Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

MSXML RSS parsing problem

Posted on 2009-05-08
2
220 Views
Last Modified: 2013-11-11
I'm using this code to parse an RSS feed: {Delphi code}

    sCat2 := 'News & Events';
    oChannelNode               := RSSXML.selectsinglenode('rss').firstchild;
    oItemNodes := oChannelNode.selectNodes('//item[category = "'+sCat2+'"]');

    if oItemNodes.length > 0 then // oItemNodes.length is never > 3


It will only return THREE items even though I KNOW there are 4 in the XML.
Any ideas why?
The channel Node XML is posted below.

<channel>
  <SNIP>
  <item>
    <SNIP>
    <category><![CDATA[News & Events]]></category>
    <category><![CDATA[accounts payable]]></category>
    <category><![CDATA[California]]></category>
    <category><![CDATA[new update 8404]]></category>
    <category><![CDATA[New York]]></category>
    <category><![CDATA[Project Management software]]></category>
    <category><![CDATA[tax tables Arizona]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[Company News]]></category>
    <category><![CDATA[News & Events]]></category>
    <category><![CDATA[certified payroll]]></category>
    <category><![CDATA[direct deposit]]></category>
    <category><![CDATA[excel time card import]]></category>
    <category><![CDATA[import job estimates]]></category>
    <category><![CDATA[magnetic media]]></category>
    <category><![CDATA[multi-state payroll]]></category>
    <category><![CDATA[subcontractor payment sheets]]></category>
    <category><![CDATA[Tra-Ser integration]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[Construction Software]]></category>
    <category><![CDATA[complexities in construction]]></category>
    <category><![CDATA[construction accounting software]]></category>
    <category><![CDATA[entry level software]]></category>
    <category><![CDATA[QuickBooks]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[Company News]]></category>
    <category><![CDATA[headquarters]]></category>
    <category><![CDATA[larger offices]]></category>
    <category><![CDATA[PR Newswire]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[Construction Software]]></category>
    <category><![CDATA[AccuBuild]]></category>
    <category><![CDATA[commercial industrial construction company]]></category>
    <category><![CDATA[SQL database]]></category>
    <category><![CDATA[tips choosing software]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[Stimulus Package & Construction]]></category>
    <category><![CDATA[AGC]]></category>
    <category><![CDATA[Arizona chapter]]></category>
    <category><![CDATA[Obama]]></category>
    <category><![CDATA[press conference]]></category>
    <category><![CDATA[Transportation Department]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[News & Events]]></category>
    <category><![CDATA[AccuBuild construction software]]></category>
    <category><![CDATA[construction software modules features]]></category>
    <category><![CDATA[existing new customer]]></category>
    <category><![CDATA[free users license]]></category>
    <category><![CDATA[special discounts promotion]]></category>
    <category><![CDATA[Spring Into Summer Sale]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[News & Events]]></category>
    <category><![CDATA[attendees]]></category>
    <category><![CDATA[construction industry news]]></category>
    <category><![CDATA[Construction Software]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[Stimulus Package & Construction]]></category>
    <category><![CDATA[3.4 billion]]></category>
    <category><![CDATA[construction on sale]]></category>
    <category><![CDATA[economic stimulus package construction companies]]></category>
    <SNIP>
  </item>
  <item>
    <SNIP>
    <category><![CDATA[Construction Software]]></category>
    <category><![CDATA[construction companies profitable]]></category>
    <category><![CDATA[construction specific software]]></category>
    <category><![CDATA[Equipment Module]]></category>
    <category><![CDATA[generating income]]></category>
    <SNIP>
  </item>
</channel>

Open in new window

0
Comment
Question by:EddieShipman
2 Comments
 
LVL 11

Accepted Solution

by:
CraigYellick earned 500 total points
ID: 24339910
I tested your XML (after deleting all the SNIP) using MS .NET and the expression:

   //item[category='News & Events']

returns 4 item elements, not three. Reasons the expression might yield only 3 hits:

* oChannelNode does not point to the entire XML document you've indicated
* one of the item elements is not lower-case or otherwise exactly "item"
* same as the above for one of the category elements
* the category element content might not be exactly "News & Events"

Try using the following expression (which ignores the item and category element names) and see if it finds 4 items:

  //*[text()='News & Events']

You could also try the above against the RSSXML object and not oChannelNode.

0
 
LVL 26

Author Comment

by:EddieShipman
ID: 24359478
I reworked how I'm doing everything and thus am now satisfied with the results.
I get each category's feed using the ?cat=XXX&feed=rss2 url and then append the items from each into one XML document and then I am able to check for the //item[category = xxx] correctly.
Thanks for the heads up, though.
0

Featured Post

Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Have you ever had your Delphi form/application just hanging while waiting for data to load? This is the article to read if you want to learn some things about adding threads for data loading in the background. First, I'll setup a general applica…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question