How Can Execute Javascript Commands via GeckoFX

Question

I try to execute a javascript command like alert('test message') via GeckoFX and C# but I can not.

I try without results with Navigate and with ExecuteCommand

My code is

    int i=0;    
    GeckoWebBrowser webBrowser
    webBrowser.Navigate("alert('"+i.ToString()+"');");
    webBrowser.ExecuteCommand("alert('" + i.ToString() + "');");

Can anyone help me?

score 7 · Accepted Answer · answered Jul 23 '13 at 13:53

7

You can use AutoJSContext to run javascript with geckofx.

Something like:

GeckoWebBrowser browser = ....;

using (AutoJSContext context = new AutoJSContext(browser.JSContext))
{                               
   string result;
   context.EvaluateScript("3 + 2;", out result)
}

See EvaluateScript unittests for more info and examples.

If you are using a super old version of geckofx you may need to get a later version - geckofx

answered Jul 23 '13 at 13:53

Tom

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I am using version 16.0.0.2 – A. Zalonis Jul 23 '13 at 14:21
1

@Tom I know this is old, but Im trying to use this code and I have an error. 'Gecko.GeckoWebBrowser does not contain a definition for 'JSContext' and no extension method 'JSContext' accepting a first argument of type Gecko.GeckoWebBrowser could be found'..What Am I missing?.. – skram Oct 18 '13 at 14:32
5

Starting in version 22, you'll need browser.Window.JSContext. – John Hatton Oct 18 '13 at 19:22
4

In version 45 it's just `browser.Window` – Leonid Vasilev Apr 05 '16 at 11:57
i didnt found that way in vb.net any clue? @JohnHatton – gumuruh Mar 03 '17 at 00:23
1

@gumuruh Don't know what to tell you about vb.net. You can see current c# examples in the [v45 unit tests](https://bitbucket.org/geckofx/geckofx-45.0/src/e8f5556a5c02381184d312492962bd169ec3a401/GeckofxUnitTests/GeckoWebBrowserTests.cs?at=default&fileviewer=file-view-default) – John Hatton Mar 03 '17 at 23:39

score 3 · Answer 2 · answered Dec 28 '18 at 08:40

3

for the new versions instead of geckoWebBrowser1.JSContext you should write geckoWebBrowser1.Window

my code is working and I've answered with sample in another old post here

answered Dec 28 '18 at 08:40

Arash.Zandi

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score 0 · Answer 3 · answered Jan 18 '19 at 14:12

0

You can use Navigate method to avoid AccessViolatoinException during calling document js function:

webView.Navigate("javascript:$$external.consoleLog('message text');");

answered Jan 18 '19 at 14:12

Przemysław Michalski

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How Can Execute Javascript Commands via GeckoFX

3 Answers3

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