我使用MSXML DOM创建XML文件，怎么在文件开头写上一些注释？

Question

比如我想写上：
<?xml-stylesheet href="a.xsl" type="text/xsl" ?>怎么搞？

Answer 1

谢谢，在MSDN上找了一段，
并且仔细研读了一遍然后移植到我的源码中，
但createProcessingInstruction和appendChild函数说我参数个数有误
只好估摸着修改了参数个数，就产生了异常（AppendChild处）。
这个是不是XML的版本差异性？我的MSDN版本2001JUL
编译环境：WindowsXPsp2+VC6+SP5附：MSDN中的原文
mk:@MSITStore:D:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001JUL\1033Example
#import "msxml3.dll"
using namespace MSXML2;#define CHECK_AND_RELEASE(pInterface)  \
   if(pInterface) \
   {\
      pInterface->Release();\
      pInterface = NULL;\
   }\#define RELEASE(pInterface)  \
   {\
      pInterface->Release();\
      pInterface = NULL;\
   }\BOOL BuildDynamicXMLwithProcessingInstruction()
{
   BOOL bResult = FALSE;
   IXMLDOMDocument *pIXMLDOMDocument=NULL;
   IXMLDOMElement *pIXMLDOMElement=NULL;
   IXMLDOMProcessingInstruction *pIXMLDOMProcessingInstruction=NULL;
   IXMLDOMNode *pIXMLDOMNode = NULL;
   HRESULT hr ;
   BSTR bstrValue ;   try
   {
      hr=CoCreateInstance(CLSID_DOMDocument, NULL, CLSCTX_SERVER, 
IID_IXMLDOMDocument2, (LPVOID*)(&pIXMLDOMDocument));
      SUCCEEDED(hr) ? 0 : throw hr;      if(pIXMLDOMDocument)
      {
         hr=pIXMLDOMDocument->createElement(_T("Node1"), &pIXMLDOMElement);
         if(SUCCEEDED(hr) && pIXMLDOMElement)
         {
            hr=pIXMLDOMElement->put_text(_T("test"));
            if(SUCCEEDED(hr))
            {
               hr=pIXMLDOMDocument->createProcessingInstruction(_T("xml"),
 _T("version='1.0'"), &pIXMLDOMProcessingInstruction);
               if(SUCCEEDED(hr) && pIXMLDOMProcessingInstruction)
               {
                  pIXMLDOMDocument->appendChild( 
                              pIXMLDOMProcessingInstruction, &pIXMLDOMNode);
               pIXMLDOMDocument->putref_documentElement(pIXMLDOMElement);
               hr=pIXMLDOMDocument->get_xml(&bstrValue);
               if(SUCCEEDED(hr))
               {
               ::MessageBox(NULL, bstrValue, _T("Loaded Doc"), MB_OK);
                  bResult=TRUE;
                  }
                  CHECK_AND_RELEASE(pIXMLDOMNode);
                  RELEASE(pIXMLDOMProcessingInstruction);
               }
            }
            RELEASE(pIXMLDOMElement);
         }
         RELEASE(pIXMLDOMDocument);
      }
   }
   catch(...)
   {
      CHECK_AND_RELEASE(pIXMLDOMElement);
      CHECK_AND_RELEASE(pIXMLDOMDocument);
      CHECK_AND_RELEASE(pIXMLDOMNode);
      CHECK_AND_RELEASE(pIXMLDOMProcessingInstruction);
      DisplayErrorToUser();
   }
   return bResult;
}
Output (in a message box)<?xml version="1.0"?>
<Node1>test</Node1>

Answer 2

兄弟,为什么我按照你的代码调试会出现下面的错误信息?
--------------------Configuration: FileStream - Win32 Debug--------------------
Compiling...
FileStreamDlg.cpp
d:\microsoft visual studio\myprojects\filestream\filestreamdlg.cpp(4) : warning C4652: compiler option 'Generate Browser Info' inconsistent with precompiled header; current command-line option will override that defined in the precompiled header
D:\Microsoft Visual Studio\MyProjects\FileStream\FileStreamDlg.cpp(285) : error C2664: 'createElement' : cannot convert parameter 1 from 'char [6]' to 'unsigned short *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
D:\Microsoft Visual Studio\MyProjects\FileStream\FileStreamDlg.cpp(288) : error C2664: 'put_text' : cannot convert parameter 1 from 'char [5]' to 'unsigned short *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
D:\Microsoft Visual Studio\MyProjects\FileStream\FileStreamDlg.cpp(292) : error C2664: 'createProcessingInstruction' : cannot convert parameter 1 from 'char [4]' to 'unsigned short *'
        Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Error executing cl.exe.FileStream.exe - 3 error(s), 1 warning(s)