【图】XML字符串的读写操作函数及示例程序

以下为引用的内容：

// OpXML.cpp : Defines the entry point for the console application.
//

//----------------------- Coded By Ronk --------------------------//
//----------------------- 2005-07-17 --------------------------//

#include "stdafx.h"
#include stdio.h

//---You must Setup the MSXML4.0 before using
#import msxml4.dll
using namespace MSXML2;

void xmlread(char *ch1,char *ch2,char *ch3);//Read the xmlstr and Get the Text of the Element

void xmlupdate(char *ch1,char *ch2,char *ch3);//Read the xmlstr and Update the Text of the Element

int main(int argc, char* argv[])
{
char xmlstr[1024]="inesmsgmsgheadversionLZD/versionrootioio/root/msghead/inesmsg";
char strele[1024]="//version//";
char textstr[1024]="NNYX";
char value[1024];

printf("The xmlstr is :%s",xmlstr);

xmlread(xmlstr,strele,value); //befor Update
printf("The Text of Element befor Update is: %s",value);

xmlupdate(xmlstr,strele,textstr);//Change the Text of "version" with "NNYX"
printf("The Updated xmlstr is :%s",xmlstr);

xmlread(xmlstr,strele,value);//after Update
printf("The Text of Element after Update is :%s",value);

return 0;
}

void xmlread(char* msgstr,char* elestr,char *tex)
{
//Initialize
CoInitialize(NULL);

IXMLDOMDocumentPtr pXmlDoc;
IXMLDOMNodePtr pXmlNode;

HRESULT hr;
hr = pXmlDoc.CreateInstance(__uuidof(DOMDocument));
if (FAILED(hr))
{
printf("Faild to Create XMLDom Instance !");
pXmlDoc=NULL;
}
else
{
pXmlDoc -async = VARIANT_FALSE;

//Load xmlmsg
_bstr_t xmlstr=(LPCSTR)msgstr;

if (!(pXmlDoc-loadXML(msgstr)))
{
   printf("Failed to Load xmlstr:%s",(LPCSTR)pXmlDoc-parseError-Getreason());
   pXmlDoc=NULL;
}
else
{
   //Locate the Element
   _bstr_t str=(LPCSTR)elestr;
   pXmlNode = pXmlDoc -selectSingleNode(elestr);

   if(FAILED(pXmlNode))
    printf("Faild to Locate the Element %s",str);
   else
   {
    //Read the Text of Element
    strcpy(tex,(LPCSTR)pXmlNode -text);


    //Realese
    pXmlDoc.Release();
    pXmlNode.Release();
   }
}
}
}

void xmlupdate(char *msgstr,char *elestr,char *upstr)
{
//---Initialize
CoInitialize(NULL);

IXMLDOMDocumentPtr pXmlDoc;
IXMLDOMNodePtr pXmlNode;

HRESULT hr;
hr = pXmlDoc.CreateInstance(__uuidof(DOMDocument));

if (FAILED(hr))
{
printf("Faild to Create XMLDom Instance !");
pXmlDoc=NULL;
}
else
{
pXmlDoc -async = VARIANT_FALSE;

//Load xml str
_bstr_t xmlstr=(LPCSTR)msgstr;

if (!(pXmlDoc-loadXML(msgstr)))
{
   printf("Failed to load xmlstr:%s",(LPCSTR)pXmlDoc-parseError-Getreason());
   pXmlDoc=NULL;
}
else
{
   //Located the Element
   _bstr_t str=(LPCSTR)elestr;
   pXmlNode = pXmlDoc -selectSingleNode(elestr);

   if (FAILED(pXmlNode))
    printf("Failed to Locate the Element %s",str);
   else
   {
    //Update the Text of the Element
    pXmlNode-text = upstr;

    //Get the New xmlstr
    strcpy(msgstr,(LPCSTR)pXmlDoc-xml);

    //Realese
    pXmlDoc.Release();
    pXmlNode.Release();
   }
}
}
}