#include "stdafx.h"
#include<atlbase.h>
#include <iostream.h>
void readxml(CComBSTR bstrSS);
void main()
{
int n=0;
for(;;)
{
cout<<"------1.view name 2.view sex 3.view age 4.view class 5.exit-----"<<endl;
cin>>n;
if(n==1){ CComBSTR bstrSS = L"xmldata/xmlname"; readxml(bstrSS); }
else if(n==2){ CComBSTR bstrSS = L"xmldata/xmlsex"; readxml(bstrSS); }
else if(n==3){ CComBSTR bstrSS = L"xmldata/xmlage"; readxml(bstrSS); }
else if(n==4){ CComBSTR bstrSS = L"xmldata/xmlclass"; readxml(bstrSS); }
else if(n==5) exit(1);
}
}
void readxml(CComBSTR bstrSS)
{
// 初始化COM接口
CoInitialize(NULL);
try
{
// 通过智能指针创建一个解析器的实例
CComPtr <IXMLDOMDocument> spXMLDOM;
HRESULT hr = spXMLDOM.CoCreateInstance(__uuidof(DOMDocument));
if(FAILED(hr)) throw "不能创建XML Parser对象";
if(spXMLDOM.p==NULL) throw "不能创建XML Parser对象";
//创建成功，开始装载XML文档
VARIANT_BOOL bSuccess = false;
hr=spXMLDOM->load(CComVariant(L"xmldata.xml"),&bSuccess);
if(FAILED(hr)) throw "不能够";
if(!bSuccess) throw "XML";
CComPtr <IXMLDOMNode> spXMLNode;
hr =spXMLDOM->selectSingleNode(bstrSS,&spXMLNode);
if (FAILED(hr)) throw "xmldata";
if (spXMLNode.p == NULL) throw "xmldata";
CComVariant varValue(VT_EMPTY);
hr =spXMLNode->get_nodeTypedValue(&varValue);
if(FAILED(hr)) throw "xmldata";
if(varValue.vt == VT_BSTR)
{
USES_CONVERSION;
LPTSTR lpstrMsg = W2T(varValue.bstrVal);
cout<< lpstrMsg <<endl;
}
else
{
throw "xmldata";
}
}
catch(...){cout << "xml" <<endl <<endl; }
CoUninitialize();
}
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