Vc msxml getting started with XML operations

Recently I have some interest in XML. I want to take a look at it a little. Baidu wrote related articles and tried to write a program to record it for asset preparation.

My development environment: win7 32-bit OS and vs2012.

OK.

PS: As for related theories and so on, let the great fairy heroes worry about it. I will stick to the principles and use them.

Start Visual Studio 2012.

[File] → [new] → [project]

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Create an "mfcxmltest" MFC project. [OK]

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[Next]

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Select "based on the dialog box" to cancel "use Unicode library ". Can be directly [completed]

PS: Unicode does not support Chinese very well.

After the warm-up is completed, start to enter the topic.

First draw a simple program interface.

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Added Chinese characters to test whether Chinese characters are supported.

Control attributes:

Control ID	Variable type	Variable name
Idc_edit_id	Cstring	M_strid
Idc_edit_book	Cstring	M_strbook
Idc_edit_author	Cstring	M_strauthor
Idc_button_generate	Generate xml
Idc_button_load	Load XML

Enter the code writing stage.

Introduce the dynamic link library msxml6.dll (C:/Windows/system32/msxml6.dll) in stdafx. h)

You can add the following at the end of the file:

// Msxml6 is provided in win7. For different operating systems, follow the corresponding version or install # import <msxml6.dll>.

Double-click the "generate xml" button to complete the following code:

// Button: Generate xmlvoid cmfcxmltestdlg: onbnclickedbuttongenerate () {// todo: add the control notification handler code updatedata (true) here; msxml2: ixmldomdocumentptr pdoc; // XML document msxml2: ixmldomelementptr xmlroot; // root node msxml2: ixmldomelementptr pelement, pelement1; // element msxml2: ixmldomnodeptr pnode = NULL; // node msxml2 :: ixmldomprocessinginstructionptr pproinstruction = NULL; // XML declaration // create a domdocument object hresult hR = pdoc. createinstance (_ uuidof (Msxml2: domdocument60); // If (! Succeeded (HR) {MessageBox ("The domdocument object cannot be created. Check whether the ms xml Parser Runtime library is installed! "); Return;} // create an XML document Declaration: <? XML version = "1.0" encoding = "UTF-8"?> Pproinstruction = pdoc-> createprocessinginstruction (_ bstr_t) (char *) "XML", (_ bstr_t) (char *) "version = \" 1.0 \ "encoding = \" UTF-8 \ ""); pdoc-> appendchild (pproinstruction); // The root node name is: library xmlroot = pdoc-> createelement (_ bstr_t) ""); pdoc-> putrefdocumentelement (xmlroot);/* -------- running result -------- <? XML version = "1.0" encoding = "UTF-8"?> <Library> <book id = "321"> <book name> bookname </book name> <author> bookauthor </author> </book> </library> * // Node the name of is bookpelement = pdoc-> createelement (_ bstr_t) "book"); // set the property pelement-> setattribute ("ID", (const char *) m_strid); xmlroot-> appendchild (pelement ); // Add the "title" element pelement1 = pdoc-> createelement (_ bstr_t) ""); pelement1-> puttext (_ bstr_t) (const char *) m_strbook ); pelement-> appendchild (pelement1); // Add the "author" element Pel Ement1 = pdoc-> createelement ("author"); pelement1-> puttext (const char *) m_strauthor); pelement-> appendchild (pelement1 ); /* -------- running result -------- <library> <book> <ID> 123 </ID> <title> bookname </title> <author> bookauthor </author> </book> </library> // Add the "book" Node pnode = pdoc-> createnode (_ variant_t) (long) node_element, (_ bstr_t) (char *) "book", (_ bstr_t) (char *) ""); xmlroot-> appendchild (pnode ); // Add the "ID" element pelement = pdoc-> crea Teelement (_ bstr_t) "ID"); pelement-> puttext (_ bstr_t) (const char *) m_strid); pnode-> appendchild (pelement ); // Add the "title" element pelement = pdoc-> createelement (_ bstr_t) ""); pelement-> puttext (_ bstr_t) (const char *) m_strbook ); pnode-> appendchild (pelement); // Add the "author" element pelement = pdoc-> createelement ("author"); pelement-> puttext (const char *) m_strauthor ); pnode-> appendchild (pelement); * // save it File. If it does not exist, it is created. If it exists, it overwrites pdoc-> Save ("D: // book. xml ");}

Double-click the "load XML" button to complete the following code:

// Button: Load xmlvoid cmfcxmltestdlg: onbnclickedbuttonload () {// todo: add the control notification handler code here/* -------- XML content -------- <? XML version = "1.0" encoding = "UTF-8"?> <Library> <book id = "321"> <book name> bookname </book name> <author> bookauthor </author> </book> </library> * // clear control content m_strid.empty (); m_strbook.empty (); m_strauthor.empty (); updatedata (false); // variable value-> control display msxml2: ixmldomdocumentptr pdoc; hresult hr; HR = pdoc. createinstance (_ uuidof (msxml2: domdocument60); If (failed (HR) {MessageBox ("The domdocument object cannot be created. Check whether the ms xml Parser Runtime library is installed! "); Return;} // load the file pdoc-> load (" D: // book. XML "); // select the content's root node msxml2: ixmldomelementptr pelem = NULL; pelem = pdoc-> selectsinglenode (" // library "); If (pelem = NULL) {return;} // search for the number of "books" in "library" (only one in this example) int nbooknum = pelem-> childnodes-> length; If (nbooknum = 0) {return;} // traverse all bookfor (INT I = 0; I <nbooknum; I ++) {msxml2 :: ixmldomnodeptr pbooknode = pelem-> childnodes-> item [I]; If (pbooknode = NULL) {return ;}// read the "ID" attribute msxml2 of the book node :: ixmldomnodeptr pid = pbooknode-> attributes-> getnameditem ("ID"); m_strid = (lpctstr) PID-> text; // type conversion _ bstr_t → cstring // read the "Name of the book" subnode msxml2: ixmldomnodeptr pbook = pbooknode-> selectsinglenode ("name") under the book node "); if (pbook = NULL) {// cout <"Author: Error \ t";} else {m_strbook = (lpctstr) pbook-> text ;} // read the "author" subnode msxml2: ixmldomnodeptr pauthor = pbooknode-> selectsinglenode ("author"); If (pauthor = NULL) under the book Node) {// cout <"Author: Error \ t";} else {m_strauthor = (lpctstr) pauthor-> text ;}// for (INT I = 0; I <nbooknum; I ++) updatedata (false );}

It's an exciting final moment!

Press F7 to generate the program. If everything goes well, press F5 to start.

Running Effect

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\ (Too many rows )/~ La la 650) This. width = 650; "src =" http://img.baidu.com/hi/tsj/t_0003.gif "alt =" t_0003.gif "/>

I encountered an exception during debugging:

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The version of MSXML is not changed to msxml6 on your computer. I hope you will pay attention to it.

PS: Thanks for the help of many netizens!

Http://blog.csdn.net/max2008/article/details/1647613

Http://www.newxing.com/Tech/Program/Cpp/703.html

Http://www.cnblogs.com/xiaoyusmile/p/3920075.html

This article is from the "xingziying" blog, please be sure to keep this source http://xingziying.blog.51cto.com/9815611/1602161

Vc msxml getting started with XML operations