(转)VC++中使用XML

//****************************************
//必要的头文件
#import <msxml.dll>   //xml
using namespace MSXML;

//****************************************
class CXMLControl
{
//公有方法
public:
 _bstr_t GetNodeText(const char *URL = NULL);
 _bstr_t GetNodeAttribute(const char *URL, const char *attrib);
 _bstr_t GetNodeAttribute(const char *attrib);
 void LoadFile(const char  *file);
 CXMLControl();
 CXMLControl(const char *file);
 bool InsertNode2(const char *parent, const char *node, const char *value, int attribCount, ...);
 IXMLDOMDocumentPtr GetDocument();
 bool DeleteNode(const char *URL);
 bool InsertNode(const char *parent, const char *node, const char *value);
 void SaveXML(const char *file);
 virtual ~CXMLControl();
//公有成员
public:
 bool m_isLoadFile;
 _bstr_t m_CurrentNodeURL;
//私有方法
private:
 void InitClass(); //初始化类
//私有成员
protected:
 MSXML::IXMLDOMDocumentPtr m_pXMLDocument;
 _bstr_t m_fileName;
};

class CXMLException// : CException
{
public:
 _bstr_t Message;
public:
 CXMLException(_bstr_t msg)
 {
  this->Message = msg;
 }
};
#endif // !defined(AFX_XMLCONTROL_H__4CB4499C_D589_4386_8279_9932F20E8209__INCLUDED_)
//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

//实现文件

// XMLControl.cpp: implementation of the CXMLControl class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"

#include "XMLControl.h"

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

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

CXMLControl::CXMLControl()
{
 //初始化类
 this->InitClass();
}

CXMLControl::CXMLControl(const char *file)
{
 this->InitClass();
 this->LoadFile(file);
}

//加载文件
void CXMLControl::LoadFile(const char *file)
{
 this->m_fileName = (_bstr_t)file;

 try
 {
  //加载文件
  this->m_pXMLDocument->load(_variant_t(file));
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"加载文件/"" + (_bstr_t)file + (_bstr_t)"/"失败!";
  throw CXMLException(msg);
 }

 this->m_isLoadFile = true;
}

CXMLControl::~CXMLControl()
{
 this->m_pXMLDocument->Release();
}

//初始化类
void CXMLControl::InitClass()
{
 //初始化COM接口
 HRESULT hr_ConInitialize;
 hr_ConInitialize = CoInitialize(NULL);
 if(FAILED(hr_ConInitialize))
 {
  throw CXMLException("初始化COM接口失败!"); //初始化失败
 }

 //初始化Document
 HRESULT hr_Document;
 hr_Document = this->m_pXMLDocument.CreateInstance(__uuidof(DOMDocument));
 if(FAILED(hr_Document))
 {
  throw CXMLException("初始化XMLDocument失败!"); //初始化失败
 }
 this->m_pXMLDocument->async = VARIANT_FALSE;

 //初始化其它成员
 this->m_isLoadFile = false;
}

_bstr_t CXMLControl::GetNodeText(const char *URL)
{
 _bstr_t restr;

 MSXML::IXMLDOMNodePtr node;
 try
 {
  //获取当前节点
  if(URL != NULL)
   this->m_CurrentNodeURL = (_bstr_t)URL;
  node = this->m_pXMLDocument->selectSingleNode(this->m_CurrentNodeURL);
  restr = node->text;
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"找不到节点/"" + (_bstr_t)URL + (_bstr_t)"/"!";
  throw CXMLException(msg);
 }

 return restr;
}

//获取属性
_bstr_t CXMLControl::GetNodeAttribute(const char *attrib)
{
 return GetNodeAttribute(this->m_CurrentNodeURL, attrib);
}
_bstr_t CXMLControl::GetNodeAttribute(const char *URL, const char *attrib)
{
 _bstr_t restr;

 MSXML::IXMLDOMNodePtr node;
 try
 {
  //获取当前节点
  node = this->m_pXMLDocument->selectSingleNode((_bstr_t)URL);
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"找不到节点/"" + (_bstr_t)URL + (_bstr_t)"/"!";
  throw CXMLException(msg);
 }
 try
 {
  //获取属性
  restr = (_bstr_t)node->attributes->getNamedItem(attrib)->text;
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"获取属性/"" + (_bstr_t)attrib + (_bstr_t)"/"失败!";
  throw CXMLException(msg);
 }
 return restr;
}

void CXMLControl::SaveXML(const char *file)
{
 try
 {
  //保存XML文档
  this->m_pXMLDocument->save(file);
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"保存到文件/"" + (_bstr_t)this->m_fileName + (_bstr_t)"/"失败";
  throw CXMLException(msg);
 }
}

bool CXMLControl::InsertNode(const char *parent, const char *node, const char *value)
{
 MSXML::IXMLDOMNodePtr pNode;
 try
 {
  //获取当前节点
  pNode = this->m_pXMLDocument->selectSingleNode((_bstr_t)parent);
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"父节点/"" + (_bstr_t)parent + (_bstr_t)"/"无效!";
  throw CXMLException(msg);
 }

 //添加
 try
 {
  IXMLDOMElementPtr pXMLChildNode;
  this->m_pXMLDocument->raw_createElement((_bstr_t)node, &pXMLChildNode);
  pXMLChildNode->Puttext((_bstr_t)value);
  pNode->appendChild(pXMLChildNode);

  this->m_pXMLDocument->save(this->m_fileName);
  return true;
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"添加节点/"" + (_bstr_t)node + (_bstr_t)"/"失败!";
  throw CXMLException(msg);
 }
 return false;
}

bool CXMLControl::DeleteNode(const char *URL)
{
 MSXML::IXMLDOMNodePtr pNode;
 try
 {
  //获取当前节点
  pNode = this->m_pXMLDocument->selectSingleNode((_bstr_t)URL);
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"节点/"" + (_bstr_t)URL + (_bstr_t)"/"无效!";
  throw CXMLException(msg);
 }

 //添加
 try
 {
  pNode->parentNode->removeChild(pNode);

  this->m_pXMLDocument->save(this->m_fileName);
  return true;
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"删除节点/"" + (_bstr_t)URL + (_bstr_t)"/"失败!";
  throw CXMLException(msg);
 }
 return false;
}

//得到DocumentPtr
IXMLDOMDocumentPtr CXMLControl::GetDocument()
{
 return this->m_pXMLDocument;
}

//通过可变参数加属性 可变参数的形式是 "name=value" 其中attribCount是可变参数的个数
bool CXMLControl::InsertNode2(const char *parent, const char *node, const char *value, int attribCount, ...)
{
 MSXML::IXMLDOMNodePtr pNode;
 try
 {
  //获取当前节点
  pNode = this->m_pXMLDocument->selectSingleNode((_bstr_t)parent);
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"父节点/"" + (_bstr_t)parent + (_bstr_t)"/"无效!";
  throw CXMLException(msg);
 }

 //添加
 try
 {
  IXMLDOMElementPtr pXMLChildNode;
  this->m_pXMLDocument->raw_createElement((_bstr_t)node, &pXMLChildNode);
  pXMLChildNode->Puttext((_bstr_t)value);
  //加属性
  va_list ap; //参数列表
  va_start(ap, attribCount); //开始参数
  for(int i = 0; i < attribCount; i++)
  {
   char *str = va_arg(ap, char *); //得到可变参数
   char *attrib_value = _tcschr(str, '='); //得到'='第一次出现的位置
   char attrib_name[50];// = str;
   long length = attrib_value - str;
   memset(attrib_name, 0, 50);
   _tcscpy(attrib_name, str);
   attrib_name[length] = '/0';
   attrib_value++;
   
   //加属性
   pXMLChildNode->setAttribute(attrib_name, attrib_value);
  }
  va_end(ap); //结束参数
  pNode->appendChild(pXMLChildNode);

  this->m_pXMLDocument->save(this->m_fileName);
  return true;
 }
 catch(...)
 {
  _bstr_t msg = (_bstr_t)"添加节点/"" + (_bstr_t)node + (_bstr_t)"/"失败!";
  throw CXMLException(msg);
 }
 return false;
}