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Rank: Newbie
Groups: Member
Joined: 5/22/2016
Posts: 2
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I'm doing a simple thing, but cannot eval a script. here's the gist of it:
this.View.WebView.LoadHtml("<html><body>Welcome to Utelogy...</body></html>");
System.Threading.Thread.Sleep(4000);
this.View.WebView.EvalScript( "window.alert('Hey, It worked!'",true );
This EvalScript is working in another application all day long, but this I can figure out why it's not working. It tried QueueScripCall, but it went into la-la land. Following is the exception dump.
Thanks for your help.
Exception:
EO.WebBrowser.JSInvokeException: EvalScript failed because script context is not ready. Please use QueueScriptCall instead of EvalScript to execute JavaScript code in this case, or check CanEvalScript property before calling EvalScript.
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Rank: Administration
Groups: Administration
Joined: 5/27/2007
Posts: 24,229
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Hi,
You can not use Thread.Sleep. Try to use LoadHtmlAndWait and see if it works. The browser engine works asynchronously so the internal work must continue in order for the HTML to finish load. Thread.Sleep will block everything thus nothing happens, so immediately after Thread.Sleep finishes, the HTML is guaranteed NOT loaded. LoadHtmlAndWait on the other hand does continue process the internal work of the browser engine.
Thanks!
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Rank: Newbie
Groups: Member
Joined: 5/22/2016
Posts: 2
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Thanks. The Load and Wait didn't work either, but here's the deal. I was doing all this in the construction/loading of my window. Apparently during that time there was some blocking or something affecting this. Ultimately, I used the Dispatcher to perform the work I needed once the dispatcher was idle. Thanks
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Rank: Administration
Groups: Administration
Joined: 5/27/2007
Posts: 24,229
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That makes sense. Load will never finish in constructor either. Internally the WebView relies on windows messages to work. So the window handle has to be created and message pump has to be up and running in order for everything to move ahead.
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