Solved

HTMLAgilitypack -> Check to see if htmlDoc.DocumentNode.SelectNodes is null

Posted on 2014-02-10
5
946 Views
Last Modified: 2014-02-10
Hi,

I am using the following line to loop through some html

For Each div As Object In htmlDoc.DocumentNode.SelectNodes(".//li[@class='avb-row IN_PLAY']")

Open in new window


The problem is at the moment there are no values with li[@class='avb-row IN_PLAY']")

how can i check that if li[@class='avb-row IN_PLAY']") <> Null before I do the
0
Comment
Question by:runnerjp2005
  • 3
  • 2
5 Comments
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 39846747
something like:
if not isnull(htmlDoc.DocumentNode.SelectNodes(".//li[@class='avb-row IN_PLAY']")) then
  your for loop goes here
end if
0
 

Author Comment

by:runnerjp2005
ID: 39846757
BC30451: 'isnull' is not declared. It may be inaccessible due to its protection level.

^ thats the error i get wiht the above
0
 
LVL 44

Expert Comment

by:AndyAinscow
ID: 39846764
Howabout IsNull (note I did say something like).
0
 

Author Comment

by:runnerjp2005
ID: 39846777
I get the same :S although isnull is something you can use surly lol
0
 
LVL 44

Accepted Solution

by:
AndyAinscow earned 500 total points
ID: 39846787
I've found this with a quick search, you could try the VB equivalent:
HtmlNodeCollection coll = htmlDoc.DocumentNode.SelectNodes(your path goes here);
if (coll != null)
{
    // do stuff
}
0

Featured Post

Webinar: Aligning, Automating, Winning

Join Dan Russo, Senior Manager of Operations Intelligence, for an in-depth discussion on how Dealertrack, leading provider of integrated digital solutions for the automotive industry, transformed their DevOps processes to increase collaboration and move with greater velocity.

Question has a verified solution.

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

For those of you who don't follow the news, or just happen to live under rocks, Microsoft Research released a beta SDK (http://www.microsoft.com/en-us/download/details.aspx?id=27876) for the Xbox 360 Kinect. If you don't know what a Kinect is (http:…
More often than not, we developers are confronted with a need: a need to make some kind of magic happen via code. Whether it is for a client, for the boss, or for our own personal projects, the need must be satisfied. Most of the time, the Framework…
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…

789 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