/// <summary>
/// This is the click handler for the 'FireScript' button.
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void FireScript_Click(object sender, RoutedEventArgs e)
{
if (NavToString.IsChecked == true)
{
// We can run script that uses window.external.notify() to send data back to the app
// without having to set the AllowedScriptNotifyUris property because the app is
// trusted and it owns the content of the script.
WebView4.InvokeScript("SayGoodbye", null);
}
else
{
if (Nav.IsChecked == true)
{
// Here we have to set the AllowedScriptNotifyUri property because we are navigating
// to some actual site where we don't own the content and we want to allow window.external.notify()
// to pass back data to our application.
List <Uri> allowedUris = new List <Uri>();
allowedUris.Add(new Uri("http://www.bing.com"));
WebView4.AllowedScriptNotifyUris = allowedUris;
// Notice that this is fairly contrived but for this example to work we need to be
// able to navigate to a real site, but since this site does not have a function that
// we can call that actually uses window.external.notify() we have to inject that into
// the page using eval(). See the next scenario for more information on this technique.
string[] args = { "window.external.notify('GoodBye');" };
WebView4.InvokeScript("eval", args);
}
else
{
rootPage.NotifyUser("Please choose a navigation method", NotifyType.ErrorMessage);
}
}
}
private void NavToString_Click(object sender, RoutedEventArgs e)
{
rootPage.NotifyUser("", NotifyType.StatusMessage);
// Let's create an HTML fragment that contains some javascript code that we will fire using
// InvokeScript().
string htmlFragment =
@"
<html>
<head>
<script type='text/javascript'>
function SayGoodbye()
{
window.external.notify('GoodBye');
}
</script>
</head>
<body>
Page with 'Goodbye' script loaded. Click the 'Fire Script' button to run the script and send data back to the application.
</body>
</html>";
// Load the fragment into the HTML text box so it will be visible.
HTML4.Text = htmlFragment;
WebView4.NavigateToString(HTML4.Text);
}
private void Nav_Click(object sender, RoutedEventArgs e)
{
rootPage.NotifyUser("", NotifyType.StatusMessage);
WebView4.Navigate(new System.Uri("http://www.bing.com"));
}
