C++访问XML

港控/mmm° 2023-10-18 08:24 36阅读 0赞

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;  }