Parsing Form action and input name and values using html agility pack

Question

I'm trying to parse the form action value and input name with value from the following HTML code:

            <form method="post" action="actionURL" autocomplete="" name="login_form" id="login_form" onsubmit="return hash2(this)">

            <input type="hidden" name=".tries" value="1">
            <input type="hidden" name=".src" value="ym">
            <input type="hidden" name=".md5" value="">
            <input type="hidden" name=".hash" value="">
            <input type="hidden" name=".js" value="">
            <input type="hidden" name=".last" value="">
            <input type="hidden" name="promo" value="">
            <input type="hidden" name=".intl" value="us">
            <input type="hidden" name=".lang" value="en">
            <input type="hidden" name=".bypass" value="">
            <input type="hidden" name=".partner" value="">
            <input type="hidden" name=".u" value="8013sg1858dp9">
            <input type="hidden" name=".v" value="0">
            <input type="hidden" name=".challenge" value="fUhehaaMq9c2lQjndCps_rNu1eSB">
            <input type="hidden" name=".yplus" value="">
            <input type="hidden" name=".emailCode" value="">
            <input type="hidden" name="pkg" value="">
            <input type="hidden" name="stepid" value="">
            <input type="hidden" name=".ev" value="">
            <input type="hidden" name="hasMsgr" value="0">
            <input type="hidden" name=".chkP" value="Y">
            <input type="hidden" name=".done" value="somevalue">
            <input type="hidden" name=".pd" value="ym_ver=0&c=&ivt=&sg=">
            <input type="hidden" name=".ws" id=".ws" value="0">
            <input type="hidden" name=".cp" id=".cp" value="0">     
            <input type="hidden" name="nr" value="0">

            <input type="hidden" name="pad" id="pad" value="5">
            <input type="hidden" name="aad" id="aad" value="5">

                            <div id='inputs'>

                <label for='username'>Yahoo! ID</label>
                                    <input name='login' id='username' maxlength='96' tabindex='1' value=''>

                    <p id='ex'>(e.g. test)</p>

                <label for='passwd'>Password</label>
                <input name='passwd' id='passwd' type='password' maxlength='64' tabindex='2'>


    <div id="captchaDiv"></div>
            </div>
<div id='fun'></div>

        <div id='persistency'>
            <input type='checkbox' name='.persistent' id='persistent' tabindex='4' value='y' >
            <p>
              <label for='persistent'>Keep me signed in</label>
              <br>
              <span id='uncheck'>(Uncheck if on a shared computer)</span>
            </p>
        </div>


    <div id='submit'>
        <button type='submit' id='.save' name='.save' class='secondaryCta' tabindex='5'>
          Sign In
        </button>           </div>
</form>

The above form contains, input type in direct children and beside children of children. While using sample here: https://stackoverflow.com/a/9890022/1007447 code trace on c# finds no elements or Descendants for name "form".

How to get the form action and all input types with value? (sometimes, I need to skip the username password part too)

score 1 · Answer 1 · edited May 23 '17 at 12:15

1

This has been discussed a few times here on Stack Overflow.

The answer is in the same question you are referring to. You have to do:

HtmlNode.ElementsFlags.Remove("form");

var doc = ... //Load the document here

var nodes = doc.DocumentNode.SelectNodes("//form//input");

The key is on the line

HtmlNode.ElementsFlags.Remove("form")

and the explanation of why you need to add it can be found at the following pages:

edited May 23 '17 at 12:15

Community

1
1

answered Sep 18 '12 at 18:18

Oscar Mederos

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Since took some time to answer, I went with Regex solutions. I'll try this again. – Jones Sep 21 '12 at 07:03
@William.Ebe It is good to hear that you found a good alternative, but I suggest you using an library instead of regular expressions when parsing HTML :) – Oscar Mederos Sep 21 '12 at 07:26

Parsing Form action and input name and values using html agility pack

1 Answers1