Extracting Javascript From Html Using .net?
Dec 24, 2009
I am having trouble extracting links from a web page and it involves javascript running on a website that contains the url links i need. I have encountered this issue before and was able to resolve it by getting the javascript file and then parsing it for the links. However this time I am unable to find the javascript that contains the links.To better clarify here is the source code segment from the web page:
<li><a href="javascript:void(0);" onclick="javascript:changeViewMode('Detailed', false); javascript:getTopTenStatsData(this, 'PlayerStats','HR'); javascript:changeMainCategoryLinkClass('liPlayersLink'); ">Highest-Rated Members</a></li>
<li><a href="javascript:void(0);" onclick="javascript:changeViewMode('Detailed', false); javascript:getTopTenStatsData(this,
[code]....
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Jul 27, 2011
Need a bit of help with HTML Agility Pack!Basically I want to grab plain-text withing the body node of the HTML. So far I have tried this in vb.net and it fails to return the innertext meaning no change is seen, well atleast from what I can see.
Dim htmldoc As HtmlDocument = New HtmlDocument
htmldoc.LoadHtml(html)
Dim paragraph As HtmlNodeCollection = htmldoc.DocumentNode.SelectNodes("//body")
[code]....
I have tried this:
Return htmldoc.DocumentNode.InnerText
But still no luck!
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Oct 2, 2009
The method I'm currently using to extract html and the parse is via a WebBrowser control.I'm grabbing a collection of tags, sorting through the ones I want, and then pulling the innertext.Doing this on my development machine is kind of slow, but manageable. At max, I can go through 60 different web pages across 3 different sites. It takes about 5 mins on my machine.
However, this app is targeted towards machine that have a quarter of the technology that my computer has. So, it takes anywhere from 10-15 minutes. This is less than ideal.I've bee reading up on the documentation on HTTPWebRequest. However, form what I've seen I can't seem to find a way to grab the HTML and then parse it with a method from HTTPWebRequest.
Due to the way I'll be using it, I won't be able to use RegEx to parse the data and was hoping there was a method within the HTTPWebRequest property to do it.
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Jul 26, 2011
I have found a good amount of threads, but I don't know what my problem is. I cannot seem to get it. It should be simple but I cannot figure it out. Here is the HTML
[Code]....
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Oct 2, 2009
The method I'm currently using to extract html and the parse is via a WebBrowser control. I'm grabbing a collection of tags, sorting through the ones I want, and then pulling the innertext.
Doing this on my development machine is kind of slow, but manageable. At max, I can go through 60 different web pages across 3 different sites. It takes about 5 mins on my machine.
However, this app is targeted towards machine that have a quarter of the technology that my computer has. So, it takes anywhere from 10-15 minutes. This is less than ideal.
Does anyone know of any other method that I could do that would take less resources and perform a lot quicker?
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Sep 22, 2011
I am trying to grab a html table from a remote page and display the contents of this table in a htmltable on my site. I am using htmlagility pack. So far here is my code:
Imports HtmlAgilityPack
Partial Class ContentGrabExperiment
Inherits System.Web.UI.Page
[code].....
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Oct 19, 2009
I'm trying to extract the text fields inbetween the code but the text is always changing so I'm not sure how to keep this dynamic. In put them in to the proper text boxes.
So text box 1 might be Date: then it pulls the date.
and there are multiple listings. so I need it to loop until the end of </table>
[Code].....
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Jun 1, 2011
[code]The two parts I've coloured red change, I need to grab the first part which is the link but I'm not sure how to do this. I've used regex before and it doesn't look possible to use it on this on this, there's about 25 of these in the source.
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Feb 15, 2012
I have this code to show confirm message using vb.net, but I want to get the return result and use it in vb.net code.
Dim str As String = "<script>" &
"$('.test').live('click',function(){" &
"confirm('test');" &
"})</script>"
ScriptManager.RegisterClientScriptBlock(control, GetType(Button), "sas", str, False)
I am thinking in storing the result data in html compnent and use it in vb.net code, is there another solution ?
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Jan 25, 2010
How do i get the full! HTML source of a web page, after it has run some JavaScript code which has made manipulations to the HTML source.
I'm using the WebbrowserControl of VB.Net, i'd like to create an extra function of my custom webbrowsercontrol which receives the full HTML source.
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Nov 6, 2011
I have a HTML checkbox which will perform a simple validation on another textbox, so the textbox will only be enabled if the checkbox is checked, but I also want to access this checkbox control in code behind to check and uncheck it. I don't think I can use the runat="server" because on the onClick event which will cause ('<%=uitxtVouTypeRedeemValue.ClientID%>') to be output as plain text.
<input type="checkbox"
onclick="document.getElementById('<%=uitxtVouTypeRedeemValue.ClientID%>').disabled =(this.checked)?0:1" id="uichkVouTypeRedeemable" />
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Jun 21, 2009
i have a script that reads an xml file then produces some document.write javascript lines and sends them to request . I'm getting a weird character (only shows in internet explorer, not firefox). I can't seem to track it down. Here's a URL of the script being used (has weird chars in IE)The source of the javascript tag is where the .net script is
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Jan 15, 2011
I'm loading HTML into the web browser control, and adding a bit of javascript that hightlights a section of html when the user clicks on the area, by changing the classname. If you know the FireBug addin for Firefox, it's very similar to that. But what I need to do after this, is take the HTML source, and find where they clicked. But when I get the DocumentText of the webbrowser control, it's the original source. Not the source with the added class name.Is there a way to get the source code with the javascript generated html?
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Feb 23, 2010
I have a webpage I would like to parse but not too sure how to capture the links activated by clicking on links. I have take suggestions about using regex to capture the onclick statements but that does not seem to help since it does not capture anything. Here is an example of what the html contains:
<li><a href="#" onClick="SelGenre('001'); return false;">プライベート</a> (4235)</li>
<li><a href="#" onClick="SelGenre('002'); return false;">なかま</a> (1121)</li>
<li><a href="#" onClick="SelGenre('003'); return false;">ペット</a> (398)</li>
<li><a href="#" onClick="SelGenre('004'); return false;">美容と健康</a> (956)</li>
Now if I capture 'SelGenre' and try and normalize that with the webpages root etc it does not work. Clicking on the link will display other links that I need to capture.I thought it may contain some javascript file but it did not even after trying to use firebug.
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Jun 17, 2009
What I would like to do is to find a way to get the results from a HTML/Javascript script in a string, using VB 2010.To make it clean on a practical case, I would like to get, in my VB application, the results provided by the run of the following external script:The resulting string should be something like this :
"document.write('<'+'style type='text/css'>#TCGPHiLoContainer {width: 300px;font-family: Arial;}#TCGPHiLoTable {width: 300px;margin-bottom: 3px;}.TCGPHiLoHeader {font-size: 8pt;text-align: center;}.TCGPHiLoHigh {background-color: #D9FCD1;color: Black;font-weight:
[code].....
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May 24, 2012
I have dynamic html table and every cell have one checkbox. I want to get the selected checkbox if the user select from multiple checkbox from different row.
function GetAllChecked() {
var chkedshid = new Array();
var rows = new Array();
[Code]....
why why this function return just last selected checkbox for last row in loop? i need the all selected checkbox for all rows!
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Apr 21, 2010
how do I disable browsing to a http link from a Html editor. I have a vb.net web form with a html editor, when I add a hyperlink to the html editor, for example my application website for instance[URL]...When I run and click the link I can browse my application from inside the Html Editor which is so weird.It should open the link in a new window. How do I stop this from happening.This is an Intranet application. And the component for Html Editor is of TMS.
Or is there any Javascript code available where I can deactivate the link from an HtmlEditor, i mean when i add any hyperlink it should be not be activated , or no should be able to browse it from inside the HtmlEditor ?
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Aug 13, 2011
I was offered this interesting scenario by a visitor of my site and have been trying a few approaches, but not seeming to get it quite right. I have a Form with a WebBrowser control (or an AxWebBrowser if that works too) and on the page loaded in the browser, is a link that uses javascript to open a new popup window.This popup window I am unable to take "ownership" of and it launches in a new instance of the user's default browser (IE for this scenario). I need to then interact with that javascript popup window which now is not part of my application. If I needed to set a value of an input box on that form, how would I accomplish that if I can't "interact" with the form?
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Apr 17, 2011
What I would like to do is to find a way to get the results from a HTML/Javascript script in a string, using VB 2010.To make it clean on a practical case, I would like to get, in my VB application, the results provided by the run of the following external script:
<script src="http://partner.tcgplayer.com/syn/synhighlow.ashx?pk=MAGCINFO&pi=fnmp-124"></script>
The resulting string should be something like this :
[code].....
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Jun 5, 2009
I am using a Webbrowser control to access the elements in an HTML page which contains a JavaScript link which when clicked, adds extra content to the page. This works fine in IE 7 and Firefox.I then want to access this extra content in my program. Having found the HTML element containing the link, I tried element.InvokeMember("click"). I have used this successfully with a submit-type link to login to the web site, but cannot get it to work with the JavaScript link. I also tried setting the focus to the link element and using SendKeys to send the ENTER key, but all to no avail. Nothing seems to happen. I don't see the extra content produced by the JavaScript, nor do I get an error.Here is an extract from the HTML, showing the relevant (I hope) code:
[Code]...
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Nov 7, 2009
I was just wondering how to extract or parse any particual tags (whichever I specify) from webpages. I know how to extract text and links from webpages, but I tried to use the same method from the following code for div tags, title tags etcetera and it doesn't seem to work:
[Code]...
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Apr 26, 2012
I have to insert text box at button.click event. for this I've been using this code implement it, in ASPX.VB file. below code refecting attached screen shot, which displaying the textbox beside to the delete button. Issue: Example: If we insert any simple text box in ASPX page, then we can take that textbox id and we can play with that in aspx.vb file . in the same way I would like to play with the below code by having the textbox Id. How? How I need to take this text boxId(id = ""txtExperimentalStressdays"") and save the user entered data into database.
[Code]...
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Jul 23, 2010
My VB.NET code is supposed to execute third party Javascript code in an attempt to fill in and submit a form. This process consists of five steps, and I have been able to submit the form when all the steps are kept separate (i.e. behind 5 separate consecutive button clicks). Now, what I'd like to have is one button to handle all the five steps.
The problem is that the form originally only appears after calling "webbrowser.Navigate" command, which apparently modifies the page's HTML code. I seem to be unable to detect when Javascript has finished loading the new HTML in order to fill and submit the form. I have tried a timer control to wait for a certain HTML element ID to appear, but in vain. [URL]
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Oct 19, 2010
So right now it all looks pretty with ... <button type="submit" runat="server" name="subscribe" id="Button1" class="link-button" onserverclick="saveListing"> Until it is time to validate the data before calling saveListing function codebehind (in VB .Net). How can true/false be return so that when true saveListing will be called, otherwise not?
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Apr 25, 2012
I have been working lately on a program who extracts URl Source codes!The program does work with most of URL but not for MEdiafire URL!When i check the source code from the web browser i can see there is some code missing;y tried diferrent types of Encoding.
Example:This is the final source code extracted from WEBBROWSER(Firefox,InternetExplorer,GoogleCrome)
--------------------------------------------------------------------------------------------
<div class="mf_lightbox_btns lb-footer" style="text-align: right;">
<a href="javascript:void(0);" class="secondary btn" onclick="$('body').removeClass('has-virus'); return false;">Dismiss Message</a>
<a href="http:www.bitdefender.com/mediafire/fix-it.html" target="_blank" class="alt btn">Get BitDefender</a>
[code]....
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Dec 8, 2009
I was wondering, is there a way to inject certain JavaScript code into HTML page loaded in webbrowser
example:
(function () {
var css = "#fctr,#ghead,#pmocntr,#sbl,#tba,#tbe,.fade,.gbh { opacity: 1 !important; filter:alpha(opacity=100) !important; }";
if (typeof GM_addStyle != "undefined") {
[Code]...
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Jan 10, 2012
This may sound really stupid but I have to ask cause I'm not finding this answer anywhere.I have an application where the user will need to sign up for a new user account on the website [URL]..However when I am using Firefox's plug-in Firebug to view html I am getting something totally different than when I just right click on the site and view the page source.
What I am trying to do is to get the captcha from the website and display it in a picturebox on the application so the user can view the captcha, solve the captcha and then the app post is back to the service for a response.
Here is the source that I am getting using Firefox's Firebug to inspect the element:
<td>
<input type="hidden" value="Oo3Jo1I8bgzK68agMqo3s79ZZib2OkbK" name="iden">
<img class="capimage" src="/captcha/Oo3Jo1I8bgzK68agMqo3s79ZZib2OkbK.png" alt="i wonder if these things even work">
</td>
[Code]...
Why would the two be showing me two different versions of the HTML?
And how would you be able to grab that source to view in a picturebox using webclient?
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Jun 20, 2009
Usage: Users create pretty HTML news letters in another app. They post the newsletter to the web, but they also want to set the contents of the HTML news letter file as the body of an email and send it using Application In Question. The users understand to use absolute link and image references when sending an E Newsletter. Environment:
AIQ is a VB.Net app deployed via ClickOnce. It is an intranet app; one can be sure MS Office 2003 and the interop 11 dlls are on the target machines.
Restrictions: MAPI is out. It mangles the HTML. Since it is a ClickOnce deployment, we can't register dlls (I think, correct me if I am wrong). Therefore CDO and COM is out (again, I may be wrong.... I would be happy to be proven so).
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Oct 8, 2010
I have written a web usercontrol (ascx). Inside, there is a Panel that I want to show/hide on click of a hyperlink inside the usercontrol. Normally, this is easy just by doing something like this (the onclick attribute is added to the hyperlink on prerender):
[Code]...
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Feb 16, 2011
I am trying save a value from an input tag in some HTML source code. The tag looks like so:
<input name="user_status" value="3" />
I have the page source in a variable (pageSourceCode), and need to work out some regex to get the value (3 in this example). I have this so far: [Code] Which works fine most of the time, however this code is used to process source code from multiple sites (that use the same platform), and sometimes there are other attributes included in the input tag, or they are in a different order, eg:
<input class="someclass" type="hidden" value="3" name="user_status" />
I just dont understand regex enough to cope with these situations.
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