HybridWebView EvaluateJavaScriptAsync escaping '<' and tab characters

Question

Hi,

I've strange issue, when trying to extract inner html from a WebView I get all '<' characters replaced with '\u003C' and also all tabs as '\t'

This is how I extract inner html:

private async Task<string> GetHtml()
{
return await webView.EvaluateJavaScriptAsync( "document.body.innerHTML" );
}

Any idea how can I avoid this?

Answer 1

Hello,

Welcome to our Microsoft Q&A platform!

Problem is that I want to get original html

From WebView.EvaluateJavaScriptAsync(String) Method, we know that WebView includes the ability to invoke a JavaScript function from C#, and return any result to the calling C# code. For more details, you can check: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/webview?tabs=windows#invoking-javascript .

If you want to get original html, you can use the following code:

    HtmlWebViewSource LoadHTMLFileFromResource()  
    {  
        var source = new HtmlWebViewSource();  

        // Load the HTML file embedded as a resource in the .NET Standard library  
        var assembly = typeof(EvaluateJavaScriptPage).GetTypeInfo().Assembly;  
        var stream = assembly.GetManifestResourceStream("WebViewSample.index.html");              
        using (var reader = new StreamReader(stream))  
        {  
            source.Html = reader.ReadToEnd();  
        }  
        return source;  
    }  

You can refer to document: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/webview?tabs=windows#invoking-javascript

Best Regards,

Jessie Zhang

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