How to save a XML File using XPath

antovinraj has asked for the wisdom of the Perl Monks concerning the following question:

Hi,
Good Evening. I am using the xpath in my program and i an retrive and update the values. But I am unable to save the file. I have attached the code bellow.

use XML::XPath;
  
$name = "Vinodh";
my $file = '../main/memlist.xml';
my $xp = XML::XPath->new(filename=>$file);
my $nodeset = $xp->find("/MEMBERLIST/LIST[NICK='$name']/ROWID");
$data = $xp->getNodeText("/MEMBERLIST/LIST[NICK='$name']/NICKID");
print $data;
$val = "9999";
$xp->setNodeText("/MEMBERLIST/LIST[NICK='$name']/NICKID",$val);
[download]

My Xml file is

<?xml version="1.0" encoding="Windows-1252"?>
<MEMBERLIST>
<LIST><NICK>0</NICK><ROWID>100</ROWID><NICKID>12545</NICKID><RANK>9</R
+ANK></LIST>
<LIST><NICK>007</NICK><ROWID>101</ROWID><NICKID>10125</NICKID><RANK>5<
+/RANK></LIST>
<LIST><NICK>Vinodh</NICK><ROWID>102</ROWID><NICKID>12498</NICKID><RANK
+>18</RANK></LIST>
<LIST><NICK>0P</NICK><ROWID>103</ROWID><NICKID>5472</NICKID><RANK>4</R
+ANK></LIST>
</MEMBERLIST>
[download]

U tell how to save the document in the file
Thanks & Advance Wishes

20060814 Janitored by Corion: Added formatting, code tags, as per Writeup Formatting Tips

Comment on How to save a XML File using XPath Select or Download Code

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Re: How to save a XML File using XPath by derby (Abbot) on Aug 14, 2006 at 13:18 UTC
`my $str = $xp->getNodeAsXML(); print $str;` [download] -derby	[reply] [d/l]
Re: How to save a XML File using XPath by gellyfish (Monsignor) on Aug 14, 2006 at 13:13 UTC
XML::XPath doesn't really have have a mechanism for getting the whole document as a string so you have to do something like: `my $document = ($foo->findnodes('/'))[0]->toString();` [download] and then you can print that to a file in the usual way. Update: derby, is of course correct. The (unfortunately undocumented) `getNodesAsXML()` does `return $self->findnodes_as_string('/');` if no path is provided, however `findnodes_as_string()` comes with the caveat: "The result is not guaranteed to be valid XML though.", which may or may not also be true of my version. /J\	[reply] [d/l] [select]
Re: How to save a XML File using XPath by Tanktalus (Canon) on Aug 14, 2006 at 15:23 UTC
To be honest, this looks like pretty much exactly what XML::Twig is written for. And, unlike findnodes_as_string, I'm pretty sure that mirod guarantees valid XML output ;-) I may be biased, though, as my decision tree on XML is a bit sparse.	[reply]