//定義智能接口指針
#include<comdef.h>
#include<msxml.h>
_COM_SMARTPTR_TYPEDEF(IXMLDOMDocument,__uuidof(IXMLDOMDocument));
_COM_SMARTPTR_TYPEDEF(IXMLDOMElement,__uuidof(IXMLDOMElement));
_COM_SMARTPTR_TYPEDEF(IXMLDOMNodeList,__uuidof(IXMLDOMNodeList));
_COM_SMARTPTR_TYPEDEF(IXMLDOMNode,__uuidof(IXMLDOMNode));
//IXMLDOMElement 初始化指向根節點;注意相當于數據庫database
//IXMLDOMNodeList 子節點鏈表;注意相當于表table;或者相當于記錄recordset
//IXMLDOMNode 子節點鏈表中指定節點的指針;注意相當于得到表中指定的一條記錄,也可以是單個字段

/*

#import <msxml.dll> named_guids
using namespace MSXML;
替代上面

*/

bool GetxmlData(void)
{
 bool loop=false;
 //XML文檔指針
 HRESULT hr=S_OK;
    IXMLDOMDocumentPtr ptrXMLFile=NULL;
 hr=ptrXMLFile.CreateInstance(CLSID_DOMDocument);
 if(SUCCEEDED(hr)&& ptrXMLFile!=NULL)
 {
  //得到XML文件的路徑
  CStringA path;
  m_HttpRequest.GetPhysicalPath(path);
  path.Append("Product.xml");
  
  //加載XML文檔
        VARIANT_BOOL vbLoaded=VARIANT_FALSE;
  ptrXMLFile->put_async(VARIANT_FALSE);
  ptrXMLFile->load(_variant_t(path),&vbLoaded);
  
  //成功加載后的處理
  if(SUCCEEDED(hr)&& vbLoaded==VARIANT_TRUE)
  {
   
   //XML文檔元素指針,初始化指向根節點;注意相當于數據庫database
   IXMLDOMElementPtr ptrDocRoot=NULL;
   hr=ptrXMLFile->get_documentElement(&ptrDocRoot);
   if(SUCCEEDED(hr)&&ptrDocRoot!=NULL)
   {
    
    //獲取子節點鏈表;注意相當于表table;或者相當于記錄recordset
    IXMLDOMNodeListPtr ptrProductList=NULL;
    hr=ptrDocRoot->get_childNodes(&ptrProductList);
    if(SUCCEEDED(hr)&& ptrProductList!=NULL)
    {
     //獲取子節點鏈表中的個數;注意相當于得到記錄的個數
     long productNum=0;
     hr=ptrProductList->get_length(&productNum);
     if(SUCCEEDED(hr)&& productNum)
     {
      
      //獲取子節點鏈表中指定節點的指針;注意相當于得到表中指定的一條記錄,
      //這里是相當整個字段
      IXMLDOMNodePtr ptrProduct=NULL;
      static long NodeNum=0;//注意事項記錄號index
      hr=ptrProductList->get_item(NodeNum,&ptrProduct);
      loop=true;
      NodeNum++;
      if(NodeNum>productNum)
      { loop=false; }
      
      if(SUCCEEDED(hr)&&ptrProduct!=NULL)
      {
       
       //單個字段,及name,這里也就是最小標簽元素
       IXMLDOMNodePtr Field=NULL;
       _bstr_t bField;
       BSTR Text=NULL;
       bField="name";
       
       //獲取name元素的內容
       hr=ptrProduct->selectSingleNode(bField,&Field);
       if(SUCCEEDED(hr)&& Field!=NULL)
       {
        Field->get_text(&Text);//修改用Field->put_text(&Text);
        m_name=Text;
        Text=NULL;
        Field=NULL;
       }
       
       //獲取price1元素的內容
       bField="price1";
       hr=ptrProduct->selectSingleNode(bField,&Field);
       CString S1;
       wchar_t * S2;
       if(SUCCEEDED(hr)&& Field!=NULL)
       {
        Field->get_text(&Text);
        S1=Text;
        S2=S1.GetBuffer(S1.GetLength());
        S1.ReleaseBuffer();
        m_price[0]=_wtof(S2);
         SysFreeString(Text);
        Text=NULL;
        Field=NULL;
       }
       
       //獲取price2元素的內容
                            bField="price2";
       hr=ptrProduct->selectSingleNode(bField,&Field);
       if(SUCCEEDED(hr)&& Field!=NULL)
       {
        Field->get_text(&Text);
        S1=Text;
        S2=S1.GetBuffer(S1.GetLength());
        S1.ReleaseBuffer();
        m_price[1]=_wtof(S2);
         SysFreeString(Text);
        Text=NULL;
        Field=NULL;
       }
       
       //獲取price3元素的內容
       bField="price3";
       hr=ptrProduct->selectSingleNode(bField,&Field);
       if(SUCCEEDED(hr)&& Field!=NULL)
       {
        Field->get_text(&Text);
        S1=Text;
        S2=S1.GetBuffer(S1.GetLength());
        S1.ReleaseBuffer();
        m_price[2]=_wtof(S2);
         SysFreeString(Text);
        Text=NULL;
        Field=NULL;
       }
       
       //獲取price4元素的內容
       bField="price4";
       hr=ptrProduct->selectSingleNode(bField,&Field);
       if(SUCCEEDED(hr)&& Field!=NULL)
       {
        Field->get_text(&Text);
        S1=Text;
        S2=S1.GetBuffer(S1.GetLength());
        S1.ReleaseBuffer();
        m_price[3]=_wtof(S2);
         SysFreeString(Text);
        Text=NULL;
        Field=NULL;
       }
       
       //獲取price5元素的內容
       bField="price5";
       hr=ptrProduct->selectSingleNode(bField,&Field);
       if(SUCCEEDED(hr)&& Field!=NULL)
       {
        Field->get_text(&Text);
        S1=Text;
        S2=S1.GetBuffer(S1.GetLength());
        S1.ReleaseBuffer();
        m_price[4]=_wtof(S2);
         SysFreeString(Text);
        Text=NULL;
        Field=NULL;
       }
       ptrProduct=NULL;

      }
     }
     ptrProductList=NULL;
    }
    ptrDocRoot=NULL;
   }
  }
  ptrXMLFile=NULL;
 }
 m_start=true;
 return loop;
}