在WebBrowser控件中禁用JavaScript错误
我正在开发一个Web浏览器控件导航到SharePoint站点的Windows应用程序。
我的问题是，我得到JavaScript错误。
我怎样才能禁用JavaScript错误？ 我不希望他们popup。
webBrowser.ScriptErrorsSuppressed = true; 这将禁用脚本错误，并禁用其他窗口，例如NTLMlogin窗口或客户端证书接受窗口。 以下将压制只有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; }
上述解决scheme都不适合我的情况，处理.Navigated和.FileDownload事件似乎是一个很好的select，但访问WebBrowser.Document属性抛出了由跨框架脚本安全性导致的UnauthorizedAccessException（我们的Web内容包含框架 – 所有相同的域/地址，但是帧有自己的安全漏洞被阻止）。
工作的解决scheme是覆盖IOleCommandTarget并捕捉该级别的脚本错误命令。 这是WebBrowser子类来实现这个function：
/// <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); } }
axwebbrowser1.Silent = true;
我刚刚发现这个：
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; }
使用示例将webBrowser设置为静音：TrySetSuppressScriptErrors（webBrowser，true）
这是一个替代解决scheme：
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 }); } } }
