How to display the webbrowser1?

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im looking on the other tutorials ang they using the webBrowser1 but on mine it did not show up automatically i already added

using System.Windows.Forms;

if i use the

WebBrowser webBrowser1 = new WebBrowser();

to display the webBrowser1 i having error

n exception of type 'System.Threading.ThreadStateException' occurred in System.Windows.Forms.dll but was not handled in user code

Additional information: ActiveX control '8856f961-340a-11d0-a96b-00c04fd705a2' cannot be instantiated because the current thread is not in a single-threaded apartment.

What I have tried:

i look on the youtube and i show up right away the

webBrowser1

can anyone help me thanks in advance

Posted 17-Dec-17 7:46am

Member 13427032

Updated 17-Dec-17 8:22am

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Comments

F-ES Sitecore 17-Dec-17 14:08pm

Have you googled the error message?

RossMW 17-Dec-17 14:21pm

Sounds like an issue with your computer / software setup. Try going back to the basics. Can you create a blank project and add a webbrowser object to it with no atatched code and run it? If not, then you have an issue with your environment. If you can run it, then you need to start looking experimenting with basic code to run the webrowser.

Richard Deeming 18-Dec-17 14:47pm

Find your Main method, and make sure it has the [STAThread] attribute on it.

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Dave Kreskowiak · Answer 1 · 2017-12-17T08:22:00

Solution 1

OK, why did you have to add a reference to System.Windows.Forms? This must not be a Windows Forms app to start with and that's probably what's causing this problem. What kind of app did you start with? Console, WPF, ASP.NET, ... ? What?

Posted 17-Dec-17 8:22am

Dave Kreskowiak

Comments

[no name] 17-Dec-17 15:02pm

"This must not be a Windows Forms app to start with and that's probably what's causing this Problem": Why WebBrowser should not be used in WinForm, I did this more than one time? What I'm missing?

Dave Kreskowiak 17-Dec-17 15:41pm

Because different project types start with different threading models. Also, things like an ASP.NET project should NEVER use the WebBrowser control.

[no name] 17-Dec-17 15:43pm

But why you are thinking this is ASP.NET?

Dave Kreskowiak 17-Dec-17 15:56pm

Because other noobs have attempted it and, in this case, he said he explicitly added the import for System.Windows.Forms.

[no name] 17-Dec-17 15:57pm

I don't get it, not a big Thing...

Dave Kreskowiak 17-Dec-17 16:01pm

Because the WebBrowser control is an instance of IE. It's a very heavy control that REQUIRES a Form in order to work. That's overkill for a web server that may need to retrieve data from another URL. There are other faster, lighter weight options to do that.

[no name] 17-Dec-17 16:07pm

Agree on that. But I think OP is just trying to get familiar with the Basics.