Read HTML From A Website Using The WebBrowser Control?
Nov 25, 2010
I have a website that divided into 4 frames. I'm trying to create an application that will constantly run on my PC as a task looking for certain text in the HTML in a frame.When it finds the text it would alert the user by presenting a pop-up message. This is basically a monitoring website that checking network nodes. Instead of staring at the screen looking for critical messages I would like to be notified when there is an alert.
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Nov 16, 2010
I did a search in google, through my webbrowser control, and wanted to search the html of the google search results..
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May 17, 2012
I'm probably missing something really simple or trying too much at once but it's 16:30 on a Friday afternoon and my head is wrecked Basically, I'm trying to build an application that takes out put from a database query as XML and uses XSL to transform it into HTML which is then displayed in a web browser controll on another form.
I thought I break it up into pieces so I decided to just create an XML file and an XSL stylesheet and read this into the web browser control but all I'm getting is <HTML></HTML>
[Code]...
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Feb 4, 2010
how to read HTML text box elements from the Web Browser control
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Jun 14, 2011
I have been trying to use the WebBrowser control to access a website, nothing fancy involved, just a Security Certificate error message I can't get around:
The site that I've been trying to access is [URL].. By clicking on the "Login" hyperlink you are taken to a https connection.Internet Explorer simply allows you to click on the "Continue to this website (not recommended)" link which displays the Logon screen.Clicking on the same link in a WebBrowser control simply reloads the page as (I assume) WebBrowser has not been told that the page is ok.
I've tried looking around for the solution with no luck, it seems like such a simple problem..
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Feb 20, 2010
I have a regular application form with a WebBrowser control.I have strung together a .htm file (from a regular text file) which I then assign to the WebBrowser control. In the html file, I have filenames mentioned.I am trying to string together the html in such a way as to give a clickable link or button that will parse into html and open the corresponding file in another WebBrowser control in VB.I have tried using VBScript and JavaScript to put a button in the html.As long as the function or sub I call is also in the same html document, it works, but I really need to transfer the control back into visual basic where I can do the heavy lifting I need to.can I just not do this as a regular VB application? Any way to do it without adding the complication of requiring ActiveX?
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Feb 13, 2011
I have made an app that will check to see if a website is on the 1st, 2nd, 3rd, 4th, and 5th page of google, the websites are in a datagridview. I am using five webbrowser controls but it begins to get slower and slower? As it searches for each website using a for statement. How to improve this code to make it run quicker, or even a better way to go about it.
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Jul 1, 2010
I'm trying to access a secured website using vb 2005 and webbrowser control. I've got the credentials, the script can pass the login page but when trying to navigate to the second page within, the page is being redirected back(to the first page after logging in). The second page I'm trying to get to retrieves the data from a database and displays some options for the user to select in order to prepare a report which can be downloaded after the fields selections. And I wanted my script to do this automatically without user interaction.
Public Class Form1
Private Sub TestButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TestButton.Click
Dim wb As WebBrowser = WebBrowser1
[code]....
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Sep 4, 2009
I am trying to automate login and navigation to a website using the WebBrowser control. I can successfully logon to the site using the wb control but after that I can't seem to get access to the newly loaded document's elements within the same routine. I check for ReadyState Complete and IsBusy but they don't seem to be working. There don't appear to be any frames being used at all so I can't figure out why this won't work. I know that the wb control is successfully logging in because I can see the page load in the wb control. However, after the page loads I try to access the HTMLDocument for the new page (after logging in) and it is either set to Nothing or it's the previous page's HTML. I've tried putting in a Sleep to wait for the page to finish before trying to access the HTMLDocument on the new page but it still doesn't work. If I create a button on my form that accesses the HTMLDocument and click it it works fine. I can't figure out how to ensure that the entire page has finished loading within my routine. I tried putting a switch into the DocumentCompleted event but that doesn't work either.
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Jun 3, 2009
I need my application to go to a website, press a button on the website to get data, and then get the data that it shows all without the user seeing the webbrowser control. I'm doing this for a little project. The user could normally just go to the site and press the button themselves, but that would take to long. So how do you programmatically do this?
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Feb 17, 2009
I am trying to figure out if the text from a website is visible when the page is rendered in a webbrowser control. The text I am looking for is error text that shows form field errors after a bad post submission. I've checked the source code of the html being returned and the actual html for the text i'm looking for is present before any errors are made, and after the errors are detected. is there any way i can do a sort of .visible check on html elements in a webbrowser object, or even check the css that is linked to a particular div/label/span for the visibility/display style tags?
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Dec 28, 2009
Getting the html source from my webbrowser control. I'm trying to get the source in the DocumentCompleted event of the webbrowser. The code i'm using is this[code]...
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Jan 26, 2011
I am currently trying to be able to set the HTML in a WebBrowser control. The bit that I am having the trouble with is that when I go to put the HTML in the WebBrowser control on Form.Load or Form.Activated the WebBrowser1.Document.Body is Nothing. This means when I try to do; WebBrowser1.Document.Body.InnerHtml = value I'm getting an exception as I am trying to use it.I have also tried setting the HTML on the DocumentCompleted event for the WebBrowser control, but that event doesn't fire when I load the form (to be honest I didn't think it would but it was suggested somewhere on the Internet).
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Jan 2, 2009
is there a way in vb.net to make it so that if the html in a web browser control contains a certain word then on startup it will show a dialog box. Basically I want to create an update system in which when the update dialog box web browser control html contains the words "update available" then on start up the dialog box will show prompting the user to update.
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Aug 31, 2009
I have tried function like htmldocment.setAttribute() and webbrowser.document.body.style="font-size:34px"
it's not always working, why?
for example
Dim a As HtmlElement
a = wb.Document.GetElementById("tableID")
a.SetAttribute("border", "3px")
[Code]....
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May 18, 2011
I want to load some HTML into a webBrowser control, then operate a particular bit of code when it has finished loading.The code operates fine as long as I pause to wait for it to finish loading. If I just run the code without pausing, it sometimes messes up the display. webBrowser.Document Completed doesn't run after Document.write.I don't want to use webBrowser.DocumentText = "..." because that makes an annoying click sound every time it refreshes. A lot of people are annoyed by this. There are countless threads asking how to turn off the click, and using .write seems to be the only solution that doesn't require hacking the registry.
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May 18, 2009
I am attempting to obtain the price from a DIV tag in this HTML:[code].......
I've tried a few different combinations to get the price. I imagine I have to use .InnerText, but I can't seem to figure out how to split up the tag in order to use .InnerText.
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Jan 14, 2009
Ok you know how our web browsers like Internet Explorer or FireFox has the option to "Save Page As". Is there a way to do this using the Web Browser Control? I wish to save the HTML + Images that are displayed in my Web Browser Within my application. Or say if I go to a website and they have a dynamic image that keeps Changing is there a way to save that image that is displayed on the Web Browser control?
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Aug 31, 2009
I have tried function like htmldocment.setAttribute() and webbrowser.document.body.style="font-size:34px"
it's not always working, why?
for example
Dim a As HtmlElement
a = wb.Document.GetElementById("tableID")
a.SetAttribute("border", "3px")
[Code]....
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Jun 11, 2009
WHen we click on site whether left click or right....Control goes to IEDoc_MouseDown event,I just want to ask is that possible to know taht which element is clicked..Suppose we right click on link,is that possible to know it that link is clicked.
Public Class Form2
Dim WithEvents IEDoc As System.Windows.Forms.HtmlDocument
Private Sub Form2_Load(ByVal sender As Object, ByVal e As System.EventArgs)
[Code].....
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Oct 4, 2005
WebBrowser Example.zip IntroductionBecause the WebBrowser control that we use in .NET is a COM control, not all of its uses are straightforward and some of them (even those which seem like they should be easy) require that we dip into our Interop toolbox in order to properly implement them.
A perfect example of this is loading HTML content into the WebBrowser from memory, rather than a file or a URL. Anyone who's ever used the WebBrowser control before is familiar with the Navigate2 method, which tells the control to load content from a URL (or path to a file). Loading HTML content from memory, however, is a rather elusive practice because of the many steps involved in making it work.
MSHTML.HTMLDocumentYou might notice that the WebBrowser control exposes a "document" property. The object returned by this property can be coerced to the type of "mshtml.HTMLDocument" (you must add a reference to MSHTML to your project in order to make this work) as follows:
Code:Dim clsDocument As mshtml.HTMLDocument = CType(WebBrowser.Document, mshtml.HTMLDocument)
(NOTE: You will have to add a reference to the COM library MSHTML to your project to make this compile)
Once we create an instance of HTMLDocument, a whole new world opens up to us, providing all sorts of DOM access to the content of any given Web page.
If we were to create our own HTMLDocument object from memory, we could use the "write" method to write HTML content to the document from a string variable, like this:
Code:'initialize the document object within the HTMLDocument class... clsDocument.close() clsDocument.open("about:blank")
'write the HTML to the document using the MSHTML "write" method... Dim clsHTML() As Object = {sHTML} m_clsDocument.write(clsHTML) clsHTML= Nothing
WebBrowser Control ImplementationUsing the HTMLDocument returned by the "document" property of the WebBrowser control, however, is not as straight-forward. Because of the way that this object is created and initialized in memory (by the COM WebBrowser control), the "write" method fails when called as above. In order to write content to the HTMLDocument exposed by the WebBrowser control, we must first marshal the string value to a memory space that is compatible with COM. Once the string is properly marshalled, the COM interface IPersistStreamInit (implemented by the HTMLDocument class) must be used to pass the value into the object.
Interop DeclarationsIn order to pull all of this off, we must declare several Interop pieces, including an enumeration, a function, and two interfaces. The declarations for these pieces are as follows:
[Code]....
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Aug 31, 2009
For example how do u delete on row in a table?how do you remove a <img /> entry?
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Aug 31, 2009
For example how do u delete on row <tr> in a table <table>?how do you remove a <img /> entry?
by remove means not just set the innerText to?
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May 23, 2009
I am using webbrowser control in my windows application(VS2003). Below is the code.
Sub LoadHtml(ByRef MyWebBrowser As AxSHDocVw.AxWebBrowser, ByVal sFileName As String) 'MyWebBrowser is webbrowser control added at design time on form and sFileName is .txt file with full path Dim sImgDir As String
[code].....
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Aug 17, 2009
Is it possible to load HTML content into the HTMLDocument object without having to use the WebBrowser control? I have an html file stored locally that I want to parse in order to find out which checkboxes are on and which are off.
All of the examples I've found use the Webrowser. It just seems convoluted to have to use the WebBrowser in order to get to a DOM object.
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May 7, 2009
WHen we click on site whether left click or right....Control goes to IEDoc_MouseDown event,I just want to ask is that possible to know taht which element is clicked..Suppose we right click on link,is that possible to know it that link is clicked.
Public Class Form2
Dim WithEvents IEDoc As System.Windows.Forms.HtmlDocument
Private Sub Form2_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
[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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Feb 19, 2009
How can I display HTML code on a form without having to add a webbrowser control?
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Mar 15, 2010
I am using a WebBrowser-Control to fill in a webform and then click at a button, this currently results in a standard Download File Dialog (you get these if you download a file using internet explorer), but instead, I have to catch this file and save it automatically with a by me defined name to a specific folder.I am trying to code a little application in vb.net which download the Export-file from my wordpress-blog, and I want to do this completely without user-interaction.Currently everything works, except the downloading of the file.I tried to catch it with the event System.Windows.Controls.WebBrowser.Navigating(ByVal Object, ByVal System.Windows.Navigation.NavigatingCancelEventArgs) but I don't see where to download the file from?
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Dec 18, 2007
How can I access the HTML source of IFrame within a page by using WebBrowser control?
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