C++读取INI配置文件类实例详解

/*=================================================================== 文件名:CIniFile类定义文件= 主要功能:可以读取.修改变量数值,可以设置新的组,新的变量====================================================================*/#ifndef _CINIFILE_H_#define _CINIFILE_H_#include <afxtempl.h>//用户接口说明:在成员函数SetVarStr和SetVarInt函数中,当iType等于零,则如果用户制定的参数在ini文件中不存在,//则就写入新的变量.当iType不等于零,则如果用户制定的参数在ini文件中不存在,就不写入新的变量，而是直接返回FALSE;class CIniFile{public: CIniFile(); virtual ~CIniFile();private: CIniFile(const CIniFile &); CIniFile & operator = (const CIniFile &);public: //创建函数 BOOL Create(const CString &strFileName); //得到变量整数型数值 BOOL GetVarInt(const CString &,const CString & ,int &); //得到变量字符串型数值 BOOL GetVarStr(const CString &,const CString & ,CString & ); //重新设置变量整数型数值 BOOL SetVarInt(const CString &,const CString & ,const int &,const int iType = 1); //重新设置变量字符串型数值 BOOL SetVarStr(const CString &,const CString &, const CString &,const int iType = 1);private: BOOL GetVar(const CString &,const CString &,CString &); BOOL SetVar(const CString &,const CString &,const CString &,const int iType = 1); int SearchLine(const CString &,const CString &);private: CArray FileContainer; BOOL bFileExsit; CStdioFile stfFile; CString strInIFileName;};#endifCIniFile.cpp文件内容： #include <afxtempl.h>#include "CIniFile.h"CIniFile::CIniFile():bFileExsit(FALSE){}CIniFile::~CIniFile(){if(bFileExsit){if(stfFile.Open(strInIFileName,CFile::modeCreate | CFile::modeWrite) && FileContainer.GetSize() > 0){CString strParam;for(int i = 0; i< FileContainer.GetSize();i++){strParam = FileContainer[i];// stfFile.WriteString(strParam);stfFile.WriteString(strParam+_T("/n"));}}stfFile.Close();}if(FileContainer.GetSize() > 0){FileContainer.RemoveAll();}}BOOL CIniFile::Create(const CString & strFileName){bFileExsit = FALSE;strInIFileName = strFileName;if(!stfFile.Open(strFileName,CFile::modeRead)){return bFileExsit;}CString strFileLine;while(bFileExsit = stfFile.ReadString(strFileLine)){if(bFileExsit == FALSE)return bFileExsit;FileContainer.Add(strFileLine);}stfFile.Close();bFileExsit = TRUE;return bFileExsit;}BOOL CIniFile::GetVar(const CString & strSection,const CString & strVarName,CString &strReturnValue){if(bFileExsit == FALSE || FileContainer.GetSize() < 0)return bFileExsit;int iLine = SearchLine(strSection,strVarName);if(iLine > 0){CString strParam = FileContainer[iLine -1];strReturnValue = strParam.Mid(strParam.Find(_T("=")) + 1);return TRUE;}return FALSE;}BOOL CIniFile::GetVarStr(const CString & strSection,const CString & strVarName,CString &strReturnValue){return(GetVar(strSection,strVarName,strReturnValue));}BOOL CIniFile::GetVarInt(const CString & strSection,const CString & strVarName,int & iValue){CString strReturnVar;if(GetVar(strSection,strVarName,strReturnVar)){strReturnVar.TrimLeft();int iLen = strReturnVar.GetLength();iValue = _tstoi(strReturnVar.GetBuffer(iLen));return TRUE;}return TRUE;}BOOL CIniFile::SetVar(const CString & strSection,const CString & strVarName,const CString & strVar,const int iType){if(bFileExsit == FALSE )return bFileExsit;if(FileContainer.GetSize() == 0){FileContainer.Add(_T("[") + strSection + _T("]"));FileContainer.Add(strVarName + _T("=") + strVar);return TRUE;}int i = 0;int iFileLines = (int)FileContainer.GetSize();//for(pInterator;pInterator != FileContainer.end();++pInterator)//{while(i< iFileLines){CString strValue = FileContainer.GetAt(i++);strValue.TrimLeft();if((strValue.Find(_T("[")) >=0) && (strValue.Find(strSection) >=0)){ while(i < iFileLines){CString strSectionList = FileContainer[i++];strSectionList.TrimLeft();if(strSectionList.Find(_T("//")) >=0)//找到注释行continue;if(strSectionList.Find(strVarName)>=0)//找到{CString strParam = strVarName + "=" + strVar;//FileContainer.SetAt(i-1,strParam);FileContainer[i-1] = strParam;return TRUE;}if(strSectionList.Find(_T("["),0)>=0)//在原来文件的SECTION中,没有相应的变量需要添加而且,这种情况下,下边还有别的section{//处理流程是这样的,首先把当前的数值依次向后移动,然后在当前位置加入新出现的数值if(iType !=0)return FALSE;CString strParam;FileContainer.Add(strParam);int iPre = (int)(FileContainer.GetSize()-1);while(iPre >= i){CString strBehind = FileContainer[iPre -1];FileContainer[iPre] = strBehind;iPre --;}strParam = strVarName + _T("=") + strVar;FileContainer.SetAt(i-1,strParam);return TRUE;}if(i == iFileLines && iType == 0){FileContainer.Add(strVarName + _T("=") + strVar);return TRUE;}}}}if(iType == 0){FileContainer.Add(_T("[") + strSection + _T("]"));FileContainer.Add(strVarName + _T("=") + strVar);}return TRUE;}BOOL CIniFile::SetVarStr(const CString & strSection,const CString & strVarName,const CString & strValue,const int iType){return SetVar(strSection,strVarName,strValue,iType);}BOOL CIniFile::SetVarInt(const CString & strSection,const CString & strVarName,const int & iValue,const int iType){CString strVar;strVar.Format(_T("%d"),iValue);return (SetVar(strSection,strVarName,strVar,iType));}int CIniFile::SearchLine(const CString & strSection,const CString & strVarName){if(FileContainer.GetSize() > 0){int i = 0;int iFileLines = (int)FileContainer.GetSize();while(i< iFileLines){CString strValue = FileContainer[i++];strValue.TrimLeft();if(strValue.Find(_T("[")) >=0 && strValue.Find(strSection,1)>=0){ while(i < iFileLines){CString strSectionList = FileContainer[i++];strSectionList.TrimLeft();if(strSectionList.Find(_T("//")) >=0)//找到注释行continue;if(strSectionList.Find(strVarName)>=0)//找到{return i;}if(strSectionList.Find(_T("["),0) >= 0)//另外一个段落出现,寻找失败{return -2;}}}}}return -1;}