C # Summary of basic XML operations

C # basic XML operations include reading node data and adding nodes. Read node attributes and modify node attributes. The details are as follows:

XML file: The file is in the mydocument folder.

 
<? XML version = "1.0" encoding = "UTF-8"?> <Personf xmlns = "" name = "(TEST) Work Hard Work smart! "> <Person name =" person1 "> <ID> 1 </ID> <Name> xiaoa </Name> <age> 59 </age> </person> <person name = "person2"> <ID> 2 </ID> <Name> xiaob </Name> <age> 29 </age> </person> <person name = "person3 "> <ID> 3 </ID> <Name> xiaoc </Name> <age> 103 </age> </person> <person name =" person4 "> <ID> 4 </ID> <Name> xiaod </Name> <age> 59 </age> </person> </personf>
 

Code: The description is in the comments.

Public void testxml () {xmldocument Doc = new xmldocument (); string Path = "http://www.cnblogs.com/MyDocument/Person.xml"; try {// Doc. load (server. mappath () Doc. load (PATH); // 1. Read the data of a single node xmlnode node = Doc. selectsinglenode ("personf"); // 2. read data from multiple nodes xmlnodelist nodelist1 = Doc. selectnodes ("personf/person"); // 3.1 read the specific value of a specific node, for example, innertext xmlnodelist nodelist = Doc. documentelement. Getelementsbytagname ("person"); foreach (xmlnode node2 in nodelist1) // Of course, the value of nodelist can also be used {If (node2.attributes ["name"]. innertext = "person2") {console. writeline (node2.childnodes [1]. innertext) ;}}// 3.2 read the innertext xmlnode node3 = Doc. selectsinglenode ("personf/person [ID = 2]"); string strnode3 = node3.childnodes [1]. innertext; // 3.3 Use the following method to find the node xmlnodelist nodelist2 = doc with ID 2. s Electnodes ("// person // ID"); xmlnode node4 = NULL; foreach (xmlnode node5 in nodelist2) {If (node5.innertext = "2") {node4 = node5; break;} console. writeline (node4.innertext); // 4. Read the node attribute string name = node. attributes ["name"]. innertext; // 5 modify node attributes. attributes ["name"]. innertext = "Work hard work smart! "; Doc. save (PATH); // 6 Add the custom node xmltextreader reader = new xmltextreader (PATH); xmlelement root = Doc. documentelement; // get the root node xmlelement tagouter = Doc. createelement ("person"); // sets the node attribute tagouter. setattribute ("name", "person5"); xmlelement tagin_name = Doc. createelement ("name"); xmlelement tagin_id = Doc. createelement ("ID"); tagin_name.innertext = "Work hard work smart! "; Tagin_id.innertext =" 32 "; tagouter. appendchild (tagin_name); tagouter. appendchild (tagin_id); root. appendchild (tagouter); // Add tagouter to the last reader of the XML file. close (); Doc. save (PATH);} catch (system. exception e) {Throw new exception (E. message );}}

The following describes the specific operations on XML in C #.

How to read and write XML documents in. net

C # operating XML selectnodes, selectsinglenode always returns NULL and XPath Introduction

C # Use selectsinglenode to parse XML files with multiple namespaces