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Tue Jun 4 09:09:18 MDT 2002 John Fleck <jfleck@inkstain.net> * added doc/tutorial, including: apa.html apb.html apc.html apd.html ar01s02.html ar01s03.html ar01s04.html ar01s05.html ar01s06.html includeaddattribute.c includeaddkeyword.c includekeyword.c includestory.xml index.html xmltutorial.xml libxml tutorial, including generated html
35 lines
3.6 KiB
HTML
35 lines
3.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html><head><meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"><title>Writing element content</title><meta name="generator" content="DocBook XSL Stylesheets V1.48"><link rel="home" href="index.html" title="Libxml Tutorial"><link rel="up" href="index.html" title="Libxml Tutorial"><link rel="previous" href="ar01s04.html" title="Retrieving Element Content"><link rel="next" href="ar01s06.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="ar01s04.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="ar01s06.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><h2 class="title" style="clear: both"><a name="xmltutorialwritingcontent"></a>Writing element content</h2></div></div><p>Writing element content uses many of the same steps we used above
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— parsing the document and walking the tree. We parse the document,
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then traverse the tree to find the place we want to insert our element. For
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this example, we want to again find the "storyinfo" element and
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this time insert a keyword. Then we'll write the file to disk. Full code:
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<a href="apc.html" title="C. Code for Add Keyword Example">Appendix C</a></p><p>
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The main difference in this example is in
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<tt>parseStory</tt>:
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<pre class="programlisting">
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void
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parseStory (xmlDocPtr doc, xmlNodePtr cur, char *keyword) {
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<a name="addkeyword"></a><img src="images/callouts/1.png" alt="1" border="0"> xmlNewTextChild (cur, NULL, "keyword", keyword);
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return;
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}
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</pre>
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<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><a href="http://xmlsoft.org/html/libxml-tree.html#XMLNEWTEXTCHILD" target="_top">xmlNewTextChild</a></tt>
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function adds a new child element at the
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current node pointer's location in the
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tree, specificied by <tt>cur</tt>.</p></td></tr></table></div>
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</p><p>
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Once the node has been added, we would like to write the document to
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file. Is you want the element to have a namespace, you can add it here as
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well. In our case, the namespace is NULL.
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<pre class="programlisting">
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xmlSaveFormatFile (docname, doc, 1);
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</pre>
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The first parameter is the name of the file to be written. You'll notice
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it is the same as the file we just read. In this case, we just write over
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the old file. The second parameter is a pointer to the xmlDoc
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structure. Setting the third parameter equal to one ensures indenting on output.
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</p></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ar01s04.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="ar01s06.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Retrieving 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>
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