Operate XML in C #

xiaoxiao2021-03-06  117

One XML file is known (bookstore.xml) is as follows:

Oberon's legacy </ title> <author> Corets, EVA </ author> <price> 5.95 </ price> </ book> </ bookstore></p> <p>1. Insert a <book> node into the <BookStore> node:</p> <p>XMLDocument Xmldoc = new xmldocument (); xmldoc.load ("BookStore.xml");</p> <p>XMLNode root = xmldoc.selectsinglenode ("bookstore"); // Find <bookstore> Xmlelement XE1 = Xmldoc.createElement ("BOOK"); // Create a <book> Node Xe1.setttribute ("Genre", "Li Zan Hong") ; // Set the node GENRE attribute XE1.SetaTribute ("ISBN", "2-3631-4"); // Setting the node ISBN property</p> <p>XMLELEMENT XESUB1 = XMLDoc.createElement ("Title"); Xesub1.innerText = "CS From Getting Started to Wen"; // Settings Text Node XE1.AppendChild (Xesub1); // Add to <Book> Node XMLELEMENT XESUB2 = XMLDoc. CreateElement ("author"); Xesub2.innertext = "Waiting"; Xe1.Appendchild (Xesub2); XMLELEMENT XESUB3 = XMLDoc.createElement ("price"); XESUB3.INNERTEXT = "58.3"; XE1.Appendchild (Xesub3);</p> <p>Root.appendchild (xe1); // Add to <BookStore> Node XMLDoc.save ("BookStore.xml");</p> <p>/ / =======================================================================================</p> <p>The result is:</p> <p><? XML Version = "1.0" encoding = "GB2312"?> <bookstore> <book genre = "fantasy" ISBN = "2-3631-4"> <title> Oberon's legacy </ title> <author> Corets, EVA </ author> <price> 5.95 </ price> </ book> <book genre = "李赞红" ISBN = "2-3631-4"> <title> CS from getting started to master </ title> <author> 捷</ author> <price> 58.3 </ price> </ book> </ bookstore> 2, modify the node: Change the GENRE value of the GENRE attribute value "Le Li Zanhong" to "Update Li Zanli", the child of the node The text of the node <author> is modified to "Ya Sheng".</p> <p>XmlNodelist NodeList = XmLDoc.selectsinglenode ("BookStore"). ChildNodes; // Get all child nodes for the BookStore node Foreach (XMLNode Xn In nodelist) // Traverse all child nodes {xmlelement XE = (xmlelement) xn; // Fander node Type Convert to XMLELEMENT Type IF (Xe.GetaTRibute ("Genre") == "Li Zanhong") // If the GENRE attribute value is "Li Zanhong" {xe.setttribute ("genre", "Update Li Zan Hong"); // Modify This attribute is "Update Li Zan Hong"</p> <p>XMLNodelist NLS = XE.ChildNodes; // Continue all child nodes of the XE child node Foreach (XMLNode XN1 in NLS) // Traversed {XMLELEMENT XE2 = (XMLELEMENT) XN1; // Conversion Type IF (Xe2.Name == "AUTHOR ") // If you find {xe2.innerText =" Amazheng "; // modify break; // can be used to find out.}} Break;}}</p> <p>XMLDoc.save ("BookStore.xml"); // Save.</p> <p>/ / =========================================================================================================================================================================================== ==</p> <p>The last result is:</p> <p><? XML Version = "1.0" encoding = "GB2312"?> <bookstore> <book genre = "fantasy" ISBN = "2-3631-4"> <title> Oberon's legacy </ title> <author> Corets, EVA </ author> <price> 5.95 </ price> </ book> <book genre = "Update Li Zanli" ISBN = "2-3631-4"> <title> CS from getting started </ title> <author> Sheng </ author> <price> 58.3 </ price> </ book> </ bookstore> 3, delete <book genre = "fantasy" ISBN = "2-3631-4"> Node GENRE attribute, delete <book genre = "Update Li Zanli" ISBN = "2-3631-4"> node.</p> <p>XMLNodelist XNL = XmLDoc.selectsinglenode ("BookStore"). ChildNodes;</p> <p>Foreach (XMLNode XN IN XNL) {XMLELEMENT XE = (XMLELEMENT) XN; IF (Xe.GetaTribute ("genre") == "fantasy" {xe.removeattribute ("genre"); // Delete Genre attribute} else IF (Xe.GetaTRibute ("genre") == "Update Li Zanli") {xe.removeall (); // Delete the entire content of the node}} Xmldoc.save ("BookStore.xml");</p> <p>/ / =================================================== The final result is:</p> <p><? XML Version = "1.0" encoding = "GB2312"?> <bookstore> <book isbn = "2-3631-4"> <title> Oberon's legacy </ title> <author> corets, evA </ author> < Price> 5.95 </ price> </ book> <book> </ book> </ bookstore></p> <p>4, display all data.</p> <p>XMLNode XN = Xmldoc.selectsinglenode ("BookStore");</p> <p>XMLNodelist XNL = xn.childNodes; Foreach (XMLNode XNF in XNL) {XMLELEMENT XE = (XMLELEMENT) XNF; Console.WriteLine (Xe.GetaTribute ("genre")); // Display attribute value console.writeline (Xe.GetaTRibute "ISBN")); XMLNodelist XNF1 = XE.ChildNodes; Foreach (XMLNode XN2 in Xnf1) {Console.WriteLine (xn2.innerText); // Display sub-node text}}</p></div><div class="text-center mt-3 text-grey"> 转载请注明原文地址:https://www.9cbs.com/read-125722.html</div><div class="plugin d-flex justify-content-center mt-3"></div><hr><div class="row"><div class="col-lg-12 text-muted mt-2"><i class="icon-tags mr-2"></i><span class="badge border border-secondary mr-2"><h2 class="h6 mb-0 small"><a class="text-secondary" href="tag-2.html">9cbs</a></h2></span></div></div></div></div><div class="card card-postlist border-white shadow"><div class="card-body"><div class="card-title"><div class="d-flex justify-content-between"><div><b>New Post</b>(<span class="posts">0</span>) </div><div></div></div></div><ul class="postlist list-unstyled"> </ul></div></div><div class="d-none threadlist"><input type="checkbox" name="modtid" value="125722" checked /></div></div></div></div></div><footer class="text-muted small bg-dark py-4 mt-3" id="footer"><div class="container"><div class="row"><div class="col">CopyRight © 2020 All Rights Reserved </div><div class="col text-right">Processed: <b>0.043</b>, SQL: <b>9</b></div></div></div></footer><script src="./lang/en-us/lang.js?2.2.0"></script><script src="view/js/jquery.min.js?2.2.0"></script><script src="view/js/popper.min.js?2.2.0"></script><script src="view/js/bootstrap.min.js?2.2.0"></script><script src="view/js/xiuno.js?2.2.0"></script><script src="view/js/bootstrap-plugin.js?2.2.0"></script><script src="view/js/async.min.js?2.2.0"></script><script src="view/js/form.js?2.2.0"></script><script> var debug = DEBUG = 0; var url_rewrite_on = 1; var url_path = './'; var forumarr = {"1":"Tech"}; var fid = 1; var uid = 0; var gid = 0; xn.options.water_image_url = 'view/img/water-small.png'; </script><script src="view/js/wellcms.js?2.2.0"></script><a class="scroll-to-top rounded" href="javascript:void(0);"><i class="icon-angle-up"></i></a><a class="scroll-to-bottom rounded" href="javascript:void(0);" style="display: inline;"><i class="icon-angle-down"></i></a></body></html><script> var forum_url = 'list-1.html'; var safe_token = 'UZLGWHuckD1hzb2iih2WYXGNL8Q0wUllPFvv_2B9Vi9YFY6LEIpvTiKV_2FCoC8tKwsPMAMWGoQl7Uxa4N70jMZCVw_3D_3D'; var body = $('body'); body.on('submit', '#form', function() { var jthis = $(this); var jsubmit = jthis.find('#submit'); jthis.reset(); jsubmit.button('loading'); var postdata = jthis.serializeObject(); $.xpost(jthis.attr('action'), postdata, function(code, message) { if(code == 0) { location.reload(); } else { $.alert(message); jsubmit.button('reset'); } }); return false; }); function resize_image() { var jmessagelist = $('div.message'); var first_width = jmessagelist.width(); jmessagelist.each(function() { var jdiv = $(this); var maxwidth = jdiv.attr('isfirst') ? first_width : jdiv.width(); var jmessage_width = Math.min(jdiv.width(), maxwidth); jdiv.find('img, embed, iframe, video').each(function() { var jimg = $(this); var img_width = this.org_width; var img_height = this.org_height; if(!img_width) { var img_width = jimg.attr('width'); var img_height = jimg.attr('height'); this.org_width = img_width; this.org_height = img_height; } if(img_width > jmessage_width) { if(this.tagName == 'IMG') { jimg.width(jmessage_width); jimg.css('height', 'auto'); jimg.css('cursor', 'pointer'); jimg.on('click', function() { }); } else { jimg.width(jmessage_width); var height = (img_height / img_width) * jimg.width(); jimg.height(height); } } }); }); } function resize_table() { $('div.message').each(function() { var jdiv = $(this); jdiv.find('table').addClass('table').wrap('<div class="table-responsive"></div>'); }); } $(function() { resize_image(); resize_table(); $(window).on('resize', resize_image); }); var jmessage = $('#message'); jmessage.on('focus', function() {if(jmessage.t) { clearTimeout(jmessage.t); jmessage.t = null; } jmessage.css('height', '6rem'); }); jmessage.on('blur', function() {jmessage.t = setTimeout(function() { jmessage.css('height', '2.5rem');}, 1000); }); $('#nav li[data-active="fid-1"]').addClass('active'); </script>