Checking null for htmlnode collection using c#

HTMLAgilityPack XPath syntax to extract URL from HTMLNode?

What ...XPath... syntax should be used to extract 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

Using the built-in.net WebBrowser, I designed an HTMLElement picker (DOM). By clicking on an HTMLElement, the user may choose (select) it....The HTMLAgilityPack is what I desire. The HTMLElement's associated HTMLNode...Using Doc is, in my opinion, the simplest method. DocumentNode. SelectSingleNode(EXACTHTMLTEXT), however, is ineffective (because t...

NullReferenceException ERROR in foreach loop using HTMLNode

If "SelectNodes" returns ...NULL..., how do I detect the ...NullReferenceException... Error in the foreach loop below?...The null-coalescing condition (?? condition), which may be used to capture this problem, was mentioned in a search on stackoverflow, but I have no clue what the syntax for HTMLNode would be or even whether that's really feasible....

Removing a HtmlNode inside a HtmlNode with the HtmlAgilityPack

Why not just get rid of the nodes straight away?...var numbers = htmlDoc.DocumentNode.SelectNodes("//house/number"); if (numbers != null) { foreach(var node in number) node.Remove(); } ...In either case, you need to provide a route relative to the current node since your XPath is choosing all of the nodes:...house.SelectSingleNode("//n...

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

If you don't include a dot, the XPath will match from the Document's beginning rather than from within the node....Simply swap out your second string for...".//div[@class='name']/a"... and it should function

Proper way to change HtmlNode value in document using HtmlAgilityPack

This was a significant library flaw (...http://htmlagilitypack.codeplex.com/workitem/32959...). It has just recently been corrected, at least in the source code (the 1.4.6 version does not have it). You may recompile after running get latest.

C# HTML Agility Pack Single Select Node returning null

Using C#, Windows forms, and the HTML Agility Pack, I created a web scraper....Everything was running well until the website altered its code and ruined everything. Although I am aware that it often occurs with site scrapers, I am currently having problems finding out how to fix the problem....Currently, my scraper runs across many URLs, scraping d...

HtmlAgilityPack C#--- Selectnodes Always returns a Null

DOM Demands...<tbody/>... To Be Inserted Tags...The DOM is the platform used by all popular browser extensions for creating XPath expressions. Unlike the HTML specifications, the DOM specifications demand...<tr/>... components should be included...<tbody/>... browsers fill up these items if they are missing. The differences between seeing the page ...

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

To retrieve just the second row, use the XPath position filter....<td>... each kid from...<tr>... :...//table[@id='animal']//tbody//tr/td[2] ...Actually, it is equivalent to CSS....:nth-of-type()... choice and displays the same results as...:nth-child()... only if every kid belongs to the same type (which implies that every child is...<td>... in t...

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

I'm attempting to read urls and get photos from a website here. I must cease obtaining the photos from 404 error pages and omit the page if it is one. how to do that using HTMLAgilityPack? The code is below....var document = new HtmlWeb().Load(completeurl); var urls = document.DocumentNode.Descendants("img") .Select(e => e.GetAttributeVal...