htmlagilitypack select all input elemet in html

Question

4.67/5 (2 votes)

See more:

Hello,

Please help me with code using htmlagilitypack to select all input element (including select, textarea etc), on a form, extracting the input element name and type

VB

Dim htmldoc As HtmlDocument = New HtmlDocument()
        htmldoc.LoadHtml(txtHtml.Text)
        Dim root As HtmlNode = htmldoc.DocumentNode
        If root Is Nothing Then
            tsslStatus.Text = "Error parsing html"
        End If
        ' parse the page content
        For Each InputTag As HtmlNode In root.SelectNodes("//input")
            'get title
            Dim attName As String = Nothing
            Dim attType As String = Nothing
            For Each att As HtmlAttribute In InputTag.Attributes
                Select Case att.Name.ToLower
                    Case "name"
                        attName = att.Value
                        'get href or link
                    Case "type"
                        attType = att.Value
                End Select
                If attName Is Nothing OrElse attType Is Nothing Then
                    Continue For
                End If
                Dim sResult As String = String.Format("Type={0},Name={1}", attType, attName).ToLower

                If txtResult.Text.Contains(sResult) = False Then
                    'Debug.Print(sResult)
                    txtResult.Text &= sResult & vbCrLf
                End If

            Next
        Next

thanks

Posted 23-Jun-11 9:44am

Cool Smith

Updated 24-Jun-11 0:41am

v3

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)

Manfred Rudolf Bihy · Accepted Answer · 2011-06-23T22:47:00

Solution 1

C#

HtmlDocument doc = new HtmlDocument();
doc.Load("SomePathToAHTMLDocumentHere");
HtmlNode docNode = doc.DocumentNode;
HtmlNodeCollection nodes = docNode.SelectNodes("//input"); //SelectNodes takes a XPath expression
foreach(HtmlNode node in nodes)
{
    String id   = node.GetAttributeValue("id");    // Fetch id of HTML element
    String name = node.GetAttributeValue("name");  // Fetch parameter name (GET/POST)
    String type = node.GetAttributeValue("type");  // Fetch type of input element
    // Do your processing now
}

Go to the download site and fetch the CHM file. That will help you.

Cheers!

--MRB

Posted 23-Jun-11 22:47pm

Manfred Rudolf Bihy

Updated 25-Jun-11 9:21am

v2

Comments

Cool Smith 24-Jun-11 4:55am

hello, thanks, but this only get the input (text and check box) what of combo (select tag) textarea, list, checkbox etc

BobJanova 24-Jun-11 5:56am

You said you wanted 'input elements' i.e. things represented by <input>. That should include check boxes, text entry, buttons and radio buttons. To get <textarea> or, <select> you will have to call SelectNodes again with the relevant element type.

Manfred Rudolf Bihy 24-Jun-11 6:12am

Use docNode.SelectNodes("//select") or "//textarea" etc. etc.

Besides you should consider voting on my solution and accepting it as the answer.

Cool Smith 24-Jun-11 6:36am

is there anyway i can include an OR or AND in the xpath query?, somthing like

docNode.SelectNodes("//select" OR //textarea OR //input"

thanks

Manfred Rudolf Bihy 24-Jun-11 7:49am

Use the | character to seperate the expressions: "//input | //select | //textarea".