My C# application includes an embedded web browser, which is made possible by the System.Windows.Forms.WebBrowser class. Users are able to navigate to websites using the app, however, when they encounter a page that includes a pop-up window, the pop-up window is opened by Internet Explorer.
Does anyone know how to suppress that behavior?
NOTE: I'm new to C#, so please take that into consideration when responding.
Are you looking to actively block popups or handle them in your application? If you're wanting to customize the blocking, then you'll have to implement the DWebBrowserEvents2 interface, specifically the NewWindow3 method. NewWindow3 method has specific functionality for blocking window popups (i.e. setting the Cancel parameter to true). These methods will also let you show your own window if you wish, though you'll have to provide your own Form to host yet another WebBrowser.
If you'd like to see some real C# source code providing advanced functionality with the WebBrowser control, I'd have to say that this article on CodeProject provided almost everything I know about the WebBrowser control. Be sure to download the source!
#Kramii is correct that you can also use the NewWindow2 event to prevent the popup. NewWindow3 provides additional parameters for if you're looking to inspect the URL or other data about the navigate to actually sometimes block and sometimes handle the popup yourself.
IIRC you can trap the NewWindow2 event on the WebBrowser control and set Cancel = true to prevent the pop-up.
This article may help:
http://www.codeproject.com/KB/cpp/ExtendedWebBrowser.aspx#GoalBlock
Related
I'm using a standard WebBrowser control to perform various automated web requests. I am aware of the default IE 7 setting unless changed by registry, which I have done, and now use a mainly functional version of IE 10 embedded within my program.
Unfortunately, there are times when I need to click JS buttons to add data to the displayed webpage, and other times when there are Modal popups that require me to input information. Webbrowser chokes on this, and for the button, and popup, does nothing.
I am aware of the route of using ScriptInvoke to send my data, but I wondered if there is any way I can avoid this and just use the WebBrowser control as if it where a normal browser, that accepts the two described functions.
Thanks to all,
Stan.
In an ongoing project (Windows, .NET C#) we encountered a bottleneck in our development:
we have to observe the change of the current tab in all major browsers (IE,FF, Chrome, Opera, Safari).
As soon as tab change event has been captured, it must be written to a file.
Is this feasible?
What i finally did was the following:
tracked the EVENT_OBJECT_NAMECHANGE for the Window title
as soon as the title gets changed i know there was something "new" loaded, so i checked for the URL of the browser using various techniques (nDDE for Firefox and Opera, checking for a specific Window Class for Chrome, etc...! Thorsten is right by saying that it's impossible, so i implemented only for the major browsers)
I don't know how this should be done... One thing you could try is to find the window handle of the browser's tab control and hook into it, but that's quite a nasty task. And there's no guarantee that they don't use a custom tab control, so I'd say this can't be done.
Can you give some more information on why you need this? Maybe there's some other solution you didn't think of?
You can combine these two to get what you want:
Is there a way to detect if a browser window is not currently active?
And:
Javascript; communication between tabs/windows with same origin
I've got a WPF application and have a window that contains a System.Windows.Controls.WebBrowser control. I've wired up events like DWebBrowserEvents2_NewWindow2EventHandler, DWebBrowserEvents2_ProgressChangeEventHandler, DWebBrowserEvents2_NavigateComplete2EventHandler, etc.
Opening popup windows using NewWindow2 or NewWindow3 is OK, but I'd really like to be able to respect and implement the underlying window.open() call's features parameter, like the third parameter here:
var newWindow = window.open('http://www.foo.com','myWindow', 'left=20,top=20,width=500,height=500,toolbar=1,resizable=0');
I've read this question and answer, and gone on a 2-day all-out search of the web for a simple(ish) implementation, but all I've really found is the csexwb2 project, which seems like overkill to me. I don't want to totally replace the WebBrowser control with something else. I'd just like to, at a minimum, open popups at the correct size, as specified by the window.open() call.
I simply can't find a simple, decent, complete implementation of INewWindowManager::EvaluateNewWindow using a WebBrowser control in C#. Hasn't anybody had to implement this? I'm stumped.
I have a WPF where I am implementing a WebBrowser control and I have a list of objects that when i select them it changes the url binding for the webBrowser control and all is well.
However, if the web page I am on tries to close the Webpage, a dialog pops up where you can hit yes or no to close the "window" (the WebBrowser control)
If the user hits "yes" then the web browser control is closed and exceptions are thrown when you try to select something else in the list because the window doesn't exist anymore.
The webbrowser control does not have a method for closing exposed where i can get to it and I was able to override the "Window.Close()" method but that also prevented me from closing the main app window.
I have tried inheriting from the WebBrowser class but it is sealed so I can't inherit to add event handlers or override methods such as "Close()" or events such as "OnClosing()"
I have no control over the website because it is a third party product.
Also, the WebBrowser control is not cancelling navigation when exiting.
so my question is
A. Is it possible to intercept the dialog and always answer "no"?
or
B. Is there another way to prevent the WebBrowser control from closing even if the person says "yes" to the dialog?
So, I ended up putting the control in it's separate view and then constructing and destroying the view as a dialogue
Once I had to solve a similar situation. It was a Delphi application, with an embedded TWebBrowser component, which is essentially the same thing as the WebBrowser of .NET. The software automatically clicked on elements of the webpage, and there was a case when after the click a confirm dialog popped up. The simplest way to press the OK button automatically was to call FindWindow with the parameters of the confirm dialog, and use the window handle to send it an Enter key press by calling SendInput. I think in your case an Escape key press is needed.
I've written a c# application which automates an instance of IE. I'd like to know when internet explorer gains focus and when it looses focus.
From the SHDocVw.InternetExplorer object I can get it's HWND. From there how can I create a message hook to receive WM_KILLFOCUS and WM_FOCUS events (assuming those are the correct events to be listening for :))?
Thanks everyone!!
UPDATE: I found a way I could use to accomplish the above goal without using hooks (which I haven't quite figured out how to do in c# yet), using the .NET framework in this question.
The problem with this code
AutomationFocusChangedEventHandler focusHandler
= new AutomationFocusChangedEventHandler(OnFocusChanged);
Automation.AddAutomationFocusChangedEventHandler(focusHandler);
is that it is easy for a window to be the foreground window and that event won't fire when that window is switched to because it's waiting for a specific UI Element to be in focus. (To test this you can use a function that uses that code and prints a message everytime a new window is in focus, such as the MSDN sample TrackFocus, and then click on a webbrowser. When most webpages or a blank page is being displayed in the browser the event wont fire until the address bar or some other element is selected.) It could probably work if there was a way to modify so that it could throw the event if either no UI Element is in focus or every time an element lost focus (instead being thrown when it gains focused). Anyone have any ideas on how I could fix the above code to solve my problem?
Update 2: I just came across this (article claims you can only hook to mouse and keyboard from c#) as well which may mean I can't use hooks at all for what I'd like to do.
Detailed instructions on setting up a hook from C# are here: http://support.microsoft.com/kb/318804/en-us?fr=1