen, m_pszPathName);
while (dwCopied + 1 >= dwLen)
{
dwLen += DEF_PROFILE_THRESHOLD;
delete [] psz;
psz = new TCHAR[dwLen + 1];
dwCopied = CeGetPrivateProfileString(lpSection, lpKey, lpDefault == NULL ? _T("") : lpDefault, psz, dwLen, m_pszPathName);
}


return psz; // !!! Requires the caller to free this memory !!!
}

添加了IniFile头文件后，调用过程就比较简单了

CStdString 也可以写了

FILE *stream;
stream = _wfopen(GPSPATH, _T("w+"));


if(stream == NULL)
return;
else
{
CIniFile IniFile;
IniFile.SetPathName(GPSPATH);
printf("MoveFolder::tmpPath = %ls\n",tmpPath);


IniFile.WriteString(L"MAP", L"MapPath", (LPCTSTR)tmpPath);
}

读取CStdString

BOOL bRet = FALSE;
FILE *stream;
stream = _wfopen(GPSPATH, _T("r"));


if(stream == NULL)
bRet = FALSE;
else
{
CIniFile IniFile;
IniFile.SetPathName(GPSPATH);
TCHAR str[MAX_PATH+1] = _T("");
IniFile.GetString(L"MAP",L"MapPath", str, MAX_PATH);
}

注意定义的时候一定要将MAX_PATH+1.