Question

190

How to handle Javascript events via WebBrowser control for WinForms

rated 0 times [ 191] [ 1] / answers: 1 / hits: 26315 / 14 Years ago, wed, march 2, 2011, 12:00:00

I have read WebBrowser Control from .Net — How to Inject Javascript, Is it possible to call Javascript method from C# winforms and many others. Those examples were returns function value or alert window (synchronous calls). I have to get result from event handler (async call):

<script type=text/javascript>

        window.onload = function() {

            var o = new M.Build(document.getElementById(ZID));



            M.Events.observe(o, o.Events.Success, function() {

                // I have to get some value!!

            });



            M.Events.observe(o, o.Events.Fault, function() {

                // I have to get some value!!

            });

        }

    </script>

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harleyterryp

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answered 14 Years ago tiffany · Accepted Answer

Calling C# from JavaScript

Simply put, you can expose a C# object
to the WebBrowser that the JavaScript
can call directly The WebBrowser
class exposes a property called
ObjectForScripting that can be set by
your application and becomes the
window.external object within
JavaScript. The object must have the
ComVisibleAttribute set true

C#:

 [System.Runtime.InteropServices.ComVisibleAttribute(true)]

    public class ScriptInterface

    {

        public void callMe()

        {

            … // Do something interesting

        }

    }



    webBrowser1.ObjectForScripting = new ScriptInterface();

Javascript:

window.external.callMe();

Calling JavaScript in a WebBrowser control from C#