DOM解析非默认命名空间xml文件时，selectSingleNode返回0，求大侠相助

yanxiaofang0504 2012-05-14 01:11:30

利用dom解析一个xml文件，我想获取\Model\packagedElement 路径下“name”属性值为“dinggou”的ownedAttribute节点，可是利用selectSingleNode（）返回的总是0，这是为啥呢？
要解析的xml如下：

  <?xml version="1.0" encoding="UTF-8" ?> 

- <uml:Model xmi:version="2.1" xmlns:xmi="http://schema.omg.org/spec/XMI/2.1" xmlns:uml="http://www.eclipse.org/uml2/2.1.0/UML" xmi:id="_kkgsMBeLEd60N8ipLbB6nA" name="Atmosphere">

- <packagedElement xmi:type="uml:Class" xmi:id="_0Ot84JwMEeGMlsuVTnw_dg" name="Atmosphere">

  <ownedAttribute xmi:id="_0Sb_QJwMEeGMlsuVTnw_dg" name="_isTarget" visibility="private" isStatic="true" type="_0TB1IJwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0TB1IZwMEeGMlsuVTnw_dg" name="dinggou" visibility="public" type="_0TehEJwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0TLmIJwMEeGMlsuVTnw_dg" name="fabu" visibility="public" type="_0UOH8JwMEeGMlsuVTnw_dg" /> 

  </packagedElement>

  <packagedElement xmi:type="uml:PrimitiveType" xmi:id="_0TB1IJwMEeGMlsuVTnw_dg" name="bool" /> 

- <packagedElement xmi:type="uml:Class" xmi:id="_0TehEJwMEeGMlsuVTnw_dg" name="LocationData">

  <ownedAttribute xmi:id="_0ToSEJwMEeGMlsuVTnw_dg" name="longitude" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0ToSEpwMEeGMlsuVTnw_dg" name="latitude" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0TxcAJwMEeGMlsuVTnw_dg" name="height" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0TxcAZwMEeGMlsuVTnw_dg" name="position_ang" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0T7NAJwMEeGMlsuVTnw_dg" name="pitch_ang" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0T7NAZwMEeGMlsuVTnw_dg" name="roll_ang" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  </packagedElement>

  <packagedElement xmi:type="uml:PrimitiveType" xmi:id="_0ToSEZwMEeGMlsuVTnw_dg" name="double" /> 

- <packagedElement xmi:type="uml:Class" xmi:id="_0UOH8JwMEeGMlsuVTnw_dg" name="AtmData">

  <ownedAttribute xmi:id="_0UX48JwMEeGMlsuVTnw_dg" name="wind" visibility="public" type="_0Uz90JwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0UX48ZwMEeGMlsuVTnw_dg" name="temprature" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0UhC4JwMEeGMlsuVTnw_dg" name="cloud" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0UhC4ZwMEeGMlsuVTnw_dg" name="fog" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0Uqz4JwMEeGMlsuVTnw_dg" name="visibility" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  </packagedElement>

- <packagedElement xmi:type="uml:Class" xmi:id="_0Uz90JwMEeGMlsuVTnw_dg" name="wind">

  <ownedAttribute xmi:id="_0U9u0JwMEeGMlsuVTnw_dg" name="wind_u" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0VHf0JwMEeGMlsuVTnw_dg" name="wind_v" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  <ownedAttribute xmi:id="_0VHf0ZwMEeGMlsuVTnw_dg" name="wind_w" visibility="public" type="_0ToSEZwMEeGMlsuVTnw_dg" /> 

  </packagedElement>

  </uml:Model>

我编写的selectSingleNode段的代码如下：

	MSXML2::IXMLDOMDocument2Ptr pXMLDom;

	HRESULT hr;

	CoInitialize(NULL);



	hr = pXMLDom.CreateInstance(__uuidof(MSXML2::DOMDocument));

	if (FAILED(hr))

	{

		printf("Failed to CreateInstance on an XML DOM");

		return;

	}



	VARIANT_BOOL  isSuccessFul=pXMLDom->load(atmFileName);

	MSXML2::IXMLDOMNodePtr pNode;

	if (isSuccessFul==VARIANT_TRUE)

	{

		pXMLDom->setProperty("SelectionLanguage","XPath");

		pXMLDom->setProperty("SelectionNamespaces","xmlns:uml='http://www.eclipse.org/uml2/2.1.0/UML' xmlns:xmi='http://schema.omg.org/spec/XMI/2.1'");



		pNode=pXMLDom->selectSingleNode(L"/Model/packagedElement/ownedAttribute[@name='dinggou']");

	}