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1.1 misho 1: <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>
2: Writing element content uses many of the same steps we used above
3: — parsing the document and walking the tree. We parse the document,
4: then traverse the tree to find the place we want to insert our element. For
5: this example, we want to again find the "storyinfo" element and
6: this time insert a keyword. Then we'll write the file to disk. Full code:
7: <a href="ape.html" title="E. Code for Add Keyword Example">Appendix E, <i>Code for Add Keyword Example</i></a></p><p>
8: The main difference in this example is in
9: <tt class="function">parseStory</tt>:
10:
11: </p><pre class="programlisting">
12: void
13: parseStory (xmlDocPtr doc, xmlNodePtr cur, char *keyword) {
14:
15: <a name="addkeyword"></a><img src="images/callouts/1.png" alt="1" border="0"> xmlNewTextChild (cur, NULL, "keyword", keyword);
16: return;
17: }
18: </pre><p>
19: </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>
20: function adds a new child element at the
21: current node pointer's location in the
22: tree, specified by <tt class="varname">cur</tt>.</p></td></tr></table></div><p>
23: </p><p>
24: <a class="indexterm" name="id2587052"></a>
25: Once the node has been added, we would like to write the document to
26: file. Is you want the element to have a namespace, you can add it here as
27: well. In our case, the namespace is NULL.
28: </p><pre class="programlisting">
29: xmlSaveFormatFile (docname, doc, 1);
30: </pre><p>
31: The first parameter is the name of the file to be written. You'll notice
32: it is the same as the file we just read. In this case, we just write over
33: the old file. The second parameter is a pointer to the xmlDoc
34: structure. Setting the third parameter equal to one ensures indenting on output.
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