VC ++ MSXML create an XML file and an XML document parsing

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// XmlCreationDemo.cpp

#include <stdlib.h>

#include <stdio.h>

// imports MSXML parser

#import <msxml4.dll>

using namespace MSXML2;

class InitializeCom

{

public:

InitializeCom() { CoInitialize(NULL); // Initializes the COM library }

~InitializeCom() { CoUninitialize(); // Closes the COM library }

InitCom};

int main ()

{

char * szXmlFile = "D: \\ china.xml"; // xml file

IXMLDOMDocumentPtr pDoc = NULL; // xml document

IXMLDOMProcessingInstructionPtr pProInstruction = NULL; // xml声明

IXMLDOMCommentPtr pComment = NULL; // comment

IXMLDOMElementPtr pRootElement = NULL, pElement = NULL; // root node (element)

IXMLDOMNodePtr pNode = NULL, pNode1 = NULL, pNode2 = NULL; // node

IXMLDOMAttributePtr pAttrNode = NULL; // Properties

HRESULT hr = pDoc.CreateInstance(__uuidof(DOMDocument40)); //

if (FAILED(hr))

{

printf ( "Unable to create DOMDocument40 objects, check for installed and initialized MsXml Parser Library!");

return EXIT_FAILURE;

}

// (1) create xml document declaration (or insertBefore root)

pProInstruction = pDoc->createProcessingInstruction((_bstr_t)(char*)"xml", (_bstr_t)(char*)"version=\"1.0\" encoding=\"utf-8\"");

pDoc->appendChild((IXMLDOMNode*)pProInstruction);

// (2) Create a root <China>

pRootElement = pDoc->createElement((_bstr_t)(char*)"China");

pDoc->PutRefdocumentElement(pRootElement); // pXMLDomDoc->documentElement = pRootElement;

// (3) create a node <China> <Continent>

pComment = pDoc-> createComment ((_ bstr_t) (char *) "where the continent");

pRootElement-> appendChild ((IXMLDOMNode *) pComment); // comments

pNode = pDoc->createNode((_variant_t)(long)NODE_ELEMENT, (_bstr_t)(char*)"Continent", (_bstr_t)(char*)"");

pNode->Puttext((_bstr_t)(char*)"Asia"); // pNode->text = "Asia";

pRootElement-> appendChild (pNode); // node

// (4) create a node <China> <Population>

pComment = pDoc-> createComment ((_ bstr_t) (char *) "population");

pRootElement-> appendChild ((IXMLDOMNode *) pComment); // comments

pElement = pDoc->createElement((_bstr_t)(char*)"Population");

pAttrNode = pDoc->createAttribute((_bstr_t)(char*)"Units");

pAttrNode->Puttext((_bstr_t)(char*)"Million Person");

pElement-> setAttributeNode (pAttrNode); // statistical unit

pElement-> setAttribute ((_ bstr_t) (char *) "StatisticalYear", (_variant_t) (char *) "2000"); // Statistics Year

pElement->Puttext((_bstr_t)(char*)"1,296");

pRootElement-> appendChild (pElement); // node

// (5) create a node <China> <Municipality>

pComment = pDoc-> createComment ((_ bstr_t) (char *) "four municipality");

pRootElement-> appendChild ((IXMLDOMNode *) pComment); // comments

pNode = pDoc->createNode((_variant_t)(long)NODE_ELEMENT, (_bstr_t)(char*)"Municipality", (_bstr_t)(char*)"");

pRootElement-> appendChild (pNode); // node

// (6) create a node <China> <Municipality> <TianJin>

pNode1 = pDoc->createNode((_variant_t)(long)NODE_ELEMENT, (_bstr_t)(char*)"TianJin", (_bstr_t)(char*)"");

// Create a node <China> <Municipality> <TianJin> <Area>

pElement = pDoc->createElement((_bstr_t)(char*)"Area");

pElement-> setAttribute ((_ bstr_t) (char *) "Units", (_variant_t) (char *) "Thousand Square kilometers"); // statistical unit

pElement->Puttext((_bstr_t)(char*)"12");

pNode1-> appendChild ((IXMLDOMNode *) pElement); // node

// Create a node <China> <Municipality> <TianJin> <Population>

pElement = pDoc->createElement((_bstr_t)(char*)"Population");

pElement-> setAttribute ((_ bstr_t) (char *) "Units", (_variant_t) (char *) "Million Person"); // statistical unit

pElement-> setAttribute ((_ bstr_t) (char *) "StatisticalYear", (_variant_t) (char *) "2000"); // Statistics Year

pElement->Puttext((_bstr_t)(char*)"10.01");

pNode1-> appendChild ((IXMLDOMNode *) pElement); // node

pNode->appendChild(pNode1);

// (7) create a node <China> <Municipality> <BeiJing> and insert <TianJin> before

pNode2 = pDoc->createNode((_variant_t)(long)NODE_ELEMENT, (_bstr_t)(char*)"BeiJing", (_bstr_t)(char*)"");

// Create a node <China> <Municipality> <BeiJing> <Area>

pElement = pDoc->createElement((_bstr_t)(char*)"Area");

pElement-> setAttribute ((_ bstr_t) (char *) "Units", (_variant_t) (char *) "Thousand Square kilometers"); // statistical unit

pElement->Puttext((_bstr_t)(char*)"17");

pNode2-> appendChild ((IXMLDOMNode *) pElement); // node

// Create a node <China> <Municipality> <BeiJing> <Population>

pElement = pDoc->createElement((_bstr_t)(char*)"Population");

pElement-> setAttribute ((_ bstr_t) (char *) "Units", (_variant_t) (char *) "Million Person"); // statistical unit

pElement-> setAttribute ((_ bstr_t) (char *) "StatisticalYear", (_variant_t) (char *) "2000"); // Statistics Year

pElement->Puttext((_bstr_t)(char*)"13.82");

pNode2-> appendChild ((IXMLDOMNode *) pElement); // node

pNode->insertBefore(pNode2, (_variant_t)(IDispatch*)pNode1);

// (8) to create a node <China> <Municipality> <ShangHai>

// (9) create a node <China> <Municipality> <ChongQing>

pDoc->save((_variant_t)szXmlFile);

return EXIT_SUCCESS;

}

=========================== generated china.xml document content: =============== =======================================

<?xml version="1.0" encoding="utf-8"?>

<China>

<! - where the continent ->

<! - population ->

<! - four municipalities ->

</BeiJing>

</TianJin>

</ShangHai>

</ChongQing>

</Municipality>

</China>

=================================

two. MsXml parse XML documents Example:

// XmlParsingDemo.cpp

#include <stdlib.h>

#include <stdio.h>

// imports MSXML parser

#import <msxml4.dll>

using namespace MSXML2;

class InitializeCom

{

public:

InitializeCom() { CoInitialize(NULL); // Initializes the COM library }

~InitializeCom() { CoUninitialize(); // Closes the COM library }

InitCom};

int main ()

{

char * szXmlFile = "D: \\ china.xml"; xml document created // Part

IXMLDOMDocumentPtr pDoc = NULL; // xml document

IXMLDOMNodeListPtr pNodeList = NULL; // node list

IXMLDOMElementPtr pRootElement = NULL, pElement = NULL; // root node (element)

IXMLDOMNodePtr pNode = NULL, pNode1 = NULL; // node

IXMLDOMNamedNodeMapPtr pAttrList = NULL; // attribute list

IXMLDOMAttributePtr pAttrNode = NULL; // Properties

long lChilds, lAttr, i;

HRESULT hr = pDoc.CreateInstance(__uuidof(DOMDocument40));

if (FAILED(hr))

{

printf ( "Unable to create DOMDocument40 objects, check for installed and initialized MsXml Parser Library!");

return EXIT_FAILURE;

}

VARIANT_BOOL bXmlLoad = pDoc->load((_variant_t)szXmlFile);

if (! bXmlLoad) // failed to load

{

printf ( "!% s failed to load \ n", szXmlFile);

return EXIT_FAILURE;

}

// (1) root

pRootElement = pDoc->GetdocumentElement();

printf("root = %s\n", (char*)pRootElement->GetnodeName()); // pRootElement->nodeName

@ (2) a child node of the root node

pNodeList = pRootElement->GetchildNodes(); // pRootElement->childNodes

lChilds = pNodeList->Getlength(); // pNodeList->length

for (i = 0; i < lChilds; i++)

{

pNode = pNodeList->Getitem(i); // pNodeList->item[i]

if (pNode-> GetnodeType ()! = NODE_COMMENT) // comment node Filter

{

printf("child[%d] of [%s]: [%s]\n", i ,(char*)pRootElement->GetnodeName(), (char*)pNode->GetnodeName());

}

// (3) statistical document all <Population> node

pNodeList = pDoc->getElementsByTagName((_bstr_t)(char*)"Population");

lChilds = pNodeList->Getlength();

printf ( "document [Population] There are% d \ n", lChilds);

// <Population> node under (4) root

pNode = pRootElement->selectSingleNode((_bstr_t)(char*)"Population");

When the root node is known // <China>: pNode = pDoc-> selectSingleNode ((_ bstr_t) (char *) "China // Population");

printf ( "[Population] child node below the root node of% s \ n", (char *) pNode-> Gettext ());

pAttrList = pNode->Getattributes();

lAttr = pAttrList->Getlength();

for (i = 0; i < lAttr; i++)

{

pAttrNode = pAttrList->Getitem(i);

printf("Attr[%d] of [%s]: %s = %s\n", i, (char*)pNode->GetnodeName(), (char*)pAttrNode->GetnodeName(), (char*)pAttrNode->Gettext());

}

All sub-node // (5) find the node <Municipality> under

// "//" indicates that at any one looking Municipality; all child nodes "// *" Find <Municipality> </ Municipality> in

pNodeList = pDoc-> selectNodes ((_ bstr_t) (char *) "// Municipality // *"); // herein may be replaced pRootElement pDoc

while (pNode = pNodeList->nextNode())

{

printf("childs of [Municipality]: %s\n", (char*)pNode->GetnodeName());

}

A // child node (6) lookup node <Municipality> under

pNode = pRootElement->selectSingleNode((_bstr_t)(char*)"Municipality");

pNodeList = pNode->GetchildNodes();

lChilds = pNodeList->Getlength();

for (i = 0; i < lChilds; i++)

{

pNode1 = pNodeList->Getitem(i); // pNodeList->item[i]

printf("child[%d] of [Municipality]: %s\n", i, (char*)pNode1->GetnodeName());

}

// (7) query parent, child, brother, brother node

pNode = pRootElement->selectSingleNode((_bstr_t)(char*)"//TianJin");

pNode1 = pNode-> GetparentNode (); // parent node

printf ( "[TianJin] parent to [% s] \ n", (char *) pNode1-> GetnodeName ());

pNodeList = pNode-> GetchildNodes (); // child node

lChilds = pNodeList->Getlength();

for (i = 0; i < lChilds; i++)

{

pNode1 = pNodeList->nextNode();

printf("child[%d] of [TianJin]: %s\n", i, (char*)pNode1->GetnodeName());

}

pNode1 = pNode-> GetpreviousSibling (); // brother node

printf ( "brother node [TianJin] is [% s] \ n", (char *) pNode1-> GetnodeName ());

pNode1 = pNode-> GetnextSibling (); // brother node

printf ( "brother node [TianJin] is [% s] \ n", (char *) pNode1-> GetnodeName ());

return EXIT_SUCCESS;

}

==================================================

Results are as follows:

root = China
child[1] of <China>: <Continent>
child[3] of <China>: <Population>
child[5] of <China>: <Municipality>
文档中<Population>共有5个
根节点下的<Population>子节点值为1,296
Attr[0] of <Population>: Units = Million Person
Attr[1] of <Population>: StatisticalYear = 2000
childs of <Municipality>: BeiJing
childs of <Municipality>: Area
childs of <Municipality>: Population
childs of <Municipality>: TianJin
childs of <Municipality>: Area
childs of <Municipality>: Population
childs of <Municipality>: ShangHai
childs of <Municipality>: Area
childs of <Municipality>: Population
childs of <Municipality>: ChongQing
childs of <Municipality>: Area
childs of <Municipality>: Population
child[0] of <Municipality>: BeiJing
child[1] of <Municipality>: TianJin
child[2] of <Municipality>: ShangHai
child[3] of <Municipality>: ChongQing
<TianJin>的父节点为<Municipality>
child[0] of <TianJin>: Area
child[1] of <TianJin>: Population
<TianJin>的兄节点为<BeiJing>
<TianJin>的弟节点为<ShangHai>

ON. Posted 2011-11-18 16:32 the On at The Way reading ( ... ) Comments ( ... ) edit collections

Reproduced in: https: //www.cnblogs.com/areliang/archive/2011/11/18/2254334.html

VC ++ MSXML create an XML file and an XML document parsing

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