Create and read XML files in C #

In the project, you need to save the information on the front-end page and store it as an XML file to the database. Therefore, I will first use a small instance to learn how to create and read XML.

Part of reference http://blog.csdn.net/lengjing126/archive/2009/08/12/4438042.aspx

1. Create a simple XML file

To facilitate testing, we first create a console applicationProgramProject name: createxml, program. CSCodeAs follows:

Using system; <br/> using system. collections. generic; <br/> using system. LINQ; <br/> using system. text; <br/> using system. XML; </P> <p> namespace createxml <br/> {<br/> class Program <br/> {<br/> static void main (string [] ARGs) <br/>{< br/> program APP = new program (); <br/> app. createxmlfile (); <br/>}< br/> Public void createxmlfile () <br/>{< br/> xmldocument xmldoc = new xmldocument (); <br/> // create a type declaration node <br/> xmlnode node = xmldoc. createxmldeclaration ("1.0", "UTF-8", ""); <br/> xmldoc. appendchild (node); <br/> // create a root node <br/> xmlnode root = xmldoc. createelement ("user"); <br/> xmldoc. appendchild (Root); <br/> createnode (xmldoc, root, "name", "xuwei"); <br/> createnode (xmldoc, root, "sex ", "male"); <br/> createnode (xmldoc, root, "Age", "25"); <br/> try <br/>{< br/> xmldoc. save ("C: // data2.xml"); <br/>}< br/> catch (exception E) <br/> {<br/> // Display Error Information <br/> console. writeline (E. message); <br/>}< br/> // console. readline (); </P> <p >}</P> <p> // <summary> <br/> // create a node <br/> // </Summary> <br/> /// <Param name = "xmldoc"> </param> XML document <br/> /// <Param name = "parentnode"> </Param> parent node <br/> /// <Param name = "name"> </param> node name <br/> /// <Param name = "value"> </param> node value <br/> /// <br/> Public void createnode (xmldocument xmldoc, xmlnode parentnode, string name, string value) <br/>{< br/> xmlnode node = xmldoc. createnode (xmlnodetype. element, name, null); <br/> node. innertext = value; <br/> parentnode. appendchild (node); <br/>}< br/>

In this case, the data2.xml file is created under the root directory of the C drive. The file content is

<? XML version = "1.0" encoding = "UTF-8"?> <Br/> <user> <br/> <Name> xuwei </Name> <br/> <sex> male </sex> <br/> <age> 25 </age> <br/> </user>

2. Create multi-node, multi-level XML files

You only need to modify the createxmlfile () method as follows:

Public void createxmlfile () <br/>{< br/> xmldocument xmldoc = new xmldocument (); <br/> // create a type declaration node <br/> xmlnode node = xmldoc. createxmldeclaration ("1.0", "UTF-8", ""); <br/> xmldoc. appendchild (node); <br/> // create a root node <br/> xmlnode root = xmldoc. createelement ("users"); <br/> xmldoc. appendchild (Root); </P> <p> xmlnode node1 = xmldoc. createnode (xmlnodetype. element, "user", null); <br/> createnode (xmldoc, node1, "name", "xuwei"); <br/> createnode (xmldoc, node1, "Sex", "male"); <br/> createnode (xmldoc, node1, "Age", "25"); <br/> root. appendchild (node1); </P> <p> xmlnode node2 = xmldoc. createnode (xmlnodetype. element, "user", null); <br/> createnode (xmldoc, node2, "name", "xiaolai"); <br/> createnode (xmldoc, node2, "Sex", "female"); <br/> createnode (xmldoc, node2, "Age", "23"); <br/> root. appendchild (node2); </P> <p> try <br/> {<br/> xmldoc. save ("C: // data5.xml"); <br/>}< br/> catch (exception E) <br/> {<br/> // Display Error Information <br/> console. writeline (E. message); <br/>}< br/> // console. readline (); </P> <p>}

The generated XML file is as follows:

<? XML version = "1.0" encoding = "UTF-8"?> <Br/> <users> <br/> <user> <br/> <Name> xuwei </Name> <br/> <sex> male </sex> <br /> <age> 25 </age> <br/> </user> <br/> <Name> xiaolai </Name> <br/> <sex> female </sex> <br/> <age> 23 </age> <br/> </user> <br/> </users>