虽然网上会有XML入门或者多少天教会XML,一般都是从普通的功能概念开始啰嗦,个人还是比较喜欢从实例开始,遇到不懂直接查(不过这次选了一个比较难得例子,研究了好久^_^)。刚开始看了一个vc6.0XML的例子,调通了,不过要用VS2008开发,想移植到VS2008,挺麻烦的,就没咋看,有需要可以下载看看。
工具:notepad++、VS2008(MSXML6.0)
来自msdn的例子(经过修改,因为升级到MSXML6.0,有些关键字不太一样了),
需要文件books.xml,books.vsd(博客只支持xml文件,vsd修改后缀就可以)
#include <stdio.h>
#import <msxml6.dll>
using namespace MSXML2; int main(int argc, char* argv[])
{
HRESULT hr; CoInitialize(NULL); IXMLDOMDocument3Ptr pXMLDoc;
IXMLDOMDocument3Ptr pXSDDoc;
IXMLDOMSchemaCollectionPtr pSCache;
IXMLDOMParseError2Ptr pEitem;
IXMLDOMParseError2Ptr pError; hr = pXMLDoc.CreateInstance(__uuidof(DOMDocument60));
if(FAILED(hr)){
printf("Failed to CreateInstance on an XML DOM");
return -;
} pXMLDoc->async = VARIANT_FALSE;
pXMLDoc->validateOnParse = VARIANT_FALSE;
hr = pXMLDoc->setProperty("MultipleErrorMessages", VARIANT_TRUE);
if(FAILED(hr)){
printf("Failed to enable multiple validation errors\n");
return -;
}
if(pXMLDoc->load("..\\books.xml")!=VARIANT_TRUE){
printf("Failed to load Dom from books.xml. %s\n",
(LPCSTR)pXMLDoc->parseError->reason);
return -;
} hr = pXSDDoc.CreateInstance(__uuidof(DOMDocument60));
if(FAILED(hr)){
printf("Failed to CreateInstance on an XSD DOC");
return -;
}
pXSDDoc->async = VARIANT_FALSE;
pXSDDoc->validateOnParse = VARIANT_FALSE;
if(pXSDDoc->load("..\\books.xsd")!=VARIANT_TRUE){
printf("Failed to load XSD from books.xsd. %s\n",
(LPCSTR)pXSDDoc->parseError->reason);
return -;
} hr = pSCache.CreateInstance(__uuidof(XMLSchemaCache60));
if(FAILED(hr)){
printf("Cannot instantiate XMLSchemaCache60\n");
return -;
}
pXMLDoc->schemas = pSCache.GetInterfacePtr(); hr = pSCache->add("urn:books", pXSDDoc.GetInterfacePtr());
if(FAILED(hr)){
printf("Cannot add 'urn:books' to schema cache.\n");
return -;
} //Validate the entire DOM object.
pError = pXMLDoc->validate();
if(pError->errorCode != ){
printf("Error as returned from validate():\n\n");
printf("\tError Code: %d\n", pError->errorCode);
printf("\tError reson: \n%s", (LPCSTR)pError->reason);
printf("\tError location: \n%s\n", (LPCSTR)pError->errorXPath);
printf("\tErrors count: %d\n", pError->allErrors->length);
printf("\nError items from the allErrors collection:\n"); for(int i=;i<pError->allErrors->length;i++){
pEitem = pError->allErrors->item[i];
printf("\nErrorItem[%d]:\n", i);
printf("\treason:\n%s", (LPCSTR)pEitem->reason);
printf("\tlocation: \n%s\n", (LPCSTR)pEitem->errorXPath);
}
}else{
printf("valid dom as follows:\n%s\n",
(LPCSTR)pXMLDoc->xml);
} pError.Release();
pEitem.Release();
pXMLDoc.Release();
pXSDDoc.Release();
pSCache.Release(); CoUninitialize();
return ;
}
注:1、pXMLDoc->load("..\\books.xml"),文件路径是工程根目录
2、例子是XSD对XML文件的validate
3、把不懂的地方查懂XML入门是没问题