| Chapter 2: Add records to existing XML files You can add nodes and attributes according to the XML structure. In the test, we assume that the original XML file is as follows: <textarea class="code" name="code" rows="10" cols="80"><? XML version = "1.0" encoding = "gb2312"?> <Br/> <users> <br/> <user id = "1"> <br/> <username> outrace </username> <br/> <userpass> mypass </userpass> <br/> </user> <br/> <user id = "2"> <br/> <username> trace </username> <br/> <userpass> mypass </userpass> <br/> </user> <br/> </users> <br/></textarea> The following Code Write operations<% @ Import namespace = "system. io "%> <br/> <% @ import namespace =" system. XML "%> <br/> <script language =" C # "DEBUG =" true "runat =" server "> <br/> Public void page_load (Object SRC, eventargs e) <br/>{< br/>/* <br/> * copyright: copyright by sem it department <br/> * version: version 0.0.1 <br/> * file: insertxml_1.aspx <br/> * usage: Add a record to XML <br/> * Author: ouyang yuntian @ 2005-4-7 <br/> * mailbox: outrace@soueast-motor.com <br/> * Modify: <br/> */</P> <p> string filename; </P> <p> filename = "users_1.xml "; </P> <p> try <br/> {<br/> // create an xml dom <br/> xmldocument Doc = new xmldocument (); </P> <p> // read the XML file <br/> Doc. load (server. mappath (". /files/") + filename); </P> <p> // create a node. <Br/> xmlelement newuser = Doc. createelement ("user"); </P> <p> // create an attribute and place the Secondary attribute under the contact "newuser" <br/> xmlattribute newid = Doc. createattribute ("ID"); <br/> newid. innertext = "3"; <br/> newuser. setattributenode (newid); </P> <p> // create a node and use it as a subnode of "newuser" <br/> xmlelement newusername = Doc. createelement ("username"); <br/> newusername. innertext = "New User Name"; <br/> newuser. appendchild (newusername); </P> <p> // create a node and use it as a subnode of "newuser" <br/> xmlelement newuserpass = Doc. createelement ("userpass"); <br/> newuserpass. innertext = "new password"; <br/> newuser. appendchild (newuserpass); </P> <p> // place the node "newuser" under the root node and save it <br/> Doc. documentelement. appendchild (newuser); <br/> Doc. save (server. mappath (". /files/") + filename); // my files are stored in the file folder in the same directory <br/>}< br/> catch (exception ex) <br/> {<br/> response. write (ex. message ); <br/>}< br/> finally <br/>{< br/>}< br/> </SCRIPT> </P> <p> <HTML> </P> <p> <pead> <br/> <title> insert a data entry </title> <br/> </pead> </P> <p> <body> <br/> <form runat = "server"> <br/> <B> the XML data is successfully written, file Content: </B> <br/> <p> <asp: XML id = "myuser" documentsource = ". /files/users_1.xml "runat =" server "/> </P> <br/> </form> <br/> </body> </P> <p> </ptml> <br/> |
| through the above operation, we will get the following XML results: <? XML version = "1.0" encoding = "gb2312"?> <Br/> <users> <br/> <user id = "1"> <br/> <username> outrace </username> <br/> <userpass> mypass </userpass> <br/> </user> <br/> <user id = "2"> <br/> <username> trace </username> <br/> <userpass> mypass </userpass> <br/> </user> <br/> <user id = "3"> <br/> <username> New User Name </username> <br/> <userpass> New Password </userpass> <br/> </user> <br/> </users> <br/> |
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