如何读写，解析xml格式的文件。 - VC++/MFC - C++论坛

得分:6

使用MSXML.DLL读写XML;

文件顶部加入

#import "msxml3.dll";

using namespace MSXML2;

//这两句作用是,在程序的文件夹下生成MSXML3.TLH和MSXML3.TLI两个文件;

---------------------------------------------------------

创建一个XML文件;

::CoInitialize(NULL);
MSXML2::IXMLDOMDocumentPtr XMLDOC;
MSXML2::IXMLDOMElementPtr XMLROOT;

HRESULT HR = XMLDOC.CreateInstance(_uuidof(MSXML2::DOMDocument30));
if(!SUCCEEDED(HR))
{
  MessageBox("faild!!");
  return;
}
XMLROOT = XMLDOC->createElement("ROOT");
XMLROOT->setAttribute("ID","12345");  //设置根标签的属性;
XMLDOC->appendChild(XMLROOT);
CString TMP;
MSXML2::IXMLDOMElementPtr XMLNODE;
for(int I=0;I<10;I++)
{
  TMP.Format("%d",I);
  XMLNODE = XMLDOC->createElement((_bstr_t)("NODE"+TMP));
  XMLNODE->put_text((_bstr_t)"NODETEXTS");//设置标签的文本内容;
  XMLNODE->setAttribute("ID",(_variant_t)TMP);//设置标签的属性及内容;
  XMLNODE->setAttribute("NAME","NODENAME");
  XMLROOT->appendChild(XMLNODE);
}
XMLDOC->save("XMLTEST.XML");
XMLNODE.Release();
XMLROOT.Release();
XMLDOC.Release();
::CoUninitialize();

------------------------------------------------------------------

读取一个XML;

::CoInitialize(NULL);
MSXML2::IXMLDOMDocumentPtr XMLDOC;
MSXML2::IXMLDOMElementPtr XMLROOT;
MSXML2::IXMLDOMElementPtr XMLELEMENT;
MSXML2::IXMLDOMNodeListPtr XMLNODES; //某个节点的所以字节点
MSXML2::IXMLDOMNamedNodeMapPtr XMLNODEATTS;//某个节点的所有属性;
MSXML2::IXMLDOMNodePtr XMLNODE;
HRESULT HR = XMLDOC.CreateInstance(_uuidof(MSXML2::DOMDocument30));
if(!SUCCEEDED(HR))
{
  MessageBox("faild!!");
  return;
}
XMLDOC->load("XMLTEST.XML");
XMLROOT = XMLDOC->GetdocumentElement();//获得根节点;
XMLROOT->get_childNodes(&XMLNODES);//获得根节点的所有子节点;
long XMLNODESNUM,ATTSNUM;
XMLNODES->get_length(&XMLNODESNUM);//获得所有子节点的个数;
CString TMP;
TMP.Format("%d",XMLNODESNUM);
MessageBox(TMP);
for(int I=0;I<XMLNODESNUM;I++)
{
  XMLNODES->get_item(I,&XMLNODE);//获得某个子节点;
  XMLNODE->get_attributes(&XMLNODEATTS);//获得某个节点的所有属性;
  XMLNODEATTS->get_length(&ATTSNUM);//获得所有属性的个数;
  for(int J=0;J<ATTSNUM;J++)
  {
   XMLNODEATTS->get_item(J,&XMLNODE);//获得某个属性;
   CString T1 = (char*)(_bstr_t)XMLNODE->nodeName;
   CString T2 = (char*)(_bstr_t)XMLNODE->text;
   MessageBox(T1+" = "+T2);
  }
  //MessageBox((_bstr_t)XMLNODE->nodeName+": "+(_bstr_t)XMLNODE->text);
}
return;
//XMLDOC->save("XMLTEST.XML");
XMLNODES.Release();
XMLNODE.Release();
XMLROOT.Release();
XMLDOC.Release();
::CoUninitialize();

---------------------------------------------------------

总结:

XML文件档类型:MSXML2::IXMLDOMDocumentPtr;

单个元素类型:MSXML2::IXMLDOMElementPtr;

单个节点类型:MSXML2::IXMLDOMNodePtr;

所有子节点类型:MSXML2::IXMLDOMNodeListPtr;

所有属性类型:MSXML2::IXMLDOMNamedNodeMapPtr;

获得节点个数的方法:get_length();

获得所有子节点的方法:get_childNodes();

获得指定节点的方法:get_item(索引号,单个节点类型变量);

写入单个节点的文本内容方法:put_text((_bstr_t)"内容");

获得单个节点的文本内容属性:XMLNODE->text;

获得单个属性的内容属性:XMLNODEATT->text;

节点名的属性为:XMLNODE->nodeName;

---------------------------------------------------------------

XML创建文件一般过程:

::CoInitialize(NULL);

HRESULT HR = XMLDOC.CreateInstance(_uuidof(MSXML2::DOMDocument30));
if(!SUCCEEDED(HR))
{
  MessageBox("faild!!");
  return;
}
XMLROOT = XMLDOC->createElement("ROOT");//创建文件;

操作文件.....................

XMLDOC->save("XMLTEST.XML");//保存文件;
XMLNODE.Release();
XMLROOT.Release();
XMLDOC.Release();
::CoUninitialize();

------------------------------------------------------------------------------

加载文件过程序:

::CoInitialize(NULL);
HRESULT HR = XMLDOC.CreateInstance(_uuidof(MSXML2::DOMDocument30));
if(!SUCCEEDED(HR))
{
  MessageBox("faild!!");
  return;
}
XMLDOC->load("XMLTEST.XML");

文件操作.........................

XMLDOC->save("XMLTEST.XML");//可以保存对文件的修改;
XMLNODES.Release();
XMLNODE.Release();
XMLROOT.Release();
XMLDOC.Release();
::CoUninitialize();

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