38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync<html><head><meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"><title>Writing element content</title><meta name="generator" content="DocBook XSL Stylesheets V1.61.2"><link rel="home" href="index.html" title="Libxml Tutorial"><link rel="up" href="index.html" title="Libxml Tutorial"><link rel="previous" href="ar01s05.html" title="Using XPath to Retrieve Element Content"><link rel="next" href="ar01s07.html" title="Writing Attribute"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Writing element content</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ar01s05.html">Prev</a>�</td><th width="60%" align="center">�</th><td width="20%" align="right">�<a accesskey="n" href="ar01s07.html">Next</a></td></tr></table><hr></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="xmltutorialwritingcontent"></a>Writing element content</h2></div></div><div></div></div><p><a class="indexterm" name="id2586968"></a>
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync Writing element content uses many of the same steps we used above
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync — parsing the document and walking the tree. We parse the document,
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync then traverse the tree to find the place we want to insert our element. For
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync this example, we want to again find the "storyinfo" element and
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync this time insert a keyword. Then we'll write the file to disk. Full code:
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync <a href="ape.html" title="E.�Code for Add Keyword Example">Appendix�E, <i>Code for Add Keyword Example</i></a></p><p>
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync The main difference in this example is in
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsyncparseStory (xmlDocPtr doc, xmlNodePtr cur, char *keyword) {
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync <a name="addkeyword"></a><img src="images/callouts/1.png" alt="1" border="0"> xmlNewTextChild (cur, NULL, "keyword", keyword);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync </p><div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><a href="#addkeyword"><img src="images/callouts/1.png" alt="1" border="0"></a> </td><td valign="top" align="left"><p>The <tt class="function"><a href="http://xmlsoft.org/html/libxml-tree.html#XMLNEWTEXTCHILD" target="_top">xmlNewTextChild</a></tt>
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync function adds a new child element at the
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync current node pointer's location in the
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync tree, specified by <tt class="varname">cur</tt>.</p></td></tr></table></div><p>
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync Once the node has been added, we would like to write the document to
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync file. Is you want the element to have a namespace, you can add it here as
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync well. In our case, the namespace is NULL.
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync xmlSaveFormatFile (docname, doc, 1);
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync The first parameter is the name of the file to be written. You'll notice
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync it is the same as the file we just read. In this case, we just write over
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync the old file. The second parameter is a pointer to the xmlDoc
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync structure. Setting the third parameter equal to one ensures indenting on output.
38ae7e4efe803ea78b6499cd05a394db32623e41vboxsync </p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ar01s05.html">Prev</a>�</td><td width="20%" align="center"><a accesskey="u" href="index.html">Up</a></td><td width="40%" align="right">�<a accesskey="n" href="ar01s07.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Using XPath to Retrieve Element Content�</td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top">�Writing Attribute</td></tr></table></div></body></html>