WebKitBrowser.StringByEvaluatingJavaScriptFromString returns no value

Question

I need to get html after all javascripts run.I use WebKit.NET for it and the problem is that WebKitBrowser.StringByEvaluatingJavaScriptFromString doesn't return anything even with simple alert().And when I pass "document.getElementsByTagName('html')[0].outerHTML" (it is actually what I need to get) as the argument it throws the System.AccessViolationException(Attempted to read or write protected memory). And of course I do call StringByEvaluatingJavaScriptFromString in the function that is stick to the DocumentCompleted delegate.I've tried to do the same with WebView in objective-c with the same function StringByEvaluatingJavaScriptFromString and with the same argument "document.getElementsByTagName('html')[0].outerHTML" and it works good as well as it works good with "document.getElementsByTagName('html')[0].outerHTML" in console of the browser. Please help or maybe give alternatives how can I get whole html after runnig all javascripts.

public Form1()
    {
        InitializeComponent();          
        webKitBrowser1.Navigate("http://famous-design.ru/stoly/");

        webKitBrowser1.DocumentCompleted += webKitBrowser1_DocumentCompleted;

    }


    void webKitBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
    {

        string str = webKitBrowser1.StringByEvaluatingJavaScriptFromString("document.getElementsByTagName('html')[0].outerHTML");

    }

why use: document.getElementsByTagName("html")[0] when you could use: document.documentElement — J Davies
– J Davies, Commented Jan 19, 2022 at 12:31

thomasxd24 · Accepted Answer · 2015-04-05 10:43:22Z

1

What i do is i integrate webKitBrowser1.StringByEvaluatingJavaScriptFromString with webKitBrowser1.Document.InvokeScriptMethod :

So you have this:

webKitBrowser1.StringByEvaluatingJavaScriptFromString("function GetElement() {document.getElementsByTagName('html')[0].outerHTML};")
var returnvalue = (string) webKitBrowser1.Document.InvokeScriptMethod("GetElement");

where the return value is returnvalue in the code with the object string (Of course you can change it)

answered Apr 5, 2015 at 10:43

thomasxd24

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Comments

Lars Holm Jensen · Accepted Answer · 2015-08-19 21:19:40Z

0

I got that error too, I tried changing html to body like this:

document.getElementsByTagName('body')[0].outerHTML

Then it worked.

answered Aug 19, 2015 at 21:19

Lars Holm Jensen

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