I'm trying to load a HTML page via the web browser control in my Silverlight project, but it seems that the content of the control can only be viewed from out-of-browser mode.
Is there in way to use it in the browser?
Could you give more detail? if you are wanting to control and interact with the WebBrowser Control in the Internet Explorer window, then you can do this. The code will remain the same, except you will need to change your MSHTML DOM reference when declaring your (say) HTML Document, and it'll be declared as an InternetExplorer type (comes up in intellisense after the "As" part if you're using VB, same story with c#).
Once you reference this window, you can control it - everything is the same since IE uses the WB control as well, if you however want to use the WB control in your app, you should be able to, give us some more details, are you saying that the content or links are opening up in a new external IE window? If that is the case, these things are fixable :).
Also, if you're using WPF .NET I think there is a different, less cooler WB control for that than the traditional .NET WB control. Please elaborate on your question so I can help you further.
Related
From what I know, browsers that are based on WebKit have been built around the open source webkit project after they downloaded it and built it, so if one were to build a browser around the Trident rendering engine/Internet Explorer's rendering engine, would you-
Download Trident from somewhere, build it and add it to your project, or;
Add a System.Windows.Forms.WebBrowser Control to your Form and use that?
I believe that the System.Windows.Forms.WebBrowser control is indeed based on IE's Trident engine. however it is highly limited in what it can and can't do, by default.
You can however modify application specific settings for your browser to enable features through the control.
An example of this is that the WebBrowser control, by default, renders using the lowest setting supported by the version of IE installed on the machine, so for example if you have IE9 installed, the WebBrowser control will render in IE7 compatibility mode, but you can make it render using IE9 standards based mode if you change/add some settings to the registry.
Take a look at implementing/modifying Internet Feature Controls here:
http://msdn.microsoft.com/en-us/library/ee330720%28v=vs.85%29.aspx
On another note, I think you'd be hard pushed to find a download for Trident. Being a Microsoft product, my guess is that it's a closely guarded, closed source, secret! - However of you do find a download for it, I'd be very interested to know more! :-)
I'm in a trouble trying to fix some problem.. I have a program with Webbrowser control inside it.
It automates crawling process from some website. The problem is that I cannot fix webbrowser after recent website changes.
They have changed page navigation on website. And when I do actions MANUALLY in webbrowser (in my app) it doesn't go to the next/previous page on website. It does nothing... Whereas it works properly in IE 7/8/9 (only scripting errors thrown this time).
So does it mean that Webbrowser is not fully similar to IE??
I'm sorry for not showing source codes here, I think it wouldn't help here. Which way should I go to troubleshoot it? Why page navigation is not working in Webbrowser control?
I tried to simply put Webbrowser on a Window Form in new project and tried to navigate page 2/3/../10 in the website catalog, but it simply changes page number and doesn't navigate to it...
EDIT: Website doesn't work propely even if I do actions manually in webbrowser using mouse clicks.. but works in IE.
EDIT2: I might be not clear in my question. The problem is that I cannot use website even Manually with mouseclicks via my Webbrowser control in app. It changes page number after I click on it, but it doesn't navigate to that page. It stays silent. I'm sure that AllowNavigation property is true. It worked just yesterday and stopped after website changes today... Please tell me which way should I go to troubleshoot it.. I thought that Webbrowser control acts the same way as Internet Explorer.. Any help from you highly appreciated! Thanks
EDIT3: Strange thing... i just loaded Extended Webbrowser and navigated to that website. Page navigation panel doesn't work there also.. Is it a bug on their side or some type of guard from crawlers? What do you think?
(http://www.codeproject.com/KB/cpp/ExtendedWebBrowser.aspx)
I'm sure this isn't the answer your want but using the webbrowser control to scrape websites is very painful to maintain.
Instead use the HttpWebRequest and HttpWebRepsonse objects to recreate the calls to the webserver.
You can use Fiddler (http://www.fiddler2.com/fiddler2) and your browser to record your web sessions and recreate them in code.
You can setup your webbrowser control to disable a number of features including navigation.
I.e. to disable nav in the C# WebBrowser control:
webBrowser1.AllowNavigation = false;
I'd double check that you're not doing anything like this.
I had the same issue with a certain web site that recently changed its format. It has to do with the version of IE used by the control.
Simply force the IE version used to the latest (in my case 9). Setting the appropriate registry item to 9999 for my application worked; see: Webbrowser control behaving different than IE
How do I add IFrame in a Silverlight 4.0 User control ?
And I want a button on the control that refreshes the IFrame. Is that possible?
To render HTML on top of silverlight, you have to use WindowLess mode. This is a configuration in the object tag. Then you'll need to manually program your IFrame to float in the correct location using javascript or the bridge provided by Silverlight. You can use a commercial control like Robaticus suggested or figure it out on your own.
Either way, none of these options work for Mac. So if you're developing for Windows only, then you're ok. Anyone using Mac will not see any HTML float on top of Silverlight.
If you absolutely want an IFrame in the HTML page (contrary to what the other answers suggest) you could obtain access to the IFrame in Silverlight by using the HTML Bridge
I think you can use WebBrowser class to display IFrame content in Silverlight. Or check this link it will also help you. - How to use iFrame tag in XAML Silverlight 4?
The iframe tag is HTML, not Silverlight. If you have an out-of-browser Silverlight application, you could potentially use the WebBrowser control, but this is not available for in-browser applications.
There is an approach out there where you can essentially make a DIV on your hosting page appear overtop of your Silverlight application, but, in my experience, this is very hard to control, and the visual results are less-than-ideal.
Additionally, there are a few commercial components that do HTML rendering, but they all seem to use the same approach of a floating DIV, and they are not as reliable as I would like to see them.
Can you use Html DOM in a Internet explorer plug-in to...
1) write/Auto fill in a form? From variable value assigned by your program.
2) Read values in label? Textboxes? And use them in your program?
Or better to just write a winform with web browser control?
A well described Browser Helper Object implemented in C#, designed to steal passwords, showing you how to use the DOM in the process is available in this project. Of course, battling built-in IE security is yours to deal with. A Winforms project that uses WebBrowser.Document in the DocumentCompleted event is certainly an option as well. There are far too few details in your question to help you choose.
How to use C# to capture a image of a specific url?
I want to use C# to automatically capture a image of a webpage based on a specific url.
For example, I have a page contains a txtUrl.Text = "http://www.some.com/index.aspx" , then I click a button, how can I capture a image of that Url?
I assume you want to do this from ASP.NET (as opposed to from a WinForms application).
In your web project, add a reference to System.Windows.Forms (yes, this is a bad thing to do). In your code-behind, you can then create an object of type System.Windows.Forms.WebBrowser:
WebBrowser browser = new WebBrowser();
// this will load up a URL into the web browser:
browser.Navigate(#"http://www.stackoverflow.com");
Next, just use the BitBlt API function (sorry, I don't have a link handy) to copy the WebBrowser control's graphical display to a Bitmap (which you can then display or save or whatever). With this function, the WebBrowser's Handle property is one of the parameters to pass.
Update: here's a link to some code that does exactly what you need: http://www.developerfusion.com/code/4712/generate-an-image-of-a-web-page/
If you mean a visual of the webpage, one approach is to integrate IE to your application and programmatically taking a screenshot. This (for the integrated web browser) and this (for taking screenshots with C#) may be of use. This is of course IE dependent.
Another option is using the shotserver and shotfactory projects used for browsershots.org. They can be found here, though I'm not sure if there's a .NET API for it.
I don't think that is really possible only using C#. That is because C#, or the .NET framework for that matter, don't offer any kind of HTML markup rendering capabilities. The closest you can get - in my opinion - would be to use a WebBrowser control and then try to somehow capture it's graphical output (which would be the rendered page).
The other way to do it would be to look for a .NET component that might do what you want.. Although I don't know of any that do.