Checking null for htmlnode collection using c#

HTMLAgilityPack XPath syntax to extract URL from HTMLNode?

What is the proper ...XPath... syntax to grab the value of the ...href... attribute from the following ...HTMLNode...:...<a target="_blank" class="monkeys" href="http://someurl.com" id="123"> <span class="title">Monkeys are flying all over!</span> </a>

Get HtmlAgilityPack Node using exact HTML search or Converting HTMLElement to HTMLNode

I have created a HTMLElement picker (DOM) by using the default .net WebBrowser. The user can pick (select) a HTMLElement by clicking on it....I want to get the HtmlAgilityPack.HTMLNode corresponding to the HTMLElement....The easiest way (in my mind) is to use doc.DocumentNode.SelectSingleNode(EXACTHTMLTEXT) but it does not really work (because the...

NullReferenceException ERROR in foreach loop using HTMLNode

How do I catch the ...NullReferenceException... Error in the foreach loop below if 'SelectNodes' returns ...NULL...?...I searched on stackoverflow and found mention of the null-coalescing condition (?? condition) that can be used to catch this error, however, I have no idea on what the syntax would be for HTMLNode, or if that's even possible....for...

Removing a HtmlNode inside a HtmlNode with the HtmlAgilityPack

Why don't you remove the nodes directly?...var numbers = htmlDoc.DocumentNode.SelectNodes("//house/number"); if (numbers != null) { foreach(var node in number) node.Remove(); } ...Anyways, the reason your XPath is selecting all the nodes is because you need to give a path relative to the current node:...house.SelectSingleNode("//number...

C# HTML Agility Pack (not/wrong) iterating over node collection

You have to add a dot "." to the XPath, otherwise it wil match from the beginning of the Document and not inside the node....Just change your second string to ...".//div[@class='name']/a"... and it should work

Proper way to change HtmlNode value in document using HtmlAgilityPack

This was a notable bug in the library (...http://htmlagilitypack.codeplex.com/workitem/32959...). It has been fixed very recently, at least in the source (it's not in the 1.4.6 release). You can do a get latest and recompile.

C# HTML Agility Pack Single Select Node returning null

I have a web scraper developed using C#, windows forms and the HTML Agility Pack....I had it all working great when the site changed it's code and broke it. I know it happens often with web scrapers but now I am having trouble figuring out how to correct the issue....At this time my scraper loops thru multiple URL's and scrapes data from each page...

HtmlAgilityPack C#--- Selectnodes Always returns a Null

DOM Requires ...<tbody/>... Tags to be Inserted...All common browser extensions for building XPath expressions work on the DOM. Opposite to the HTML specs, the DOM specs require ...<tr/>... elements to be inside ...<tbody/>... elements, so browsers add such elements if missing. You can easily see the difference if looking at the HTML source using F...

C# - HTML Agility Pack - Node Collection - Loop table rows, selecting nth-child(2)

You can use XPath position filter to get only 2nd ...<td>... child from each ...<tr>... :...//table[@id='animal']//tbody//tr/td[2] ...It is actually equals to CSS ...:nth-of-type()... selector, and shows the same output as ...:nth-child()... only if all children are of the same type (means all children are ...<td>... in this case).

How to check if it is 404 error page(page does not exist) using HtmlAgilityPack

Here i am trying to read urls and getting the images in a page. I need to exclude the page if it is 404 and stop getting the images from a 404 error page. How to do it using HtmlAgilityPack? Here is my code...var document = new HtmlWeb().Load(completeurl); var urls = document.DocumentNode.Descendants("img") .Select(e => e.GetAttributeValu...