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Error when calling Javascript function located in WPF WebBrowser Control from C # code

Based on this solution, I tried to call a JavaScript function located in my WebBrowser . .xaml as follows

 <Grid> <WebBrowser x:Name="browser"/> </Grid>

But neither this code

 public MainWindow() { InitializeComponent(); browser.NavigateToString("<html><script>function callMe() {alert('Hello');} document.myfunc = callMe;</script><body>Hello World</body></html>"); dynamic doc = browser.Document; doc.myfunc(); }

Error

Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: '' mshtml.HTMLDocumentClass 'does not contain a definition for' MyFunc ''

and this code

 public MainWindow() { InitializeComponent(); browser.NavigateToString("<html><script>function callMe() {alert('Hallo');}</script><body>Hello World</body></html>"); browser.InvokeScript("callMe"); }

Error

System.Runtime.InteropServices.COMException: 'Unknown name. (Exception from HRESULT: 0x80020006 (DISP_E_UNKNOWNNAME)) '

do the job.

What am I missing?

Thank you for your help.

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1 answer

Try the following:

 browser.NavigateToString("<html><script>function callMe() {alert('Hello');} document.myfunc = callMe;</script><body>Hello World</body></html>"); browser.LoadCompleted += (s,e) => browser.InvokeScript("callMe");
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Source: https://habr.com/ru/post/1267180/

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