WPF WebBrowser control - how to suppress script er

2楼-- · 2019-01-02 15:36

Here is an example of how to do this without using reflection.

    /// <summary>
    /// Gets an interop web browser.
    /// </summary>
    /// <param name="browser"></param>
    /// <returns></returns>
    public static SHDocVw.WebBrowser GetInteropWebBrowser(this WebBrowser browser)
    {
        Guid serviceGuid = new Guid("0002DF05-0000-0000-C000-000000000046");
        Guid iid = typeof(SHDocVw.IWebBrowser2).GUID;
        Interop.IServiceProvider serviceProvider = (Interop.IServiceProvider)browser.Document;
        SHDocVw.IWebBrowser2 browser2 = (SHDocVw.IWebBrowser2)serviceProvider.QueryService(ref serviceGuid, ref iid);
        SHDocVw.WebBrowser wb = (SHDocVw.WebBrowser)browser2;

        return wb;
    }

    /// <summary>
    /// Disables script errors for the browser.
    /// </summary>
    /// <param name="browser"></param>
    /// <param name="silent"></param>
    public static void SetSilent(this WebBrowser browser, bool silent)
    {
        SHDocVw.WebBrowser browser2 = browser.GetInteropWebBrowser();
        if (browser2 != null)
            browser2.Silent = silent;
    }

/// <summary>
/// Provides the COM interface for the IServiceProvider.
/// </summary>
[ComImport, Guid("6D5140C1-7436-11CE-8034-00AA006009FA"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IServiceProvider
{
    /// <summary>
    /// Queries the service.
    /// </summary>
    /// <param name="serviceGuid"></param>
    /// <param name="riid"></param>
    /// <returns></returns>
    [return: MarshalAs(UnmanagedType.IUnknown)]
    object QueryService(ref Guid serviceGuid, ref Guid riid);
}

Then in the constructor for the view that hosts the Browser control you have:

            Browser.Navigated += (s, e) =>
            {
                Browser.SetSilent(true);
            };

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琉璃瓶的回忆

3楼-- · 2019-01-02 15:36

Really very simple, thank you for your solution.

http://social.msdn.microsoft.com/Forums/en-US/6996b0c5-b44d-4040-9dbe-6206b1d9185e/webbrowser-script-error-when-using-google-maps?forum=wpf&prof=required

Dim sb As New StringBuilder
sb.Append("<html>")
sb.Append("<head>")
sb.Append("</head")
sb.Append("<body>")

sb.Append("<iframe src ='" + url + "' height='" + webBrowser1.Height + "' width='" + webBrowser1.Width + "'></iframe>")

sb.Append("</body")
sb.Append("</html>")

WebBrowser1.DocumentText = sb.ToString

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步步皆殇っ

4楼-- · 2019-01-02 15:39

Thanks to Simon Mourier for elegant way to solve this problem. I made a little improvement and encapsulated Simon's solution into attached property.

In my application I use WebBrowser control databounded to viewmodel, the webbrowser might be hidden on inactive TabItem, so I have to check that it has been Loaded and Navigated before setting javascript errors silent. And of cource this setting should be done just once, so after setting I release hooked events.

XAML Code:

<TabControl xmlns:b="clr-namespace:MyApplication.Behaviors">
  <TabItem Header="foo">...</TabItem>
  <TabItem Header="Google map">
    <WebBrowser b:BindableSource="{Binding Path=MapUrl}"
                b:DisableJavascriptErrors="True" />
  </TabItem>
</TabControl>

Behavior code:

using System;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Navigation;

namespace MyApplication.Behaviors
{
    public class WebBrowserBehavior
    {
        private static readonly Type OwnerType = typeof (WebBrowserBehavior);

        #region BindableSource

        public static readonly DependencyProperty BindableSourceProperty =
            DependencyProperty.RegisterAttached(
                "BindableSource", 
                typeof(string), 
                OwnerType, 
                new UIPropertyMetadata(OnBindableSourcePropertyChanged));

        [AttachedPropertyBrowsableForType(typeof(WebBrowser))]
        public static string GetBindableSource(DependencyObject obj)
        {
            return (string)obj.GetValue(BindableSourceProperty);
        }

        [AttachedPropertyBrowsableForType(typeof(WebBrowser))]
        public static void SetBindableSource(DependencyObject obj, string value)
        {
            obj.SetValue(BindableSourceProperty, value);
        }

        public static void OnBindableSourcePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var browser = d as WebBrowser;
            if (browser == null) return;

            browser.Source = (e.NewValue != null) ? new Uri(e.NewValue.ToString()) : null;
        }

        #endregion

        #region DisableJavascriptErrors

        #region SilentJavascriptErrorsContext (private DP)

        private static readonly DependencyPropertyKey SilentJavascriptErrorsContextKey =
            DependencyProperty.RegisterAttachedReadOnly(
                "SilentJavascriptErrorsContext",
                typeof (SilentJavascriptErrorsContext),
                OwnerType,
                new FrameworkPropertyMetadata(null));

        private static void SetSilentJavascriptErrorsContext(DependencyObject depObj, SilentJavascriptErrorsContext value)
        {
            depObj.SetValue(SilentJavascriptErrorsContextKey, value);
        }

        private static SilentJavascriptErrorsContext GetSilentJavascriptErrorsContext(DependencyObject depObj)
        {
            return (SilentJavascriptErrorsContext) depObj.GetValue(SilentJavascriptErrorsContextKey.DependencyProperty);
        }

        #endregion

        public static readonly DependencyProperty DisableJavascriptErrorsProperty =
            DependencyProperty.RegisterAttached(
                "DisableJavascriptErrors",
                typeof (bool),
                OwnerType,
                new FrameworkPropertyMetadata(OnDisableJavascriptErrorsChangedCallback));

        [AttachedPropertyBrowsableForType(typeof(WebBrowser))]
        public static void SetDisableJavascriptErrors(DependencyObject depObj, bool value)
        {
            depObj.SetValue(DisableJavascriptErrorsProperty, value);
        }

        [AttachedPropertyBrowsableForType(typeof(WebBrowser))]
        public static bool GetDisableJavascriptErrors(DependencyObject depObj)
        {
            return (bool)depObj.GetValue(DisableJavascriptErrorsProperty);
        }

        private static void OnDisableJavascriptErrorsChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            var webBrowser = d as WebBrowser;
            if (webBrowser == null) return;
            if (Equals(e.OldValue, e.NewValue)) return;

            var context = GetSilentJavascriptErrorsContext(webBrowser);
            if (context != null) {
                context.Dispose();
            }

            if (e.NewValue != null) {
                context = new SilentJavascriptErrorsContext(webBrowser);
                SetSilentJavascriptErrorsContext(webBrowser, context);
            }
            else {
                SetSilentJavascriptErrorsContext(webBrowser, null);
            }
        }

        private class SilentJavascriptErrorsContext : IDisposable
        {
            private bool? _silent; 
            private readonly WebBrowser _webBrowser;


            public SilentJavascriptErrorsContext(WebBrowser webBrowser)
            {
                _silent = new bool?();

                _webBrowser = webBrowser;
                _webBrowser.Loaded += OnWebBrowserLoaded;
                _webBrowser.Navigated += OnWebBrowserNavigated;
            }

            private void OnWebBrowserLoaded(object sender, RoutedEventArgs e)
            {
                if (!_silent.HasValue) return;

                SetSilent();
            }

            private void OnWebBrowserNavigated(object sender, NavigationEventArgs e)
            {
                var webBrowser = (WebBrowser)sender;

                if (!_silent.HasValue) {
                    _silent = GetDisableJavascriptErrors(webBrowser);
                }

                if (!webBrowser.IsLoaded) return;

                SetSilent();
            }

            /// <summary>
            /// Solution by Simon Mourier on StackOverflow
            /// http://stackoverflow.com/a/6198700/741414
            /// </summary>
            private void SetSilent()
            {
                _webBrowser.Loaded -= OnWebBrowserLoaded;
                _webBrowser.Navigated -= OnWebBrowserNavigated;

                // get an IWebBrowser2 from the document
                var sp = _webBrowser.Document as IOleServiceProvider;
                if (sp != null)
                {
                    var IID_IWebBrowserApp = new Guid("0002DF05-0000-0000-C000-000000000046");
                    var IID_IWebBrowser2 = new Guid("D30C1661-CDAF-11d0-8A3E-00C04FC9E26E");

                    object webBrowser2;
                    sp.QueryService(ref IID_IWebBrowserApp, ref IID_IWebBrowser2, out webBrowser2);
                    if (webBrowser2 != null)
                    {
                        webBrowser2.GetType().InvokeMember(
                            "Silent",
                            BindingFlags.Instance | BindingFlags.Public | BindingFlags.PutDispProperty,
                            null,
                            webBrowser2,
                            new object[] { _silent });
                    }
                }
            }

            [ComImport, Guid("6D5140C1-7436-11CE-8034-00AA006009FA"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
            private interface IOleServiceProvider
            {
                [PreserveSig]
                int QueryService([In] ref Guid guidService, [In] ref Guid riid, [MarshalAs(UnmanagedType.IDispatch)] out object ppvObject);
            }

            public void Dispose()
            {
                if (_webBrowser != null) {
                    _webBrowser.Loaded -= OnWebBrowserLoaded;
                    _webBrowser.Navigated -= OnWebBrowserNavigated;
                }
            }
        }

        #endregion

    }
}

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公子世无双

5楼-- · 2019-01-02 15:40

You can look at my solution: Disabling JavaScript errors in WebBrowser control in Silverlight - it's for Silverlight but should also work for WPF.

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浅入江南

6楼-- · 2019-01-02 15:41

I've also found an interesting way to disable JavaScript errors. But you need to use at least .Net Framework 4.0 because of using elegant dynamic type.

You need to subscribe to the LoadCompleted event of the WebBrowser element:

<WebBrowser x:Name="Browser" 
            LoadCompleted="Browser_OnLoadCompleted" />

After that you need to write an event handler that looks like below:

    void Browser_OnLoadCompleted(object sender, NavigationEventArgs e)
    {
        var browser = sender as WebBrowser;

        if (browser == null || browser.Document == null)
            return;

        dynamic document = browser.Document;

        if (document.readyState != "complete")
            return;

        dynamic script = document.createElement("script");
        script.type = @"text/javascript";
        script.text = @"window.onerror = function(msg,url,line){return true;}";
        document.head.appendChild(script);
    }

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忆尘夕之涩

7楼-- · 2019-01-02 15:43

Thought it'd be relevant to add here. There is another option to get to the WPF WebBrowser's underlying WebBorwser ActiveX Control and its otherwise inaccessible methods and events. I just discovered it a few days ago. It's very simple and doesn't require initial navigation on WB:

dynamic activeX = this.WB.GetType().InvokeMember("ActiveXInstance",
                    BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.NonPublic,
                    null, this.WB, new object[] { });

activeX.Silent = true;

Of course, there's a chance this method may not work in future version of the Framework, but so is true about any other undocumented method. So far, it's been there since .NET 3.0. More details with a working code sample here.

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WPF WebBrowser control - how to suppress script er

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