Next Loop To Scrape Through Some Html Code?
Mar 25, 2010
I am using a for next loop to scrape through some html code. I am testing elements for a certain string, and when it hits that, I need to get the string that resides 2 elements earlier.When going through a for...next loop (I know you can loop completely backwards with step -1), is there a way to 'go back' 2 loops?
Ex)for each'lets say we are 5 loops in and our if returns true'can i go back to loop 3, perform an action, then return to loop 5 and continue the real loops?
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Dec 29, 2010
I'm trying to scrape the right url from html file using webbrowser I want to scrape this Href and navigate to it. But the problem is every other comment with reply is almost the same. So if I use to scrape hrefs and check the name it will give me the reply buttons of all the comments + the new comment button. Is there a way to grab this link only this one by it's Class name or something?
<a href="forums.php?op=post&p=1409951"><img src="/images/icons/comment_add.png" class="inline_icon" align="top"> New Comment</a> The ones I don't need:
<a href="forums.php?op=post&p=1409971">Reply To This</a> I'm trying to create my own browser and this should be a button short cut If I want to comment.
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Jun 19, 2012
I have used Web Browser in VB to get the HTML source code of a web page and put it in a richtextbox. I need to take that HTML and extract the data needed from it. I have searched and cant find an example that I can understand being new to VB.Net I am trying eventually import the data into excel.
[Code]...
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Apr 4, 2012
I would like to know please how to check whether a string exists or not in a html code. I'm executing a for loop. Each time it checks a different url, so I want to be able to check each time if for example "<img" exists .
P.S: What's the difference between using
webrowser1.navigate
AND
dim request webrequest
request = WebRequest.Create
etc...
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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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Jul 28, 2010
I looked around the forum can't find something really simple.I want to scrape everything between the
<!-- google_ad_section_start -->
to
<div class="ad_editorial-sponsorship"></div>
copy it and use it right after it's website and I navigate using webbrowser1.
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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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Apr 17, 2010
I have list of urls that I use a foreach loop on. I want to visit each url with the webbrowser and collect html, but the webbrowser only collects the html of the last url. I think the loop is too fast?
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim Collecthtml As String = ""
Dim websitelist As List(Of String) = GetURLs()
[code]....
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Mar 7, 2010
I'm trying to make a small scraper can't figure out how what i want to do is scrape the <a href over the webpage I just navigated with webbrowser1.navigate now there are many <a href over the page i need to scrape all the <a href only this ones:
"<a href="/page/page/218/445/"><img src="/images/***.gif" width="44" height="16" alt="Download ***" title="Download ***" border="0"></a></td>"
i need the code between "<a href=" and "><img is there a command to find a string in html after <a href=" and before "><img ? scrape all of them there are many and save it over txt file how can i do that?
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May 24, 2011
I'm trying to make an app that will scrape numbers off of a webpage. What I want to do is have it read the Game Name and then Views (for statistics keeping). The WebPage is set up like
<tr class="odd">
here are 7 <td> tags that display different things
</tr>
[Code]....
I'd like the app to check the second TD tag to see if it's innertext says, lets say, 'GAME', and then if it does, it adds the innertext of the 7th TD tag (which is a number), to the total sum, and it scrapes all of that info off the page.
I can understand the logic of how to process the info, but I have no clue as to reading the correct tags.
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Nov 12, 2009
I'm just starting working on a program and the amount of pages I'm trying to screen scrape take over 20 minutes, so I was hoping I could run like 4 or 5 threads to cut that down??? I'm pretty much still a novice, so be easy on me. I understand good, though.
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Nov 10, 2010
I am developing a web program using asp.net(vb) that scrapes data of a certain website. I am using System.Net.HttpWebRequest and System.Net.HttpWebResponse.My problem is I can not retrieve the codes of certain frame/container where the data that I needed is located. I mean, when I view the source code of the website, I can not find the data but I can see it on the web page. When I view source it, it is under the
[Code]...
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Sep 6, 2010
Im trying to scrape some text on a webpage, I asked in the regex section and they recommended to use HtmlAgilityPack with Xpath to scrape the info I want.
[code]...
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Mar 7, 2010
I'm trying to make a small scraper can't figure out how what i want to do is scrape the <a href over the webpage I just navigated with webbrowser1.navigate now there are many <a href over the page i need to scrape all the <a href only this ones:
"<a href="/page/page/218/445/"><img src="/images/***.gif" width="44" height="16" alt="Download ***" title="Download ***" border="0"></a></td>"
i need the code between "<a href=" and "><img is there a command to find a string in html after <a href=" and before "><img ? scrape all of them there are many and save it over txt file how can i do that?
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Aug 31, 2007
I just got VB and I am having a hard time learning this stuff. but I am not giving up.I am looking to make a web text scraper, so I can scrape words off of webpages and put them into a text file.I couldnt find a whole lot of help in the search function. bare with me, I am new here and new to programing also.
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Jul 28, 2010
see this codes scrapes all href links and check if it contains "/file/" to save it but I get duplicate links saved so If i can change this code to work some how with Innertext("More") I will have no duplicatestried to configure it to work with innertext it just doesn't fit the way I think it should ;/and if anyone can add how can I remove duplicated urls on my txt file that would be really nice I might need it
Dim links As System.Windows.Forms.HtmlElementCollection
Dim b As String
links = WebBrowser1.Document.Links
[code]....
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Nov 9, 2009
What I am trying to do is load a directory of images using VB.Net code. Here is essentially what I'm trying to do.[code]...
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Dec 22, 2010
How to put my vb login code into my html code so that it works on my webpage.
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Mar 27, 2011
I am *VERY* new to web-scraping and am trying to scrape some information off of a webpage that is heavily javascript enabled. An example of the page I am trying to scrape from is: [URL] I am trying to scrape the property links such as "322 E 98th St" The text appears on the webpage and I can find the link myself, but it doesn't appear in the page source code.
I am trying to scrape it using the webbrowser control using the WebBrowser1.DocumentText property, but it doesn't even show the links simply when I view the source in ie. I am sure this has something to do with the javascript it uses to load up the page or maybe iFrames,
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Apr 22, 2011
Ok so basically heres what i need to do: Extract text from the webpage that meets a certain criteria. There will be a ton of these on 1 page and i would like to add them to a rich textbox on sperate lines.
I know that it needs to be in a loop and its needs to Parse the wepage(Dim web1 As String = Me.WebBrowser1.Document.Body.InnerText)
The criteria is: Starts with 1 to 4(random) integers, Followed by "my" then 13(random) numbers and letters. Or if it starts with "167my" + 6(random) number and letters.
Edit: Also im going to try to make it loop through a list of webpages to do this.
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Dec 22, 2010
how to put my vb login code into my html code so that the login encryption works on my webpage.
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Sep 23, 2011
I have 1 HTML page in a StringBuilder that consists of a number of tables. After each table I put a page break for printing purposes. Now I need to fax this HTML page.After each page, a break page should be faxed on another page. I need to do this in either VB.NET or C#.
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Mar 30, 2011
In PHP I can use the following to stop HTML from rendering, so it actually displays html as text on the web page:
$html = "<div>Some text</div>";
echo htmlentities($html);
How do I do the same with asp.net pages (vb.net). I am using .NET 3.5.
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Jul 16, 2010
c# - Is there #Region code for HTML
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Dec 21, 2010
I want i have multiline textbox... if i type the html code snippet in textbox then click on submit button then the html coding will run of Default .aspx with the dimension 920 * 220 pixels.How to do that using asp.net (VB)
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May 23, 2010
i want to generate something like this:
<ul>
<li><h2>CSS Drop Down Menus</h2>
<ul>
<li><a href="http://www.seoconsultants.com/tips/css/#cssmenus" title="SEO Consultants Directory">CSS Hover Navigation</a>
<ul>
[code]....
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Jan 1, 2010
I got a tips from a friend to use GetElementsByTagName(tagName) to this.
1. I don't know if it's the right for this
2. I don't know how to use it.
I need to get a name for a input in a html code, not the valuse of the input, the name!Here is the html source:
Code:
<td><input class="text" type="text" name="ebd435a" value="" maxlength="15" /> <span class="error"> </span></td>
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Jan 5, 2011
i have been trying for hours to get something to work, but sadly nothing worked, so i though of asking more expert people so im trying to get a text out of HTML code, using REGEX matching and i got it to work pretty well, but my problem is, im trying to retrieve a text in a different line..here is what i got:this is the text i want to get is: "this is what i need"
[Code]...
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Apr 23, 2012
When i run this code to get results from yahoo or google it does not work and it says that that ids not there but it always is."Object reference not set to an instance of an object."
Public Class Form2
Private Sub WebBrowser1_DocumentCompleted(ByVal sender As System.Object, ByVal e As System.Windows.Forms.WebBrowserDocumentCompletedEventArgs) Handles
[code].....
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Mar 29, 2012
How can I change the HTML code via VB .Net code?For example,
on .aspx file I have:
<div class="Menu_On"><asp:LinkButton ID="Link_Menu1" runat="server">Menu 1</asp:LinkButton></div>
[code].....
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