VC里save XML文件格式问题

Question

我用IXMLDOMDocumentType操作XML文件，创建了一些节点然后save后，所有的东西都写在一行了，一点层次都没有，看起来特费劲，有没有什么办法让每个标记都占一行？

Answer 1

IMXWriter::put_indent(VARIANT_TRUE);
//下面代码未检验,MSXMLDOM2V4是我改的namespace
HRESULT hr;
MSXMLDOM2V4::IMXWriterPtr pWriter;
hr = pWriter.CreateInstance("msxml2.MXXMLWriter40");
VARIANT var;
var.vt = VT_BYREF|VT_UNKNOWN;
var.punkVal = m_pDoc;
pWriter->output = var;
if(szEncoding != NULL && lstrlen(szEncoding) > 0)
hr = pWriter->put_encoding(CComBSTR(szEncoding)); hr = pWriter->put_indent(VARIANT_TRUE);//缩进
hr = pWriter->put_version(L"1.0");
hr = pWriter->put_output(&CComVariant(szFilePath));
hr = pWriter->flush();
return hr;

Answer 2

IMXWriter::put_indent(VARIANT_TRUE);
//下面代码未检验,MSXMLDOM2V4是我改的namespace
HRESULT hr;
MSXMLDOM2V4::IMXWriterPtr pWriter;
hr = pWriter.CreateInstance("msxml2.MXXMLWriter40");
VARIANT var;
var.vt = VT_BYREF|VT_UNKNOWN;
var.punkVal = m_pDoc;
pWriter->output = var;
if(szEncoding != NULL && lstrlen(szEncoding) > 0)
hr = pWriter->put_encoding(CComBSTR(szEncoding)); hr = pWriter->put_indent(VARIANT_TRUE);//缩进
hr = pWriter->put_version(L"1.0");
hr = pWriter->put_output(&CComVariant(szFilePath));
hr = pWriter->flush();
return hr;

Answer 3

#include "stdafx.h"
#include <sstream>
#include <string>
#import "msxml4.dll" named_guids
using namespace MSXML2;
inline void linefeed(MSXML2::IXMLDOMDocument2Ptr pXMLDoc, MSXML2::IXMLDOMNode *pRootNode)
{
pRootNode->appendChild(pXMLDoc->createTextNode("\n"));
}
inline void addTextElement(MSXML2::IXMLDOMDocument2Ptr pXMLDoc, MSXML2::IXMLDOMNode *pRootNode,LPCTSTR value)
{
pRootNode->appendChild(pXMLDoc->createTextNode(value));
}
inline void addTabs(MSXML2::IXMLDOMDocument2Ptr pXMLDoc, MSXML2::IXMLDOMNode *pRootNode,int tabcount)
{
std::ostringstream oss;
for(int i=0;i<tabcount;i++)
oss<<"\t";
addTextElement(pXMLDoc,pRootNode,oss.str().c_str());
}
void addfile(LPCTSTR filename,MSXML2::IXMLDOMDocument2Ptr pXMLDoc, MSXML2::IXMLDOMNode *pRootNode,int tabcount)
{
MSXML2::IXMLDOMElementPtr pTempNode = NULL;

pTempNode = pXMLDoc->createElement(_T("file"));
linefeed(pXMLDoc,pTempNode);
addTabs(pXMLDoc,pTempNode,tabcount+1);
addTextElement(pXMLDoc,pTempNode,filename);
linefeed(pXMLDoc,pTempNode);
addTabs(pXMLDoc,pTempNode,tabcount);
addTabs(pXMLDoc,pRootNode,tabcount);
pRootNode->appendChild(pTempNode );
linefeed(pXMLDoc,pRootNode);
}
void savedir(LPCTSTR filename,MSXML2::IXMLDOMDocument2Ptr pXMLDoc, MSXML2::IXMLDOMNode *pRootNode,int tabcount)
{
if ((GetFileAttributes(filename) & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)
{
MSXML2::IXMLDOMNodePtr pDirNode= NULL;  addTabs(pXMLDoc,pRootNode,tabcount);
pDirNode = pRootNode->appendChild(pXMLDoc->createElement(_T("directory")));
// Step 6.3b: Creating RecID attribute for the Record element
MSXML2::IXMLDOMAttributePtr pRecIdAttr = NULL;
pRecIdAttr = pXMLDoc->createAttribute(_T("pathname"));
pRecIdAttr->nodeTypedValue = filename;
pDirNode->attributes->setNamedItem(pRecIdAttr);
linefeed(pXMLDoc,pDirNode); WIN32_FIND_DATA wfd= {0};
char allname[MAX_PATH];
strcpy(allname,filename);
if(filename[strlen(filename)-1]!='\\')
strcat(allname,"\\*.*");
else
strcat(allname,"*.*");
HANDLE  hFind = FindFirstFile(allname, &wfd); if (hFind == INVALID_HANDLE_VALUE)
return ;
do
{
if(wfd.cFileName[0]=='.')
continue;
strcpy(allname,filename);
strcat(allname,"\\");
strcat(allname,wfd.cFileName);
if((GetFileAttributes(allname) & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)
{
savedir(allname,pXMLDoc,pDirNode,tabcount+1);
}
else
{
addfile(wfd.cFileName,pXMLDoc,pDirNode,tabcount+1);
}
}while(FindNextFile(hFind, &wfd));
FindClose(hFind);
addTabs(pXMLDoc,pDirNode,tabcount); addTabs(pXMLDoc,pRootNode,tabcount);
}
else
{
addfile(filename,pXMLDoc,pRootNode,tabcount);
}
linefeed(pXMLDoc,pRootNode);}
void test()
{
MSXML2::IXMLDOMDocument2Ptr pXMLDoc        = NULL;
MSXML2::IXMLDOMParseError *pParsingErr = NULL;
MSXML2::IXMLDOMElement *element     = NULL;
MSXML2::IXMLDOMNodeList *childs      = NULL; 
pXMLDoc.CreateInstance("Msxml2.DOMDocument.4.0");
//Creating the Processing Instruction
MSXML2::IXMLDOMProcessingInstructionPtr pPI = NULL;
pPI = pXMLDoc->createProcessingInstruction("xml", "version='1.0' encoding='UTF-8'");
_variant_t vNullVal;
vNullVal.vt = VT_NULL;
pXMLDoc->insertBefore(pPI, vNullVal);
// Creating the Root Element
MSXML2::IXMLDOMNodePtr pRootNode= NULL; 
_variant_t varNodeType((short)MSXML2::NODE_ELEMENT);
pRootNode= pXMLDoc->createNode(varNodeType, 
_T("directorysave"), _T(""));
pXMLDoc->appendChild(pRootNode);
linefeed(pXMLDoc,pRootNode);
savedir("c:\\demo1",pXMLDoc,pRootNode,1);
pXMLDoc->save(_T("c:\\directory.xml"));
}
int _tmain(int argc, _TCHAR* argv[])
{
printf("save directory structure into a well formated(with tab and line feed/carriage return) xml file, by Onega\n");
CoInitialize(NULL);
test();
CoUninitialize();
return 0;
}