一个操作XML文件的简单类[zz]

http://www.ezikao.com.cn/art.view.asp?artid=5291

工作中经常要处理xml文件，每次都调用com那些对象很麻烦。而且大同小异，无非是复制原来的代码，再改改。于是有空的时候，把那些对象封装了一下，用起来舒服多了。
XML是什么东东我就不解释了

//XmlProcessor.h

#if !defined(AFX_XMLPROCESSOR_H__71FF307D_52F3_496D_B8F2_0E1A5449191F__INCLUDED_)
#define AFX_XMLPROCESSOR_H__71FF307D_52F3_496D_B8F2_0E1A5449191F__INCLUDED_

//上面那段预定义，在VC.net里面可以用： #pragma once

#import "msxml4.dll"
using namespace MSXML2;//此命名空间在VC.net下面会有冲突，需要重命名

class CXmlProcessor
{
public:
CXmlProcessor(void);
~CXmlProcessor(void);

public:
BOOL Open( LPCTSTR lpszPathName );
void Save( LPCTSTR lpszPathName ){ m_pXmlDoc->save( lpszPathName ); }
int Select ( LPCTSTR lpszNoteName );
void InsertNode ( LPCTSTR lpszNoteName);
void InsertElement ( LPCTSTR lpszEleName );
  
void SetAttribute ( LPCTSTR lpszAttrName, LPCTSTR lpszAttrValue )//设置节点属性
{
     m_pChildNode->setAttribute( (_bstr_t)lpszAttrName, (_bstr_t)lpszAttrValue );
}
void SetNodeTxt ( LPCTSTR lpszNodeTxt ){ m_pChildNode ->Puttext((_bstr_t) lpszNodeTxt ); }      // 设置字段文本值

void DeleteNode ( LPCTSTR lpszNodeName );

CString GetNodeValue ( int nNum);
            CString GetNodeName( int nNum )；
CString GetAttribute ( int nAttrNum ){     //获得节点属性值，参数为属性序号  
     m_pAttrs->get_item( nAttrNum, &m_pAttrItem);
     return (char*)(_bstr_t) m_pAttrItem -> nodeTypedValue;
}

private:
IXMLDOMDocumentPtr m_pXmlDoc;
IXMLDOMElementPtr     m_pXmlEle;
IXMLDOMElementPtr m_pChildNode;
IXMLDOMNamedNodeMapPtr m_pAttrs;
IXMLDOMNodePtr m_pAttrItem;
IXMLDOMNodeListPtr m_pItemlist;
};

//XmlProcessor.cpp

#include "StdAfx.h"
#include ".\xmlprocess.h"
#include "upgrade.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

CXmlProcessor::CXmlProcessor(void)
{
HRESULT hr = m_pXmlDoc.CreateInstance(__uuidof(DOMDocument30));
if(!SUCCEEDED(hr))
{   
     AfxMessageBox("无法创建DOMDocument对象，请检查是否安装了MS XML Parser 运行库!");
}
}

CXmlProcessor::~CXmlProcessor(void)
{
}

BOOL CXmlProcessor::Open( LPCTSTR lpszPathName )
{
HRESULT hr = m_pXmlDoc->load( lpszPathName );

if ( SUCCEEDED(hr) )
     return true;
else
     return false;

}

int CXmlProcessor::Select( LPCTSTR lpszNoteName )//按节点名查找
{

       m_pXmlEle = (IXMLDOMElementPtr)( m_pXmlDoc->selectSingleNode( lpszNoteName ) );

m_pItemlist = m_pXmlEle->GetchildNodes();

int nCount = m_pItemlist->length;

return nCount;
}

void CXmlProcessor::InsertNode (     LPCTSTR lpszNoteName )//插入一个没有子节点的节点（字段）
{
if ( m_pXmlEle == NULL )
{
     m_pXmlEle = m_pXmlDoc->createElement( (_bstr_t)(char*) lpszNoteName );
     m_pXmlDoc->appendChild( m_pXmlEle );
}
else
{
     m_pChildNode = m_pXmlDoc->createElement( (_bstr_t)(char*) lpszNoteName );
     m_pXmlEle->appendChild( m_pChildNode );
}

}

void CXmlProcessor::InsertElement( LPCTSTR lpszEleName )//插入一个拥有子节点的节点
{
m_pChildNode = m_pXmlDoc->createElement( (_bstr_t)(char*) lpszEleName );
m_pXmlEle->appendChild( m_pChildNode );

int nCount = m_pItemlist->length;
m_pXmlEle = m_pItemlist->item[ nCount - 1 ];
}

void CXmlProcessor::DeleteNode( LPCTSTR lpszNodeName ) //删除Select函数查找到的节点下（或跟节点下）所有指定的子节点
{
IXMLDOMSelectionPtr xmlSel;
xmlSel = m_pXmlDoc->selectNodes( lpszNodeName );
xmlSel->removeAll();
}

CString CXmlProcessor::GetNodeName( int nNum )     //返回节点名
{
m_pChildNode = m_pItemlist->item[ nNum ];
m_pChildNode->get_attributes(&m_pAttrs);
return (char*)(_bstr_t)m_pChildNode->nodeName;
}

CString CXmlProcessor::GetNodeName( int nNum )     //返回节点值
{
m_pChildNode = m_pItemlist->item[ nNum ];
m_pChildNode->get_attributes(&m_pAttrs);
return (char*)(_bstr_t)m_pChildNode->nodeTypedValue;
}