Clear WebBrowser Control Of Previous Page Before Loading Next
Jan 19, 2012
I am using web browser control in one of my forms for displaying html files (local files). Before I load the next file I want to clear the webbrowser control of the previous page. I am trying the following method which I found while searching the net.
private Sub ClearWebBrowser(ByVal wb As WebBrowser)
Dim tempDoc As IHTMLDocument2 = CType(wb.Document.DomDocument, IHTMLDocument2)
tempDoc.write("")
tempDoc.close()
End Sub
I have added the reference for mshtml namespace in com tab. When trying to run the program, error is thrown like "Type 'IHTMLDocument2' is not defined. (BC30002)".
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Feb 11, 2011
In my userform I have a WebBrowser control to load PDF files. I have added a FolderBrowserDialog to allow user selection of drives and or folders.
What I am trying to do now is after a file has been selected and viewed, the user may want to change drives and or folder locations. How do I remove the current contents of the WebBrowser control to be a blank screen (just like when the app starts, its blank).
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Dec 25, 2011
I have been tasked to do a project, and have been given a list of links from the client - what the Project needs to do is:1 - open google with a specific search phrase - no problem2 - look on that page for any links containing any member of the list of links, if found, invalidate the entry in the list, and auto-click the link, then go back3 - repeat for any other "finds" on that page4 - when done, auto-click on "Next" (no problem) and go back to step 2For now, I am not even attempting to auto-click the found link and go back, I am just listing all found links in a TextBox. The problem I am having is waiting for the next pages to load before looking for a match in the list of links. I tried using webBrowser.DocumentCompletedto set a Boolean - I tried testing WebBrowserReadyState in the DocumentCompleted event ar the code below gives the best results but it is inconsistent, meaning it completely misses some pages that I know have links on them that match.
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Jun 13, 2010
I'm creating a web bot to fill many forms. How can i do it faster than general form? I just wanna to load that parts of page i needed. not images and menu and ... Can I Do This?
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Jan 20, 2010
I need a progress bar to show the download progress of a file from the webbrowser control.
I want the default popout download window to not show and to show the progress bar
somewhere else, and show the time remaining. Basicaly what I want is for my info of the
window that shows download progress and info to show on the default window of my program.
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May 9, 2010
Dim Page16 As String
Page16 = Application.StartupPath & "ResourcesHTMLPage16.htm"
WebBrowser16.Navigate(Page16)
[code].....
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Sep 6, 2007
Is it possible to disable image loading on the webBrowser control? - So that pages load faster. I just want the HTML of the page to work with in my code - I don't wish for the page to be displayed. And I know that using httpwebrequest or webclient would normally be the best option for this kind of thing but I need to browse secure https pages and I don't know if that's possible with anything other than the webBrowser control.
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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 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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Jan 2, 2012
I am loading forms into a TabControl creating a new tab page each time the form is loaded. ** I would like to point out that I am using UC instead of a from**
Now, I can easily have many tabs with the same form loaded. On the form I have a 'Search Button' So my question is, after clicking the search button how can I tell which instance of the form the 'Search Button' was clicked? Hope this makes sense
[code]...
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May 28, 2012
How to save image from webbrowser loaded page to hdd (after loading save to hdd)?
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Jun 3, 2011
i want to get the html Source code of website,it something like:wb.Document...
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Nov 5, 2010
I know it is possible to save a page viaWebBrowser1.DocumentTextI want to save the current loaded page in webbrowser controlin the same way i.e. does,creating the mypage.html and the associate dir mypage_filesthis way I also save images
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May 31, 2012
I have a gridView in ConsumerList page. When Edit button is clicked (in each row), it is navigated to a EditConsumer page. In the EditConsumer page, I need to get the values of the selected row using Page.PreviousPage.[code...
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Dec 6, 2009
I have several forms that are "reused," or vistited more than once per each time in the whole program. In VB6, using Form.Show() would show the form in its original state (the state is was when created in the designer). After closing this form (Unload Me), showing it again would still show the form in its original state.
I am coding in VB.NET 2008, and noticed that when I reopen a form I had closed during a session using my program, the form is in the state it was when I closed it (labels and listboxes filled with data), and not in its original state. I currently have the Form.Closing event filled with code to clear all of the controls, but I think that there must be a better way to "clear" or "reset" the form.
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Nov 15, 2009
Have experimented, but none of them has worked.
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Jan 10, 2009
I have a web browser control, what I use is:
Ret = (MainBrowser.ReadyState <> WebBrowserReadyState.Complete Or MainBrowser.IsBusy)
If ret is true, not loaded, otherwise, loaded. It works fine on winxp, however, on vista, most times, it works, sometimes, not. Do I have to use documentcomplete for this? The page is loaded from another thread, does it matter?
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Apr 5, 2010
I'm using a webbrowser control in my program and I navigate to a page that uses sessions. I need to delete them somehow and I tried to close IE and enter it again and it worked, the sessions were deleted. But I've done it manually, and I need to do it through my program, so is there a way to imitate the closing and reopening of my webbrowser control?
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Dec 17, 2009
I am navigating to a web page with my webbrowser control
[Code]...
and this works on most pages. Now I'm going to a page that I guess there are errors in the page and I get a box asking me if I want to debut in IE's built in script debugger or something to that effect. Is there any way to have the system ignore this message and continue to load the page as normal
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Apr 5, 2010
I'm using a webbrowser control in my program and I navigate to a page that uses sessions. I need to delete them somehow and I tried to close IE and enter it again and it worked, the sessions were deleted. But I've done it manually, and I need to do it through my program, so is there a way to imitate the closing and reopening of my webbrowser control?
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Mar 20, 2012
Hi,I need to see if a webpage displayed via the web browser control contains certain words .I've tried parasing through the html but that contains too much junk html and css tags which caused problems(I've tried using regex to remove them).That was done by using property webBrowser.document.Body.InnerText.contains .
Are any way to search through the actual text on the webbrowser and not html via the program in ways similar control-f function on most webbrowser but using code to do that ?
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Jan 21, 2012
the code below is for creating controls at runtiem, but i have realised even tho i remove the controls and then add controls, they are keeping their settings and more so the Data, eg the checked list boxes are keeping their data so if i do some work with 1 of the 3 pannels then when i change the pannel im working on it still has its lists, how would i go about using a 'frest template' as in a clear all previous settings just so their isn't any possable errors.
[Code]....
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Oct 26, 2010
I'm using a WebBrowser control in my current program in a bit of a bastardized way: I don't use it visually, I just use it because I'm more familiar with its events.
So, basically, I create a WebBrowser control and navigate to a page to login. Then, when logged in, I create a new WebBrowser control and navigate to a different page.
I've used this program for four months with no difficulty. Starting today, though, the second phase of that has been going really, really slowly. What used to take 3-5 seconds is taking 25-30 seconds. It still works eventually, it just takes a while.
Usually I would assume this was a server problem. However, navigating to the exact same URL in Firefox happens extremely quickly. Weirder still, within the program there is a user WebBrowser control -- I can copy/paste the URL the previous (not visible) WebBrowser was navigating toward into this user WebBrowser, and it goes just fine.
What in the world could be holding up this other "custom" WebBrowser? I don't even know where to begin in diagnosing this.It might be important to note that the site this is working based off recently underwent some changes -- but I can't imagine why that would affect only these "custom" WebBrowsers and not the user one in the same program.
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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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Dec 25, 2011
How can I get a list of ALL links on a page after browsing to a page via the webbrowser control?
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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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Jan 15, 2012
Here is my code:
Dim TestHeader As String = "Referer: [URL]"
If chkRefferer.Checked = True Then
WebBrowser1.Navigate(cmbUrl.Text, False, Nothing, TestHeader)
Else
WebBrowser1.Navigate(cmbUrl.Text)
End If
Whenever I try and browse to a page with the 'TestHeader', IE opens up and goes to the page.... However, if I navigate to the same page without the additional header, it loads up fine in my webbrowser control.
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Jul 6, 2009
I have a webbrowser control and the following code is in a for next loop. If I use wba = New WebBrowser the code works in the background and I don't see the loaded pages in the webbrowser control. My question is how can I see the results in webbrowser component with wba=New WebBrowser ?
wba = New WebBrowser
AddHandler wba.DocumentCompleted, AddressOf wb_DocumentCompleted
TheLoginUrl = Items(2) & "/test.php"
wba.Navigate(New Uri(TheLoginUrl))
results.Text &= "Login to: " & Items(2) & vbNewLine
[Code]...
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Aug 5, 2011
I have a .net Forms Application with webbrowser control. I have a html file loaded in the control. I want to set Margins, Headers and Footers and orientation from the code itself for printing that document...
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