Why doesn't UWP WebView AddWebAllowedObject work?

Question

I'm trying to use the WebView's AddWebAllowedObject method but, at runtime, an error is returned when is invoked the function that uses it. Am I doing something wrong? Thanks in advance.

Notes: Dial class is contained in runtime project.

    [AllowForWeb]
    public sealed class Dial
    {
        public void Greet()
        {
            Debug.WriteLine("Hello!");
        }
    }

    public sealed partial class MainPage : Page
    {
        public MainPage()
        {
            InitializeComponent();
        }

        private void WebView_Loaded(object sender, RoutedEventArgs e)
        {
            wv.NavigateToString("" +
                "<html>" +
                "<head>" +
                "<script>function hi() { dial.Greet(); }</script>" +
                "</head>" +
                "<body>" +
                "</body>" +
                "</html>"
            );
        }

        private void WebView_NavigationStarting(WebView sender, WebViewNavigationStartingEventArgs args)
        {
            wv.AddWebAllowedObject("dial", new Dial());
        }

        private async void WebView_DOMContentLoaded(WebView sender, WebViewNavigationStartingEventArgs args)
        {
            await wv.InvokeScriptAsync("hi", new string[] {}); // Error 0x80020101
        }
    }

Answer 1

By testing, you need to call the Greet() method of Dial class in lowercase in your html content as in this document .

private void WebView_Loaded(object sender, RoutedEventArgs e)
{
    wv.NavigateToString("" +
        "<html>" +
        "<head>" +
        "<script>function hi() { dial.greet(); }</script>" +
        "</head>" +
        "<body>" +
        "</body>" +
        "</html>"
    );
}

Why doesn't UWP WebView AddWebAllowedObject work?

Question

1 answers

solution1
1 ACCPTED 2020-08-03 03:20:50

Why doesn't UWP WebView AddWebAllowedObject work?

Question

1 answers

solution1 1 ACCPTED 2020-08-03 03:20:50

solution1
1 ACCPTED 2020-08-03 03:20:50