禁用WebBrowser控件中的JavaScript错误

105

我正在开发带有WebBrowser控件的Windows应用程序，该控件可导航到共享点站点。
我的问题是我遇到了JavaScript错误。

如何禁用JavaScript错误？我不希望他们弹出。

c#  .net  winforms  webbrowser-control 
— 加比
source
这救了我的一天。真的...
— NANDAKUMAR '16

Answers:

219 
webBrowser.ScriptErrorsSuppressed = true;
— 马特·雅各布森
source
2
谢谢队友，为我节省了很多时间！
— TheGateKeeper 2012年
7
作为记录，该属性在后台执行this.AxIWebBrowser2.Silent = true;
— redcalx13 2013年
12
还应该补充一点，this.AxIWebBrowser2.Silent = true抑制所有弹出窗口，而不仅仅是脚本错误，因此WebBrowser.ScriptErrorsSuppressd似乎被错误命名。
— redcalx13 2013年
1
谁能告诉我该在哪里写这段代码？请帮助！！
— Har devgun
1
这将删除所有弹出式窗口，包括登录框。最好是使用redclax所做的事情
— Goozo '16
53

这将禁用脚本错误，也将禁用其他窗口，例如NTLM登录窗口或客户端证书接受窗口。下面将仅禁止javascript错误。

// Hides script errors without hiding other dialog boxes.
private void SuppressScriptErrorsOnly(WebBrowser browser)
{
    // Ensure that ScriptErrorsSuppressed is set to false.
    browser.ScriptErrorsSuppressed = false;

    // Handle DocumentCompleted to gain access to the Document object.
    browser.DocumentCompleted +=
        new WebBrowserDocumentCompletedEventHandler(
            browser_DocumentCompleted);
}

private void browser_DocumentCompleted(object sender, 
    WebBrowserDocumentCompletedEventArgs e)
{
    ((WebBrowser)sender).Document.Window.Error += 
        new HtmlElementErrorEventHandler(Window_Error);
}

private void Window_Error(object sender, 
    HtmlElementErrorEventArgs e)
{
    // Ignore the error and suppress the error dialog box. 
    e.Handled = true;
}
— 杰米格斯
source
这应该有更多的支持，这绝对是正确的方法。能够记录错误或显示您自己的通知而不是从不知道它们曾经发生过（例如，信息亭应用程序）的好处。
— Mike Marynowski 2012年
4
在我的测试中，我发现在触发DocumentCompleted事件之前出现了脚本错误对话框。但是，如果将WebBrowser.Document.Window.Error处理程序附加为对Navigated和FileDownloaded事件的响应，则可以抑制大多数（如果不是全部）脚本错误对话框。（FileDownloaded处理大多数情况，除了WebBrowser.GoBack，它由Navigated处理。单独导航将丢失刷新的页面。）
— Ej。
@Ej。很好，我遇到了无法捕获所有JavaScript错误的问题，这很可能会解决问题，您是否有机会举例说明如何实现此问题？
— Jamiegs
5
这就是我用过的东西：pastebin.com/UThKifw8虽然如此，我们也必须让用户升级到IE8，然后对话框才能完全消失。
— Ej。
仅供参考，我无法使用此解决方案，因为HTML页面包含框架集和框架，这导致跨框架安全检查引发异常（请参阅WebBrowser.Document属性getter引发UnauthorizedAccessException）
— redcalx
13

以上解决方案均不适合我的情况，处理.Navigated和.FileDownload事件似乎很合适，但访问WebBrowser.Document属性引发UnauthorizedAccessException，这是由跨框架脚本安全性引起的（我们的Web内容包含框架-全部相同的域/地址，但框架具有自己的安全漏洞，这些安全漏洞已被阻止）。

有效的解决方案是重写IOleCommandTarget并在该级别捕获脚本错误命令。这是实现此目的的WebBrowser子类：

/// <summary>
/// Subclassed WebBrowser that suppresses error pop-ups.
/// 
/// Notes.
/// ScriptErrorsSuppressed property is not used because this actually suppresses *all* pop-ups.
/// 
/// More info at:
/// http://stackoverflow.com/questions/2476360/disable-javascript-error-in-webbrowser-control
/// </summary>
public class WebBrowserEx : WebBrowser
{
    #region Constructor

    /// <summary>
    /// Default constructor.
    /// Initialise browser control and attach customer event handlers.
    /// </summary>
    public WebBrowserEx()
    {
        this.ScriptErrorsSuppressed = false;
    }

    #endregion

    #region Overrides

    /// <summary>
    /// Override to allow custom script error handling.
    /// </summary>
    /// <returns></returns>
    protected override WebBrowserSiteBase CreateWebBrowserSiteBase()
    {
        return new WebBrowserSiteEx(this);
    }

    #endregion

    #region Inner Class [WebBrowserSiteEx]

    /// <summary>
    /// Sub-class to allow custom script error handling.
    /// </summary>
    protected class WebBrowserSiteEx : WebBrowserSite, NativeMethods.IOleCommandTarget
    {
        /// <summary>
        /// Default constructor.
        /// </summary>
        public WebBrowserSiteEx(WebBrowserEx webBrowser) : base (webBrowser)
        {   
        }

        /// <summary>Queries the object for the status of one or more commands generated by user interface events.</summary>
        /// <param name="pguidCmdGroup">The GUID of the command group.</param>
        /// <param name="cCmds">The number of commands in <paramref name="prgCmds" />.</param>
        /// <param name="prgCmds">An array of OLECMD structures that indicate the commands for which the caller needs status information. This method fills the <paramref name="cmdf" /> member of each structure with values taken from the OLECMDF enumeration.</param>
        /// <param name="pCmdText">An OLECMDTEXT structure in which to return name and/or status information of a single command. This parameter can be null to indicate that the caller does not need this information.</param>
        /// <returns>This method returns S_OK on success. Other possible return values include the following.
        /// E_FAIL The operation failed.
        /// E_UNEXPECTED An unexpected error has occurred.
        /// E_POINTER The <paramref name="prgCmds" /> argument is null.
        /// OLECMDERR_E_UNKNOWNGROUP The <paramref name="pguidCmdGroup" /> parameter is not null but does not specify a recognized command group.</returns>
        public int QueryStatus(ref Guid pguidCmdGroup, int cCmds, NativeMethods.OLECMD prgCmds, IntPtr pCmdText)
        {
            if((int)NativeMethods.OLECMDID.OLECMDID_SHOWSCRIPTERROR == prgCmds.cmdID)
            {   // Do nothing (suppress script errors)
                return NativeMethods.S_OK;
            }

            // Indicate that command is unknown. The command will then be handled by another IOleCommandTarget.
            return NativeMethods.OLECMDERR_E_UNKNOWNGROUP;
        }

        /// <summary>Executes the specified command.</summary>
        /// <param name="pguidCmdGroup">The GUID of the command group.</param>
        /// <param name="nCmdID">The command ID.</param>
        /// <param name="nCmdexecopt">Specifies how the object should execute the command. Possible values are taken from the <see cref="T:Microsoft.VisualStudio.OLE.Interop.OLECMDEXECOPT" /> and <see cref="T:Microsoft.VisualStudio.OLE.Interop.OLECMDID_WINDOWSTATE_FLAG" /> enumerations.</param>
        /// <param name="pvaIn">The input arguments of the command.</param>
        /// <param name="pvaOut">The output arguments of the command.</param>
        /// <returns>This method returns S_OK on success. Other possible return values include 
        /// OLECMDERR_E_UNKNOWNGROUP The <paramref name="pguidCmdGroup" /> parameter is not null but does not specify a recognized command group.
        /// OLECMDERR_E_NOTSUPPORTED The <paramref name="nCmdID" /> parameter is not a valid command in the group identified by <paramref name="pguidCmdGroup" />.
        /// OLECMDERR_E_DISABLED The command identified by <paramref name="nCmdID" /> is currently disabled and cannot be executed.
        /// OLECMDERR_E_NOHELP The caller has asked for help on the command identified by <paramref name="nCmdID" />, but no help is available.
        /// OLECMDERR_E_CANCELED The user canceled the execution of the command.</returns>
        public int Exec(ref Guid pguidCmdGroup, int nCmdID, int nCmdexecopt, object[] pvaIn, int pvaOut)
        {
            if((int)NativeMethods.OLECMDID.OLECMDID_SHOWSCRIPTERROR == nCmdID)
            {   // Do nothing (suppress script errors)
                return NativeMethods.S_OK;
            }

            // Indicate that command is unknown. The command will then be handled by another IOleCommandTarget.
            return NativeMethods.OLECMDERR_E_UNKNOWNGROUP;
        }
    }

    #endregion
}

〜

/// <summary>
/// Native (unmanaged) methods, required for custom command handling for the WebBrowser control.
/// </summary>
public static class NativeMethods
{
    /// From docobj.h
    public const int OLECMDERR_E_UNKNOWNGROUP = -2147221244;

    /// <summary>
    /// From Microsoft.VisualStudio.OLE.Interop (Visual Studio 2010 SDK).
    /// </summary>
    public enum OLECMDID
    {
        /// <summary />
        OLECMDID_OPEN = 1,
        /// <summary />
        OLECMDID_NEW,
        /// <summary />
        OLECMDID_SAVE,
        /// <summary />
        OLECMDID_SAVEAS,
        /// <summary />
        OLECMDID_SAVECOPYAS,
        /// <summary />
        OLECMDID_PRINT,
        /// <summary />
        OLECMDID_PRINTPREVIEW,
        /// <summary />
        OLECMDID_PAGESETUP,
        /// <summary />
        OLECMDID_SPELL,
        /// <summary />
        OLECMDID_PROPERTIES,
        /// <summary />
        OLECMDID_CUT,
        /// <summary />
        OLECMDID_COPY,
        /// <summary />
        OLECMDID_PASTE,
        /// <summary />
        OLECMDID_PASTESPECIAL,
        /// <summary />
        OLECMDID_UNDO,
        /// <summary />
        OLECMDID_REDO,
        /// <summary />
        OLECMDID_SELECTALL,
        /// <summary />
        OLECMDID_CLEARSELECTION,
        /// <summary />
        OLECMDID_ZOOM,
        /// <summary />
        OLECMDID_GETZOOMRANGE,
        /// <summary />
        OLECMDID_UPDATECOMMANDS,
        /// <summary />
        OLECMDID_REFRESH,
        /// <summary />
        OLECMDID_STOP,
        /// <summary />
        OLECMDID_HIDETOOLBARS,
        /// <summary />
        OLECMDID_SETPROGRESSMAX,
        /// <summary />
        OLECMDID_SETPROGRESSPOS,
        /// <summary />
        OLECMDID_SETPROGRESSTEXT,
        /// <summary />
        OLECMDID_SETTITLE,
        /// <summary />
        OLECMDID_SETDOWNLOADSTATE,
        /// <summary />
        OLECMDID_STOPDOWNLOAD,
        /// <summary />
        OLECMDID_ONTOOLBARACTIVATED,
        /// <summary />
        OLECMDID_FIND,
        /// <summary />
        OLECMDID_DELETE,
        /// <summary />
        OLECMDID_HTTPEQUIV,
        /// <summary />
        OLECMDID_HTTPEQUIV_DONE,
        /// <summary />
        OLECMDID_ENABLE_INTERACTION,
        /// <summary />
        OLECMDID_ONUNLOAD,
        /// <summary />
        OLECMDID_PROPERTYBAG2,
        /// <summary />
        OLECMDID_PREREFRESH,
        /// <summary />
        OLECMDID_SHOWSCRIPTERROR,
        /// <summary />
        OLECMDID_SHOWMESSAGE,
        /// <summary />
        OLECMDID_SHOWFIND,
        /// <summary />
        OLECMDID_SHOWPAGESETUP,
        /// <summary />
        OLECMDID_SHOWPRINT,
        /// <summary />
        OLECMDID_CLOSE,
        /// <summary />
        OLECMDID_ALLOWUILESSSAVEAS,
        /// <summary />
        OLECMDID_DONTDOWNLOADCSS,
        /// <summary />
        OLECMDID_UPDATEPAGESTATUS,
        /// <summary />
        OLECMDID_PRINT2,
        /// <summary />
        OLECMDID_PRINTPREVIEW2,
        /// <summary />
        OLECMDID_SETPRINTTEMPLATE,
        /// <summary />
        OLECMDID_GETPRINTTEMPLATE
    }

    /// <summary>
    /// From Microsoft.VisualStudio.Shell (Visual Studio 2010 SDK).
    /// </summary>
    public const int S_OK = 0;

    /// <summary>
    /// OLE command structure.
    /// </summary>
    [StructLayout(LayoutKind.Sequential)]
    public class OLECMD
    {
        /// <summary>
        /// Command ID.
        /// </summary>
        [MarshalAs(UnmanagedType.U4)]
        public int cmdID;
        /// <summary>
        /// Flags associated with cmdID.
        /// </summary>
        [MarshalAs(UnmanagedType.U4)]
        public int cmdf;
    }

    /// <summary>
    /// Enables the dispatching of commands between objects and containers.
    /// </summary>
    [ComVisible(true), Guid("B722BCCB-4E68-101B-A2BC-00AA00404770"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    [ComImport]
    public interface IOleCommandTarget
    {
        /// <summary>Queries the object for the status of one or more commands generated by user interface events.</summary>
        /// <param name="pguidCmdGroup">The GUID of the command group.</param>
        /// <param name="cCmds">The number of commands in <paramref name="prgCmds" />.</param>
        /// <param name="prgCmds">An array of <see cref="T:Microsoft.VisualStudio.OLE.Interop.OLECMD" /> structures that indicate the commands for which the caller needs status information.</param>
        /// <param name="pCmdText">An <see cref="T:Microsoft.VisualStudio.OLE.Interop.OLECMDTEXT" /> structure in which to return name and/or status information of a single command. This parameter can be null to indicate that the caller does not need this information.</param>
        /// <returns>This method returns S_OK on success. Other possible return values include the following.
        /// E_FAIL The operation failed.
        /// E_UNEXPECTED An unexpected error has occurred.
        /// E_POINTER The <paramref name="prgCmds" /> argument is null.
        /// OLECMDERR_E_UNKNOWNGROUPThe <paramref name="pguidCmdGroup" /> parameter is not null but does not specify a recognized command group.</returns>
        [PreserveSig]
        [return: MarshalAs(UnmanagedType.I4)]
        int QueryStatus(ref Guid pguidCmdGroup, int cCmds, [In] [Out] NativeMethods.OLECMD prgCmds, [In] [Out] IntPtr pCmdText);

        /// <summary>Executes the specified command.</summary>
        /// <param name="pguidCmdGroup">The GUID of the command group.</param>
        /// <param name="nCmdID">The command ID.</param>
        /// <param name="nCmdexecopt">Specifies how the object should execute the command. Possible values are taken from the <see cref="T:Microsoft.VisualStudio.OLE.Interop.OLECMDEXECOPT" /> and <see cref="T:Microsoft.VisualStudio.OLE.Interop.OLECMDID_WINDOWSTATE_FLAG" /> enumerations.</param>
        /// <param name="pvaIn">The input arguments of the command.</param>
        /// <param name="pvaOut">The output arguments of the command.</param>
        /// <returns>This method returns S_OK on success. Other possible return values include 
        /// OLECMDERR_E_UNKNOWNGROUP The <paramref name="pguidCmdGroup" /> parameter is not null but does not specify a recognized command group.
        /// OLECMDERR_E_NOTSUPPORTED The <paramref name="nCmdID" /> parameter is not a valid command in the group identified by <paramref name="pguidCmdGroup" />.
        /// OLECMDERR_E_DISABLED The command identified by <paramref name="nCmdID" /> is currently disabled and cannot be executed.
        /// OLECMDERR_E_NOHELP The caller has asked for help on the command identified by <paramref name="nCmdID" />, but no help is available.
        /// OLECMDERR_E_CANCELED The user canceled the execution of the command.</returns>
        [PreserveSig]
        [return: MarshalAs(UnmanagedType.I4)]
        int Exec(ref Guid pguidCmdGroup, int nCmdID, int nCmdexecopt, [MarshalAs(UnmanagedType.LPArray)] [In] object[] pvaIn, int pvaOut);
    }
}
— Redcalx
source
谢谢你，谢谢你，谢谢你。然后，此时此刻只有可行的解决方案。非常感谢：D。
— Beniamin 2015年
直到下一个IE版本！
— redcalx
我懂了。该方法支持哪些IE版本？
— Beniamin
我当时使用的是IE10和11，但主要要担心的是IE替代产品-Microsoft Edge发生了什么。
— redcalx
1
Microsoft Edge不会发生任何事情，因为Microsoft不会让您将Edge嵌入WinForms应用程序中，试图强迫您为其锁定的新“ Universal”平台构建应用程序-（embed在此页面上搜索- dev.windows.com/en-us/microsoft-edge/platform/faq/apps-engine）
— 韦恩Bloss
1

这是一个替代解决方案：

class extendedWebBrowser : WebBrowser
{
    /// <summary>
    /// Default constructor which will make the browser to ignore all errors
    /// </summary>
    public extendedWebBrowser()
    {
        this.ScriptErrorsSuppressed = true;

        FieldInfo field = typeof(WebBrowser).GetField("_axIWebBrowser2", BindingFlags.Instance | BindingFlags.NonPublic);
        if (field != null)
        {
             object axIWebBrowser2 = field.GetValue(this);
             axIWebBrowser2.GetType().InvokeMember("Silent", BindingFlags.SetProperty, null, axIWebBrowser2, new object[] { true });
        }
    }
}
— 弗拉德·斯派瑞斯
source
0

我刚发现这个：

 private static bool TrySetSuppressScriptErrors(WebBrowser webBrowser, bool value)
    {
        FieldInfo field = typeof(WebBrowser).GetField("_axIWebBrowser2", BindingFlags.Instance | BindingFlags.NonPublic);
        if (field != null)
        {
            object axIWebBrowser2 = field.GetValue(webBrowser);
            if (axIWebBrowser2 != null)
            {
                axIWebBrowser2.GetType().InvokeMember("Silent", BindingFlags.SetProperty, null, axIWebBrowser2, new object[] { value });
                return true;
            }
        }

        return false;
    }

将webBrowser设置为静音的用法示例：TrySetSuppressScriptErrors（webBrowser，true）

— 阿迪尔
source
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