xml file reading and modifying

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xml file reading and modifying

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egon
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Posted: Fri Nov 06, 2009 12:46 pm Post subject: xml file reading and modifying

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I want to modify an xml files, but I cant even get the reading of the xml file to work. I am using xpath.
The xml file looks like this:

Code:

<?xml version="1.0" encoding="ISO-8859-1"?>
<message xmlns:ep="http://EP" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="./x_aruanne247.xsd">
<message_header>
   <from>700</from>
   <date>2009-10-07T17:38:23</date>
   <sender>John Doe</sender>
   <send_mail>John@mail.com</send_mail>
   <send_phone>123456</send_phone>
   <comment></comment>
   <require_receipt>yes</require_receipt>
</message_header>
<report>
   <report_header>
      <typeid>247</typeid>
      <timeid>2009-09-30</timeid>
      <compiler>John Doe</compiler>
      <comp_mail>John@mail.com</comp_mail>
      <comp_phone>123456</comp_phone>
   </report_header>
</report>
</message>

If I want to read the senders name the code looks like this:

Code:

#Include xpath.ahk

xmlfile = 247_30092009.xml
xml := xpath_load(xmlfile)
sender := xpath(xml, "/message/message_header/sender/text()")
MsgBox, %sender%

but all I get is an empty message box.
What I am doing wrong?

OceanMachine

Joined: 15 Oct 2007
Posts: 139

Posted: Fri Nov 06, 2009 2:29 pm Post subject:

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I don't think you are doing anything wrong, you seem to be doing what is required in the documentation:

XPath Reference wrote:

#Include xpath.ahk ; include functions (only required if it is not in your standard library)

; parsing documents:
xml := xpath_load("books.xml") ; load an XML document
titles := xpath(xml, "/bookstore/books[price>35]/title/text()") ; get book titles with a cost greater than 35

However, when I try xpath_load with a string directly (as per the above) I get an error that a variable must be passed to this ByRef parameter.

Trying it as per your code, the variable "xml" returns false, indicating that there was perhaps a problem loading the source XML.

However, I just tried this:

Code:

#Include xpath.ahk

xmlfile = 247_30092009.xml
xpath_load(xml, xmlfile)
sender := xpath(xml, "/message/message_header/sender/text()")
MsgBox, %sender%

This seems to work, not sure why your code didn't work, as it seems to be the same as the documentation?

Maybe Titan can tell us where the problem is (although I don't know if he still supports XPath any more)

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