CefSharp.Wpf WebView cannot accept input and the link clicked no response

[Allen-Yao]

Hi,

I used CefSharp.Wpf in my application. version: 1.25.7.

I hosted the webpage via CefSharp WebView. I can host my webpage in it. But the TextBox in the WebView cannot accept the input, and the hyperlink cannot response.

Here is my code. I created a Wpf Usercontrol named WebPageOemViewer.

Xaml:

</Grid>

Code behind:

public partial class WebPageOemViewer : UserControl, IRequestHandler
{
private WebView browser;

    public WebPageOemViewer(string url)
    {
        InitializeComponent();

        CEF.Initialize(new Settings { LogSeverity = LogSeverity.Disable, PackLoadingDisabled = true });

        var browserSettings = new BrowserSettings { ApplicationCacheDisabled = true, PageCacheDisabled = true };

        browser = new WebView(string.Empty, browserSettings)
        {
            Address = url,
            RequestHandler = this,
            Background = Brushes.White
        };

        browser.LoadCompleted += Browser_LoadCompleted;

        CEFJsObjectProcessor processor = new CEFJsObjectProcessor();

        browser.RegisterJsObject("CEFJsObject", processor);

        MainZone.Children.Insert(0, browser);
    }

    public void View(string url)
    {
        if (browser.IsBrowserInitialized)
        {
            browser.Visibility = Visibility.Hidden;

            browser.Load(url);
        }
    }

    public void Close()
    {
        browser.Dispose();

        MainZone.Children.Remove(browser);
    }

    public static void Shutdown()
    {
        Thread.Sleep(1000);

        if (CEF.IsInitialized)
        {
            CEF.Shutdown();
        }
    }

    private void Browser_LoadCompleted(object sender, LoadCompletedEventArgs e)
    {
        Dispatcher.Invoke(new Action(() =>
        {
            browser.Visibility = Visibility.Visible;
        }));
    }

    #region IRequestHandler

    public bool GetAuthCredentials(IWebBrowser browser, bool isProxy, string host, int port, string realm, string scheme, ref string username, ref string password)
    {
        return false;
    }

    public bool GetDownloadHandler(IWebBrowser browser, string mimeType, string fileName, long contentLength, ref IDownloadHandler handler)
    {
        return true;
    }

    public bool OnBeforeBrowse(IWebBrowser browser, IRequest request, NavigationType naigationvType, bool isRedirect)
    {
        return false;
    }

    public bool OnBeforeResourceLoad(IWebBrowser browser, IRequestResponse requestResponse)
    {
        var headers = requestResponse.Request.GetHeaders();

        headers[Constants.Common.HttpHeaderFromKey] = Constants.Common.HttpHeaderFromValue;

        requestResponse.Request.SetHeaders(headers);

        return false;
    }

    public void OnResourceResponse(IWebBrowser browser, string url, int status, string statusText, string mimeType, System.Net.WebHeaderCollection headers)
    {

    }

    #endregion

    internal class CEFJsObjectProcessor
    {
        public event Action<string> Completed;

        private void CompletedInfo(string parameter)
        {
            if (Completed != null)
            {
                Completed(parameter);
            }
        }
    }
}

I host the Usercontrol in a Window named FillUserInfoWindow

Xaml:

</Grid>

Code behind:

public partial class FillUserInfoWindow : Window
{
private WebPageOemViewer _viewer;

    private string _url = string.Empty;

    public FillUserInfoWindow()
    {
        InitializeComponent();
    }

    public FillUserInfoWindow(string url) 
    {
        _url = url;

        InitializeComponent();
    }

    private void FillUserInfoWindow_Loaded(object sender, RoutedEventArgs e)
    {
        Button CloseButton = this.Template.FindName("CloseButton", this) as Button;

        CloseButton.Click += CloseButton_Click;

        if(_viewer != null)
        {
            _viewer.Visibility = Visibility.Visible;
        }

        LoadWebPage(_url);
    }

    private void CloseButton_Click(object sender, RoutedEventArgs e)
    {
        Shutdown();

        Close();
    }

    protected override void OnMouseLeftButtonDown(MouseButtonEventArgs e)
    {
        DragMove();

        base.OnMouseLeftButtonDown(e);
    }

    private void LoadWebPage(string url)
    {
        Application.Current.Dispatcher.Invoke(new Action(() => {

            if (_viewer == null)
            {
                _viewer = new WebPageOemViewer(url);

                MainClient.Children.Insert(0, _viewer);
            }

            _viewer.Visibility = Visibility.Visible;

            _viewer.View(url);

        }));

    }

    public void Shutdown()
    {
        if(_viewer != null)
        {
            _viewer.Close();
        }
    }
}

The webpage will shown in the Window. But the Search Box and hyperlinks no response. Also I tried the latest CefSharp.Wpf. Both cannot work.

string address = "http://www.bing.com";

FillUserInfoWindow fills = new FillUserInfoWindow(address);

fills.ShowDialog();

You can reproduce this issue by the code above. Thanks for your time.

[amaitland]

I used CefSharp.Wpf in my application. version: 1.25.7.

Can you reproduce the problem in the latest release version? 39.0.2. 1.25.7 is no longer supported

[Allen-Yao]

Yes, I can. I am afraid there is some issues in my code. But I cannot figure out.

[amaitland]

I'd start by stripping your code back to the bare minimum. Firstly removing OnMouseLeftButtonDown

[Allen-Yao]

Hi

Thank you very much. I solved this issue by removing OnMouseLeftButtonDown.

You saved me.