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Articles / Desktop Programming / MFC
Posted 16 Jul 2007


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CXml - A Wrapping Class for MSXML 3.0/4.0/5.0/6.0

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4.99/5 (45 votes)
10 Jan 2013CPOL2 min read
This wrapping class will try to use the latest version of MSXML in the machine, and it is easy because of using auto_ptr.


MSXML, a window component shipped with Windows / Office and other Microsoft products, exists in all Windows platforms. But there are different versions of MSXML, from 2.6 to 6.0, which causes a lot of problems.

This is a wrapping class library for MSXML 3.0/4.0/5.0/6.0 consisting of resolving the above problem -- you don't need to worry about the available MSXML version on different machines any more. Also it provides an easy-to-use interface -- each node in the XML is considered an object and you can use some code like below to locate a node.  


Sample Code

Please find the sample code in the demo project.


Using the Code

Copy all the files in the /CXml/*.* directory and add them into your project.

#include "Xml.h"
using namespace JWXml;

Here, I have added a namespace for the classes, you can change it as you like.

MSXML Version

The class will try to choose the version of MSXML in the following order:

hr = (hr == S_OK) ? hr : m_pDoc.CreateInstance( __uuidof(MSXML2::DOMDocument60) );
hr = (hr == S_OK) ? hr : m_pDoc.CreateInstance( __uuidof(MSXML2::DOMDocument30) );
hr = (hr == S_OK) ? hr : m_pDoc.CreateInstance( __uuidof(MSXML2::DOMDocument50) );
hr = (hr == S_OK) ? hr : m_pDoc.CreateInstance( __uuidof(MSXML2::DOMDocument40) );
hr = (hr == S_OK) ? hr : m_pDoc.CreateInstance( __uuidof(MSXML2::DOMDocument26) );
hr = (hr == S_OK) ? hr : m_pDoc.CreateInstance( __uuidof(MSXML2::DOMDocument) );

Classes Overview


class CXml
    friend class CXsl;


    MSXML2::IXMLDOMDocument2Ptr m_pDoc;
    CString m_strFilePath;
    MSXML_VERSION m_emVersion;
    std::map< CString, CString> m_mpNamespace;

    BOOL CreateInstance(void);

    // Open XML file
    BOOL Open(LPCTSTR lpszXmlFilePath);

    // Create a new XML file
    BOOL Create( LPCTSTR lpszRootName = _T("xmlRoot")
        , LPCTSTR lpszPrefix = _T("")
        , LPCTSTR lpszNamespaceURI = _T("")

    // Load XML string
    BOOL LoadXml(LPCTSTR lpszXmlContent);

    // save XML file
    BOOL Save(LPCTSTR lpszFilePath);

    // save XML file with formatted output
    BOOL SaveWithFormatted(LPCTSTR lpszFilePath = NULL, 
            LPCTSTR lpszEncoding = _T("UTF-8"));

    // close XML file
    void Close(void);

    CString GetXmlFile(void) const;

    // Encode the binary data into string
    CString Base64Encode( LPBYTE pBuf, ULONG ulSize);

    // Decode the string into binary data
    BOOL Base64Decode( CString strIn, LPBYTE pBuf, LONG & lSize);

    // namespace
    void AddSelectionNamespace( LPCTSTR lpszPrefix, LPCTSTR lpszURI);

    // get the root element of
    CXmlNodePtr GetRoot(void);

    // get single node by XPath
    CXmlNodePtr SelectSingleNode(LPCTSTR lpszPath);

    // get nodes by XPath
    CXmlNodesPtr SelectNodes(LPCTSTR lpszPath);

    // create node
    CXmlNodePtr CreateNode(LPCTSTR lpszName
        , LPCTSTR lpszPrefix = _T("")
        , LPCTSTR lpszNamespaceURI = _T("")

    // get the current version of MSXML
    MSXML_VERSION GetVersion(void) const;


class CXmlNode
    friend class CXml;
    friend class CXmlNode;
    friend class CXmlNodes;

    MSXML2::IXMLDOMNodePtr m_pNode;

    CXmlNode( MSXML2::IXMLDOMNodePtr pNode);

    BOOL _GetValue(CString & strValue) const;
    BOOL _SetValue(CString & strValue) const;

    BOOL _GetAttribute( CString & strName, CString & strValue) const;
    BOOL _SetAttribute( CString & strName IN
                      , CString & strValue IN
                      , CString & strPrefix IN
                      , CString & strNamespaceURI IN
                      ) const;


    CXmlNode(const CXmlNode & refNode IN);
    CXmlNode(const CXmlNodePtr pNode IN);

    CXmlNodePtr operator = (CXmlNodePtr pNode);
    CXmlNode & operator = (const CXmlNode & refNode);

    BOOL IsNull(void) const;     // Whether the current element exist
    CString GetName(void) const;// Get the name of the current node
    CXmlNode & Detach(void);    // Detach the current node
    void Release(void);    // Release this node

    CXmlNodePtr GetChild( CString strName, BOOL bBuildIfNotExist = TRUE);
    CXmlNodePtr NewChild( CString strName );
    CXmlNodePtr GetParent(void);
    CXmlNodesPtr GetChildren();
    void AttachChild( CXmlNodePtr & pChildNode);
    void AttachChild( CXmlNode & refChildNode);
    BOOL HasChildren(void);
    BOOL RemoveChildren(void);

    CString    GetAttribute( CString strName, LPCTSTR lpszDefault = NULL) const;
    bool    GetAttribute( CString strName, bool bDefault) const;
    int        GetAttribute( CString strName, int nDefault) const;
    long    GetAttribute( CString strName, long lDefault) const;
    __int64    GetAttribute( CString strName, __int64 llDefault) const;
    float    GetAttribute( CString strName, float fDefault) const;
    double    GetAttribute( CString strName, double dDefault) const;
    DWORD    GetAttribute( CString strName, DWORD dwDefault) const;

    BOOL    SetAttribute( CString strName, LPCTSTR lpszValue ,
            CString strPrefix = _T(""), CString strNamespaceURI = _T(""));
    BOOL    SetAttribute( CString strName, bool bValue ,
            CString strPrefix = _T(""), CString strNamespaceURI = _T(""));
    BOOL    SetAttribute( CString strName, int nValue ,
            CString strPrefix = _T(""), CString strNamespaceURI = _T(""));
    BOOL    SetAttribute( CString strName, long lValue ,
            CString strPrefix = _T(""), CString strNamespaceURI = _T(""));
    BOOL    SetAttribute( CString strName, __int64 llValue ,
            CString strPrefix = _T(""), CString strNamespaceURI = _T(""));
    BOOL    SetAttribute( CString strName, float fValue ,
            CString strPrefix = _T(""), CString strNamespaceURI = _T(""));
    BOOL    SetAttribute( CString strName, double dValue ,
            CString strPrefix = _T(""), CString strNamespaceURI = _T(""));
    BOOL    SetAttribute( CString strName, DWORD dwValue ,
            CString strPrefix = _T(""), CString strNamespaceURI = _T(""));

    BOOL RemoveAttribute( CString strName );

    CString    GetValue( LPCTSTR lpszDefault = NULL ) const;
    bool    GetValue( bool bDefault ) const;
    int        GetValue( int nDefault) const;
    long    GetValue( long lDefault) const;
    __int64    GetValue( __int64 llDefault) const;
    float    GetValue( float fDefault) const;
    double    GetValue( double dDefault) const;
    DWORD    GetValue( DWORD dwDefault) const;

    BOOL    SetValue( LPCTSTR lpszValue );
    BOOL    SetValue( bool bValue );
    BOOL    SetValue( int nValue );
    BOOL    SetValue( long lValue );
    BOOL    SetValue( __int64 llValue );
    BOOL    SetValue( float fValue );
    BOOL    SetValue( double dValue );
    BOOL    SetValue( DWORD dwValue );

    CXmlNodePtr SelectSingleNode(LPCTSTR lpszPath);
    CXmlNodesPtr SelectNodes(LPCTSTR lpszPath);

    CString GetOuterXml(void) const;
    CString GetInnerXml(void) const;


class CXmlNodes
    friend class CXml;
    friend class CXmlNode;
    friend class CXmlNodes;

    CXmlNodes( const CXmlNodes & refNodes );
    CXmlNodes( CXmlNodesPtr pNodes );

    CXmlNodesPtr operator = (CXmlNodesPtr pNodes);
    CXmlNodes & operator = (const CXmlNodes & refNodes);
    CXmlNodePtr operator[] ( LONG lIndex );
    CXmlNodePtr operator[] ( LPCTSTR lpszName );

    LONG GetCount(void);
    void Release(void);

    CXmlNodePtr GetItem( LONG nIndex );
    CXmlNodePtr GetItem( LPCTSTR lpszName );

    CXmlNodes(MSXML2::IXMLDOMNodeListPtr pNodeList);
    MSXML2::IXMLDOMNodeListPtr m_pNodeList;



class CXsl

    // Open XSL file
    BOOL Open(LPCTSTR lpszXslFilePath);

    // close XSL file
    void Close(void);

    // transform to file
    BOOL TransformToFile( CXml & objXml, LPCTSTR lpszFilePath);

    // add a parameter
    BOOL AddParameter( LPCTSTR lpszParamName, LPCTSTR lpszParamValue, 
            LPCTSTR lpszNamespaceURI = NULL);

    MSXML2::IXSLTemplatePtr m_pIXSLTemplate;
    MSXML2::IXMLDOMDocument2Ptr m_pStyleSheet;
    MSXML2::IXSLProcessorPtr m_pIXSLProcessor;


  • v2.0
    • Created: 2007-07-16
  • v2.1
    • Added LoadXml method
    • Added GetVersion method
    • Added const for GetXXX methods
    • Defined ASSERT as ATLASSERT for ATL
    • Defined TRACE as ATLTRACE for ATL
  • V2.2
    • Added the parameter lpszRootName for CXml::Open
    • Removed CXml::GetLastError
    • Added CXml::AddNamespace
    • Added two new overrides for CXml::CreateNode with namespace support
  • V3.0
    • Added another copy constructor for CXmlNode and CXmlNodes
    • Added const modifier for some variables
    • Added CXmlNode::GetInnerXml
    • Added CXmlNode::GetOuterXml
    • Added CXml::Create
    • Changed the MSXML version for Create to 6.0 -> 3.0 -> 5.0 -> 4.0
    • Added namespace support for attributes
    • Added a new class named CXsl
  • V3.1
    • Add method CXml::SaveWithFormatted (Thanks to roel_)
    • Reuse CXml::SaveStreamToFile in CXsl::TransformToFile
    • Add CXsl::AddParameter to allow passing parameters to XSLT
    • Use std::tr1::shared_ptr if exists instead of std::auto_ptr
    • Change namespace from Generic to JWXml 
  • V3.2
    • Bug fix for the Create method usage in demo.
    • Upgrade to VS2010


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


About the Author

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Jerry is from China. He was captivated by computer programming since 13 years old when first time played with Q-Basic.

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Comments and Discussions

QuestionGreat work! Pin
nilaysoft7-Aug-17 20:55
Membernilaysoft7-Aug-17 20:55 
Suggestionreport for memory leak issue. Pin
seoulpunk17-Apr-16 20:14
professionalseoulpunk17-Apr-16 20:14 
GeneralRe: report for memory leak issue. Pin
Member 1186094825-Apr-16 4:03
MemberMember 1186094825-Apr-16 4:03 
Bug求教,出现红色大X Pin
wuxianzhong13-Jul-14 5:59
Memberwuxianzhong13-Jul-14 5:59 
GeneralRe: 求教,出现红色大X Pin
Jerry.Wang17-Sep-14 22:27
MemberJerry.Wang17-Sep-14 22:27 
QuestionMissing some information about Canonilization Pin
KarstenK4-Nov-13 20:57
mveKarstenK4-Nov-13 20:57 
GeneralMy vote of 5 Pin
maplewang22-Jan-13 15:59
Membermaplewang22-Jan-13 15:59 
GeneralMy vote of 5 Pin
skyformat99@gmail.com11-Jan-13 17:55
Memberskyformat99@gmail.com11-Jan-13 17:55 
GeneralRe: My vote of 5 Pin
Jerry.Wang12-Jan-13 13:50
MemberJerry.Wang12-Jan-13 13:50 
GeneralMy vote of 5 Pin
H.Brydon10-Jan-13 8:51
professionalH.Brydon10-Jan-13 8:51 
Question这个项目有人在版本低于6.0的MSXML环境下用过吗? Pin
dothan00925-Feb-12 1:37
Memberdothan00925-Feb-12 1:37 
Question没有一个比较简便的demo么? Pin
yanzhiwei1475-Feb-12 20:47
Memberyanzhiwei1475-Feb-12 20:47 
GeneralMy vote of 5 Pin
jerry_wangjh11-Nov-11 20:39
Memberjerry_wangjh11-Nov-11 20:39 
GeneralMy vote of 5 Pin
tankfun12-Sep-11 23:49
Membertankfun12-Sep-11 23:49 
GeneralRe: My vote of 5 Pin
nilaysoft28-Jul-16 3:51
Membernilaysoft28-Jul-16 3:51 
Generalnew function - GetXML() Pin
Master^Tristar30-Mar-11 19:28
MemberMaster^Tristar30-Mar-11 19:28 
GeneralRe: new function - GetXML() Pin
Jerry.Wang12-Apr-11 18:45
MemberJerry.Wang12-Apr-11 18:45 
GeneralRe: new function - GetXML() Pin
hazywxin226-May-11 5:06
Memberhazywxin226-May-11 5:06 
GeneralMy vote of 5 Pin
Jhomes14-Feb-11 11:21
MemberJhomes14-Feb-11 11:21 
AnswerAdded two new functions: GetAttributeCount Pin
Lars [Large] Werner19-Dec-10 9:49
professionalLars [Large] Werner19-Dec-10 9:49 
Generaland GetAttributeByIndex Pin
Lars [Large] Werner19-Dec-10 9:51
professionalLars [Large] Werner19-Dec-10 9:51 
GeneralRe: and GetAttributeByIndex Pin
Jerry.Wang12-Apr-11 18:48
MemberJerry.Wang12-Apr-11 18:48 
QuestionIf I call _tsplitpath first then call CXmlNode::SetAttribute(strName, lpszValue). It's default parameter will have some value. why? Pin
silvonli15-Nov-10 21:56
Membersilvonli15-Nov-10 21:56 
GeneralGood job, if you provide more sample is better Pin
maplewang26-Oct-10 0:59
Membermaplewang26-Oct-10 0:59 
Question不支持命名空间? Pin
hellohuhu6-Apr-10 23:26
Memberhellohuhu6-Apr-10 23:26 

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