htmlagilitypack selecting all node

Question

3.50/5 (2 votes)

See more:

i have this code

Dim htmldoc As HtmlDocument = New HtmlDocument()
htmldoc.LoadHtml(strPageContent)
Dim root As HtmlNode = htmldoc.DocumentNode

For Each link As HtmlNode In root.SelectNodes("//a")
    If link.HasAttributes("href") Then doSomething() 'this doesn't work because hasAttributes only checks whether an element has attributes or not
Next

but am getting an error Object reference not set to an instance of an object.

the document contains at least one anchor-tag? how do i check if an attribute exits?

i tried this link.HasAttributes("title") and get another error

Public ReadOnly Property HasAttributes() As Boolean' has no parameters and its return type cannot be indexed.

thanks

Posted 6-Jun-11 3:01am

Cool Smith

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Dave Kreskowiak · Accepted Answer · 2011-06-06T06:18:00

Your code is making a huge assumption. The error occurs because you're assuming that root.SelectNodes("//a") is actually returning a collection of Nodes. You might want to check this return for null before you try and use it.

The HasAttributes property doesn't take any parameters, so I have no idea what you're trying to do by passing in one. You might want to read up on the documentation for HtmlNode.HasAttibutes and understand what it does before you try and use it for something.