C++访问XML

生成树根
MSXML::IXMLDOMElementPtr pDocElement=pDoc->createElement("China"); 
pDoc->appendChild(pDocElement);  
 
///添加节点
MSXML::IXMLDOMElementPtr pNewChildElement;  
 pNewChildElement=pDoc->createElement("Beijing");  
 pNewChildElement->Puttext("-11");  
 pDocElement->appendChild(pNewChildElement);  
 
 //显示树
count<<pDoc->xml<<endl;
 
//再添加节点
pNewChildElement=pDoc->createElement("Shanghai");  
 pNewChildElement->Puttext("9");  
 pNewChildElement->setAttribute("Weather",_variant_t("Cloudy"));  
 pDocElement->appendChild(pNewChildElement);  
 
//把刚加入的节点删除
pDocElement->removeChild (pNewChildElement);  
 
//保存文件
pDoc->save("test.XML");
 
//打开XML文件
MSXML::IXMLDOMDocumentPtr pDoc;  
 HRESULT hr =pDoc.CreateInstance(__uuidof(MSXML::DOMDocument));  
 if(!SUCCEEDED(hr))  
 {  
  cout << "无法创建DOMDocument对象，请检查是否安装了MS XML Parser 运行库!" << endl;  
  Exit();  
 }  
 pDoc->load("test.XML");  
 
///定位并删除节点
MSXML::IXMLDOMElementPtr pDocElement=pDoc->GetdocumentElement();  
 MSXML::IXMLDOMElementPtr pElement=pDocElement->selectSingleNode("Shanghai");  
 pDocElement->removeChild(pElement);  
 
//读取节点内容
 MSXML::IXMLDOMNodePtr   pRootNode=pDoc-> selectSingleNode( "China/Beijing "); 
 _bstr_t   strRequestType=pRootNode-> Gettext(); 
 cout<<"读取China/Beijing"<<strRequestType.operator   char   *()<<endl; 
 
 ****************************************************************************
// testXML.cpp : 定义控制台应用程序的入口点。

   #include "iostream" 
#include "msxml.h"  
#include "atlbase.h"  
#import "msxml.dll" //引入类型库  
using namespace std;
#ifdef _DEBUG  
#define new DEBUG_NEW  
#undef THIS_FILE  
static char THIS_FILE[] = __FILE__;  
#endif  
int Exit();  
void LoadFromString();  
void CreateXML();  
//XML文本模板  
_bstr_t XMLTemple=" -11 9 ";  
int main()  
{  
 cout << " XML编程--示范程序 " << endl;  
 CoInitialize(NULL); //初始化COM 环境  
 cout << "------生成新的XML文本 ------" << endl;  
 CreateXML();  
 cout << "------读取已有XML文本 ------" << endl;  
 LoadFromString();  
 return Exit();  
}  
void CreateXML()  
{  
 MSXML::IXMLDOMDocumentPtr pDoc;  
 HRESULT hr =pDoc.CreateInstance(__uuidof(MSXML::DOMDocument));  
 if(!SUCCEEDED(hr))  
 {  
  cout << "无法创建DOMDocument对象，请检查是否安装了MS XML Parser 运行库!" << endl;  
  Exit();  
 }  
 MSXML::IXMLDOMElementPtr pDocElement=pDoc->createElement("China");  
 pDoc->appendChild(pDocElement);  
 cout << "生成树根：\n" << pDoc->xml << endl;  
 MSXML::IXMLDOMElementPtr pNewChildElement;  
 pNewChildElement=pDoc->createElement("Beijing");  
 pNewChildElement->Puttext("-11");  
 pDocElement->appendChild(pNewChildElement);  
 cout << "添加节点：\n" << pDoc->xml << endl;  
 pNewChildElement=pDoc->createElement("Shanghai");  
 pNewChildElement->Puttext("9");  
 pNewChildElement->setAttribute("Weather",_variant_t("Cloudy"));  
 pDocElement->appendChild(pNewChildElement);  
  cout << "再添加节点：\n" << pDoc->xml << endl;  
 pDocElement->removeChild (pNewChildElement);  
 cout << "把刚加入的节点删除：\n" << pDoc->xml << endl;  
 pDoc->save("test.XML");
}  
void LoadFromString()  
{  
 MSXML::IXMLDOMDocumentPtr pDoc;  
 HRESULT hr =pDoc.CreateInstance(__uuidof(MSXML::DOMDocument));  
 if(!SUCCEEDED(hr))  
 {  
  cout << "无法创建DOMDocument对象，请检查是否安装了MS XML Parser 运行库!" << endl;  
  Exit();  
 }  
 pDoc->load("test.XML");  
 cout << "读取结果：\n" << pDoc->xml << endl;  
 
 MSXML::IXMLDOMNodePtr   pRootNode=pDoc-> selectSingleNode( "China/Beijing "); 
 _bstr_t   strRequestType=pRootNode-> Gettext(); 
 cout<<"读取China/Beijing"<<strRequestType.operator   char   *()<<endl; 
 
 MSXML::IXMLDOMElementPtr pDocElement=pDoc->GetdocumentElement();  
 MSXML::IXMLDOMElementPtr pElement=pDocElement->selectSingleNode("Beijing");  
 pDocElement->removeChild(pElement);  
 cout << "定位删除Shanghai节点：\n" << pDoc->xml << endl;  
 cout << "保存结果 Save .....(模拟而已)" << endl;  
 cout << "\n 好了，就这么简单" << endl;  
}  
int Exit()  
{  
 getchar();  
 return 1;  
}