VC的Ini文件读写类

Delphi用惯了，今天写族谱管理时发现VC居然没有ini文件操作的类（可能是我无知），只好自己动手。仿照Delphi的TIniFile写的，功能如下：

bool SectionExists(CString Section);
CString ReadString(CString Section, CString Ident, CString Default);
void WriteString(CString Section, CString Ident, CString Value);
int ReadInteger(CString Section, CString Ident, int Default);
void WriteInteger(CString Section, CString Ident, int Value);
void ReadSection(CString Section, CStringArray &Strings);
void ReadSections(CStringArray &Strings);
void ReadSectionValues(CString Section, CStringArray &Strings);
void EraseSection(CString Section);

头文件

// IniFile.h: interface for the CIniFiles class.
//
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_INIFILES_H__F09B5546_796F_44B3_95A5_E2F7D053732C__INCLUDED_)
#define AFX_INIFILES_H__F09B5546_796F_44B3_95A5_E2F7D053732C__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#define MAX_BUFFER_SIZE 2048;

class CIniFileException
{
public:
CIniFileException() {};
~CIniFileException() {};
};

class CIniFile
{
public:
CIniFile(CString FileName);
virtual ~CIniFile();
bool SectionExists(CString Section);
CString ReadString(CString Section, CString Ident, CString Default);
void WriteString(CString Section, CString Ident, CString Value);
int ReadInteger(CString Section, CString Ident, int Default);
void WriteInteger(CString Section, CString Ident, int Value);
void ReadSection(CString Section, CStringArray &Strings);
void ReadSections(CStringArray &Strings);
void ReadSectionValues(CString Section, CStringArray &Strings);
void EraseSection(CString Section);

protected:
CString m_strFileName;
};

#endif // !defined(AFX_INIFILES_H__F09B5546_796F_44B3_95A5_E2F7D053732C__INCLUDED_)

源文件

// IniFile.cpp: implementation of the CIniFiles class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "IniFile.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CIniFile::CIniFile(CString FileName)
{
m_strFileName = FileName;
}

CIniFile::~CIniFile()
{
}

bool CIniFile::SectionExists(CString Section)
{
CStringArray Strings;
ReadSection(Section, Strings);
return Strings.GetSize()>0;
}

CString CIniFile::ReadString(CString Section, CString Ident, CString Default)
{

int nSize = 0, nLen = nSize-2;
char *lpszReturnBuffer = 0;
while(nLen==nSize-2)
{
nSize+=MAX_BUFFER_SIZE;
if(lpszReturnBuffer) delete lpszReturnBuffer;
lpszReturnBuffer = new char[nSize];
nLen = GetPrivateProfileString(Section,Ident,Default,lpszReturnBuffer,//如果返回nSize-2
nSize,m_strFileName);	//则表示缓冲区长度不足，递增MAX_BUFFER_SIZE
}
return lpszReturnBuffer;
}

void CIniFile::WriteString(CString Section, CString Ident, CString Value)
{
if(WritePrivateProfileString(Section,Ident,Value,m_strFileName)==0)
throw CIniFileException();
}

int CIniFile::ReadInteger(CString Section, CString Ident, int Default)
{
CString strInt = ReadString(Section,Ident,"");
if (strInt.IsEmpty())
{
return Default;
}
else
{
return atoi(strInt);
}
}

void CIniFile::WriteInteger(CString Section, CString Ident, int Value)
{
char buffer[20];
itoa(Value,buffer,10);
WriteString(Section,Ident,buffer);
}

void CIniFile::ReadSection(CString Section, CStringArray &Strings)
{
Strings.RemoveAll();//清空字符串数组
int nSize = 0, nLen = nSize-2;
char *lpszReturnBuffer = 0;
while(nLen==nSize-2)
{
nSize+=MAX_BUFFER_SIZE;
if(lpszReturnBuffer) delete lpszReturnBuffer;
lpszReturnBuffer = new char[nSize];
nLen = GetPrivateProfileString(Section,NULL,NULL,lpszReturnBuffer,//如果返回nSize-2
nSize,m_strFileName);	//则表示缓冲区长度不足，递增MAX_BUFFER_SIZE
}
char *pName = new char[MAX_PATH];
char *pStart, *pEnd;
pStart = lpszReturnBuffer;
pEnd =0;
while(pStart!=pEnd)
{
pEnd = strchr(pStart,0);
nLen = pEnd-pStart;
if(nLen==0) break;
strncpy(pName,pStart,nLen);
pName[nLen] = 0;
Strings.Add(pName);
pStart = pEnd+1;
}
delete lpszReturnBuffer;
delete pName;
}

void CIniFile::ReadSections(CStringArray &Strings)
{
Strings.RemoveAll();//清空字符串数组
int nSize = 0, nLen = nSize-2;
char *lpszReturnBuffer = 0;
while(nLen==nSize-2)
{
nSize+=MAX_BUFFER_SIZE;
if(lpszReturnBuffer) delete lpszReturnBuffer;
lpszReturnBuffer = new char[nSize];
nLen = GetPrivateProfileSectionNames(lpszReturnBuffer,nSize,//如果返回nSize-2则表示
m_strFileName);	//缓冲区长度不足，递增MAX_BUFFER_SIZE
}
char *pName = new char[MAX_PATH];
char *pStart, *pEnd;
pStart = lpszReturnBuffer;
pEnd =0;
while(pStart!=pEnd)
{
pEnd = strchr(pStart,0);
nLen = pEnd-pStart;
if(nLen==0) break;
strncpy(pName,pStart,nLen);
pName[nLen] = 0;
Strings.Add(pName);
pStart = pEnd+1;
}
delete lpszReturnBuffer;
delete pName;
}

void CIniFile::EraseSection(CString Section)
{
if(WritePrivateProfileString(Section,NULL,NULL,m_strFileName)==0)
throw CIniFileException();
}

转自：http://ilue.bokee.com/2164221.html