CefSharp - Get Value of HTML Element

Question

How can I get the value of an HTML element with CefSharp?

I know how to do with this default WebBrowser Control:

Dim Elem As HtmlElement = WebBrowser         


        

Answer 1

string script = @"document.getElementById('id_element').style;";
browser.EvaluateScriptAsync(script).ContinueWith(x=> {
    var response = x.Result;
    if (response.Success && response.Result != null)
    {
        System.Dynamic.ExpandoObject abc = (System.Dynamic.ExpandoObject)response.Result;
        foreach (KeyValuePair<string,object> item in abc)
        {
            string key = item.Key.ToString();
            string value = item.Value.ToString();
        }
    }
});

It working for me.

Answer 2

this is the only way that worked for me, version 57.0.0.0..

((CefSharp.Wpf.ChromiumWebBrowser)chromeBrowser).FrameLoadEnd += Browser_FrameLoadEnd;

....

async void Browser_FrameLoadEnd(object sender, CefSharp.FrameLoadEndEventArgs e)
    {            
        Console.WriteLine("cef-"+e.Url);

        if (e.Frame.IsMain)
        {                 
            string HTML = await e.Frame.GetSourceAsync();               
            Console.WriteLine(HTML);
        }
    }

Answer 3

With CefSharp,you can get elements' value by javascript.

For example,

m_browser.ExecuteScriptAsync("document.GetElementById('id1');");

About javascript,you can learn it from w3s.

And I think you should read this passage.

Have fun.

Answer 4

There is a really good example of how to do this in their FAQ.

https://github.com/cefsharp/CefSharp/wiki/Frequently-asked-questions#2-how-do-you-call-a-javascript-method-that-return-a-result

Here is the code for the lazy. Pretty self explanatory and it worked well for me.

string script = string.Format("document.getElementById('startMonth').value;");
browser.EvaluateScriptAsync(script).ContinueWith(x =>
        {
            var response = x.Result;

            if (response.Success && response.Result != null)
            {
            var startDate = response.Result;
            //startDate is the value of a HTML element.
        }      
    });

Answer 5

This worked for me. You can modify it by yourself.

private async void TEST()
{
    string script = "document.getElementsByClassName('glass')[0]['firstElementChild']['firstChild']['wholeText']";
    JavascriptResponse response = await browser.EvaluateScriptAsync(script);
    label1.Text = response.Result.ToString();
}

Maybe this can do your job.

private async void TEST()
{
    string script = "Document.GetElementByID('id').value";
    JavascriptResponse response = await browser.EvaluateScriptAsync(script);
    string resultS = response.Result.ToString(); // whatever you need
}