Working with Web. Browser in WPF. This article demonstrates how you can use Web. Browser control to show html document within your WPF application. You will find the basic usage of powerful Web. Browser control that comes with WPF. A sample application is also provided to demonstrate each of these. Introduction. WPF introduces Web. Browser control to ensure that we can show html pages embedded inside the control. It is really very important to know how to use a Web. Browser as while working with WPF, if you want to show content from the server as HTML, or load an html document directly inside the WPF window, this control will be the only option to you. A Web. Browser control actually uses Internet Explorer Browser Engine internally, so you need it to be installed in the machine (which of course every machine installs by default ) before loading it inside the WPF control. So if you update the IE of your machine, the web browser will update as well. In this article I will discuss the basic usage of WPF Web. Browser control, so that the use of this would come to you very easy. Basic Usage. It is very easy to use Web. Browser control in your WPF application. In your XAML you may include < Web. Browser x: Name=. Now to load a document, either you have to navigate to a site or directly load the document from your application. Lets for instance,wb. Main. Navigate. To. String(. So basically you need to pass an html body directly to the Web. Browser control using this method as string. On the other hand, if you like to do the same thing using Stream, you might go for Navigate. To. Stream which takes a Stream as method argument and loads it. Uri uri = new Uri(@. You can also go for normal urls to load this rather than using the Content url using this. Similar to this, you can also load data from a file located in your hard drive. To do this, you might either read the entire file into a string/stream, using the method I have provided earlier, or you can load the entire data in your webbrowser control. You can also use the general method Navigate to navigate your page to any location directly using either unc path or normal web address. So say I write : wb. Main. Navigate(new Uri(. Similarly you can also use wb. Main. Navigate(new Uri(. It is always better to use Can. Go. Back and Can. Go. Forward to check whether the navigation is possible or not before using Go. Back or Go. Forward. Theme a Web. Browser. Theme a Web. Browser means actually theme the web document. Web document can be themed only using html. You need to know basic html styles to theme a document inside the Web. Browser. For instance you might use CSS to change the color of the Scroll. Bar that suits your Application. For further knowledge, you can read on CSS and htmls. Overcoming Security warning in Web. Browser. This is not the end of this. There are lots of things that you can do using the WPF web browser control. For instance, the most general issue that everybody face while loading an html file with full javascript control is the trust panel. According to the settings that you might have implied to your internet explorer browser, it might not trust a disk html file directly in your web browser. Say for instance, I have a file which shows a javascript alert when the page is loaded. Now if I load the page using wb. FileDownload Event.NET Framework (current version) Other Versions Visual Studio 2010.NET Framework 4 Visual Studio 2008.NET Framework 3.5.NET Framework 3.0.NET Framework 2.0 Occurs when the WebBrowser control downloads a file. My Windows Forms application uses the WebBrowser control to open an Excel file since OLE objects are gone in.Net. Avoiding the 'File download' dialog when using the WebBrowser control to navigating to an excel file (C#/Windows Forms). Guys does anyone know how to intercept file downloads on a webbrowser control, and stop them from popping up? Meanwhile C# programmers will get paid just a little bit more than you for writing exactly the same code and VB6 programmers will continue to. This C# article covers the WebBrowser control in Windows Forms. Main. Navigate(new Uri(. To overcome this, you need to either load the html as content stream or write < !- - saved from url=(0. This will instruct that the page is loaded from about: internet and will not display the Security warning. As about: internet uses 1. You can also use < !- - saved from url=(0. The url takes 1. 9 letters, so I specified it as 1. Attached project is a Web Browser application developed using C# 2.0. Download and check it out. Feel free to contact me or post comments about this project. I have used Windows Forms to develop this application. The Browser control is used to display Web. Access Javascript from WPF Web. Browser. Accessing javascript from the webbrowser or invoking a . NET object can be done very easily using WPF Web. Browser control. Invoke C# method from Javascript. Communication between html document and WPF requires you to have full trust between the applications. In javascript, window. Web. Browser. To do this you need to create an interface between the two. A helper method should be used to which could be accessed directly using Javascript. Let us look how we can achieve this using WPF Web. Browser Control. This helper class is set Permission to Full. Trust and also Com. Visible. So our Web. Browser, which is actually a Com element can directly communicate with the class to invoke method within the class Object. For. Scripting. Helper, which is the parent window on which the browser is loaded. The javascript will allow to use window. To use this class you need to create an object of it and pass it to the property Object. For. Scripting of Web. Browser control. So I write,Object. For. Scripting. Helper helper = new Object. For. Scripting. Helper(this). Main. Object. For. Scripting = helper. Now Lets navigate to an html with : < input type=. See in the code above, I have used window. I have declared in the Object. For. Script. Helper class. Thus when you click on the Button inside the Web. Browser, you will see the message been displayed in the Text. Block outside it. In the above image, when the user clicks on Invoke. Me inside the Web. Browser, it will update the Text. Block placed outside. Invoke Javascript method from C#Now it is time to do the reverse. Lets suppose you want to invoke a javascript method from C#. This is also can easily be done using Invoke. Script method. The Invoke. Script method of Web. Browser control allows you to pass data from the external WPF application to the document loaded in the Web. Browser. Let us take a look at how you can do this. Write. From. External(message). Now to invoke this method, you need to usethis. Main. Invoke. Script(. I hope you like this article very much. Any feedback is welcome.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
January 2017
Categories |