Re: How to disable flash content in webbrowser control?
On Dec 20 2008, 3:10 am, "lovespring" <nospam...@xxxxxxxxxxxxx> wrote: flash is almost consumes all my CPU time. The WebBrowser Control gives you control over what it downloads, displays, and executes. in order to restrict what IE was showing (such as images, ActiveX controls, Java). add a method with the COM dispatch identifier of -5512, this does the job for you.Make the Form COMVisible - if not, OnSetBrowserOptions() will not be called. using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; namespace WalkNet { public enum BrowserOptions : uint { /// <summary> /// No flags are set. /// </summary> None = 0, /// <summary> /// The browser will operate in offline mode. Equivalent to DLCTL_FORCEOFFLINE. /// </summary> AlwaysOffline = 0x10000000, /// <summary> /// The browser will play background sounds. Equivalent to DLCTL_BGSOUNDS. /// </summary> BackgroundSounds = 0x00000040, /// <summary> /// Specifies that the browser will not run Active-X controls. Use this setting /// to disable Flash movies. Equivalent to DLCTL_NO_RUNACTIVEXCTLS. /// </summary> DontRunActiveX = 0x00000200, DownloadOnly = 0x00000800, /// <summary> /// Specifies that the browser should fetch the content from the server. If the server's /// content is the same as the cache, the cache is used.Equivalent to DLCTL_RESYNCHRONIZE. /// </summary> IgnoreCache = 0x00002000, /// <summary> /// The browser will force the request from the server, and ignore the proxy, even if the /// proxy indicates the content is up to date.Equivalent to DLCTL_PRAGMA_NO_CACHE. /// </summary> IgnoreProxy = 0x00004000, /// <summary> /// Specifies that the browser should download and display images. This is set by default. /// Equivalent to DLCTL_DLIMAGES. /// </summary> Images = 0x00000010, /// <summary> /// Disables downloading and installing of Active-X controls.Equivalent to DLCTL_NO_DLACTIVEXCTLS. /// </summary> NoActiveXDownload = 0x00000400, /// <summary> /// Disables web behaviours.Equivalent to DLCTL_NO_BEHAVIORS. /// </summary> NoBehaviours = 0x00008000, /// <summary> /// The browser suppresses any HTML charset specified.Equivalent to DLCTL_NO_METACHARSET. /// </summary> NoCharSets = 0x00010000, /// <summary> /// Indicates the browser will ignore client pulls.Equivalent to DLCTL_NO_CLIENTPULL. /// </summary> NoClientPull = 0x20000000, /// <summary> /// The browser will not download or display Java applets.Equivalent to DLCTL_NO_JAVA. /// </summary> NoJava = 0x00000100, /// <summary> /// The browser will download framesets and parse them, but will not download the frames /// contained inside those framesets.Equivalent to DLCTL_NO_FRAMEDOWNLOAD. /// </summary> NoFrameDownload = 0x00080000, /// <summary> /// The browser will not execute any scripts.Equivalent to DLCTL_NO_SCRIPTS. /// </summary> NoScripts = 0x00000080, /// <summary> /// If the browser cannot detect any internet connection, this causes it to default to /// offline mode.Equivalent to DLCTL_OFFLINEIFNOTCONNECTED. /// </summary> OfflineIfNotConnected = 0x80000000, /// <summary> /// Specifies that UTF8 should be used.Equivalent to DLCTL_URL_ENCODING_ENABLE_UTF8. /// </summary> UTF8 = 0x00040000, /// <summary> /// The browser will download and display video media.Equivalent to DLCTL_VIDEOS. /// </summary> Videos = 0x00000020 } #region COM Interfaces [StructLayout(LayoutKind.Sequential)] internal struct RECT { public int left; public int top; public int right; public int bottom; } [Serializable, StructLayout(LayoutKind.Sequential)] public struct MSG { public IntPtr hwnd; public int message; public IntPtr wParam; public IntPtr lParam; public int time; public int pt_x; public int pt_y; } [ComVisible(true), Guid("0000011B-0000-0000-C000-000000000046"), InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)] public interface IOleContainer { [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int ParseDisplayName([In, MarshalAs(UnmanagedType.Interface)] Object pbc, [In, MarshalAs(UnmanagedType.LPWStr)] String pszDisplayName, [Out, MarshalAs(UnmanagedType.LPArray)] int[] pchEaten, [Out, MarshalAs(UnmanagedType.LPArray)] Object[] ppmkOut); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int EnumObjects([In, MarshalAs(UnmanagedType.U4)] uint grfFlags, [Out, MarshalAs(UnmanagedType.LPArray)] Object[] ppenum); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int LockContainer([In, MarshalAs(UnmanagedType.Bool)] Boolean fLock); } [ComVisible(true), Guid("00000118-0000-0000-C000-000000000046"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] public interface IOleClientSite { [PreserveSig] int SaveObject(); [PreserveSig] int GetMoniker([In, MarshalAs(UnmanagedType.U4)] int dwAssign, [In, MarshalAs(UnmanagedType.U4)] int dwWhichMoniker, [MarshalAs (UnmanagedType.Interface)] out object moniker); [PreserveSig] int GetContainer(out object container); [PreserveSig] int ShowObject(); [PreserveSig] int OnShowWindow(int fShow); [PreserveSig] int RequestNewObjectLayout(); } [ComVisible(true), ComImport(), Guid("00000112-0000-0000-C000-000000000046"), InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)] internal interface IOleObject { [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int SetClientSite([In, MarshalAs(UnmanagedType.Interface)] IOleClientSite pClientSite); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int GetClientSite([Out, MarshalAs(UnmanagedType.Interface)] out IOleClientSite site); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int SetHostNames([In, MarshalAs(UnmanagedType.LPWStr)] String szContainerApp, [In, MarshalAs(UnmanagedType.LPWStr)] String szContainerObj); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int Close([In, MarshalAs(UnmanagedType.U4)] uint dwSaveOption); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int SetMoniker([In, MarshalAs(UnmanagedType.U4)] uint dwWhichMoniker, [In, MarshalAs(UnmanagedType.Interface)] Object pmk); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int GetMoniker([In, MarshalAs(UnmanagedType.U4)] uint dwAssign, [In, MarshalAs(UnmanagedType.U4)] uint dwWhichMoniker, [Out, MarshalAs(UnmanagedType.Interface)] out Object moniker); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int InitFromData([In, MarshalAs(UnmanagedType.Interface)] Object pDataObject, [In, MarshalAs(UnmanagedType.Bool)] Boolean fCreation, [In, MarshalAs(UnmanagedType.U4)] uint dwReserved); int GetClipboardData([In, MarshalAs(UnmanagedType.U4)] uint dwReserved, out Object data); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int DoVerb([In, MarshalAs(UnmanagedType.I4)] int iVerb, [In] IntPtr lpmsg, [In, MarshalAs(UnmanagedType.Interface)] IOleClientSite pActiveSite, [In, MarshalAs(UnmanagedType.I4)] int lindex, [In] IntPtr hwndParent, [In] RECT lprcPosRect); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int EnumVerbs(out Object e); // IEnumOLEVERB [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int OleUpdate(); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int IsUpToDate(); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int GetUserClassID([In, Out] ref Guid pClsid); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int GetUserType([In, MarshalAs(UnmanagedType.U4)] uint dwFormOfType, [Out, MarshalAs(UnmanagedType.LPWStr)] out String userType); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int SetExtent([In, MarshalAs(UnmanagedType.U4)] uint dwDrawAspect, [In] Object pSizel); // tagSIZEL [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int GetExtent([In, MarshalAs(UnmanagedType.U4)] uint dwDrawAspect, [Out] Object pSizel); // tagSIZEL [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int Advise([In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IAdviseSink pAdvSink, out int cookie); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int Unadvise([In, MarshalAs(UnmanagedType.U4)] int dwConnection); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int EnumAdvise(out Object e); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int GetMiscStatus([In, MarshalAs(UnmanagedType.U4)] uint dwAspect, out int misc); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] int SetColorScheme([In] Object pLogpal); // tagLOGPALETTE } [ComImport, Guid("B196B288-BAB4-101A-B69C-00AA00341D07"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] public interface IOleControl { [PreserveSig] int GetControlInfo([Out] object pCI); [PreserveSig] int OnMnemonic([In] ref MSG pMsg); [PreserveSig] int OnAmbientPropertyChange(int dispID); [PreserveSig] int FreezeEvents(int bFreeze); } [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("79eac9c9-baf9-11ce-8c82-00aa004ba90b")] public interface IPersistMoniker { [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] Int32 GetClassID([Out] out Guid pClassID); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] Int32 GetCurMoniker([Out, MarshalAs(UnmanagedType.Interface)] out System.Runtime.InteropServices.ComTypes.IMoniker ppimkName); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] Int32 IsDirty(); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] Int32 Load([In] int bFullyAvailable, [In, MarshalAs (UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IMoniker pimkName, [In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IBindCtx pibc, [In] int grfMode); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] Int32 Save( [In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IMoniker pimkName, [In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IBindCtx pibc, [In] bool fRemember); [return: MarshalAs(UnmanagedType.I4)] [PreserveSig] Int32 SaveCompleted( [In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IMoniker pimkName, [In, MarshalAs(UnmanagedType.Interface)] System.Runtime.InteropServices.ComTypes.IBindCtx pibc); } [ComImport, InterfaceType(ComInterfaceType.InterfaceIsIUnknown), Guid("9BFBBC02-EFF1-101A-84ED-00AA00341D07")] public interface IPropertyNotifySink { void OnChanged(int dispID); [PreserveSig] int OnRequestEdit(int dispID); } #endregion COM Interfaces [ComVisible(true)] public partial class Form1 : Form, IOleClientSite { bool _bFirstTime = true; public Form1() { InitializeComponent(); FetchUserAgent(); } private void FetchUserAgent() { mshtml.IHTMLDocument2 doc = new mshtml.HTMLDocumentClass (); this.UserAgentText.Text = doc.parentWindow.clientInformation.userAgent; } private void ProcessDOM(mshtml.IHTMLDocument2 doc) { DOMTextBox.Clear(); if (doc == null) return; mshtml.IHTMLElementCollection col = doc.all; if (col != null) { DOMTextBox.Text += "Total Elements: " + col.length + "\r\n"; foreach (mshtml.IHTMLElement el in col) { DOMTextBox.AppendText(el.tagName); if (el is mshtml.IHTMLImgElement) { mshtml.IHTMLImgElement img = (mshtml.IHTMLImgElement) el; DOMTextBox.AppendText(" src: " + img.src); } if (el is mshtml.IHTMLLinkElement) { mshtml.IHTMLLinkElement link = (mshtml.IHTMLLinkElement)el; DOMTextBox.AppendText(" href: " + link.href); } if (el is mshtml.IHTMLEmbedElement) { mshtml.IHTMLEmbedElement embed = (mshtml.IHTMLEmbedElement)el; DOMTextBox.AppendText(" src: " + embed.src); } DOMTextBox.AppendText("\r\n"); } } } private void FetchUrl() { if (this.AddressTextBox.Text == "") return; StringBuilder sb = new StringBuilder(); sb.Append("<html><head>"); sb.Append("<script>function runscript() { alert('Ran the script');} </script>"); sb.Append("</head>"); sb.Append("<body ><h1>Example HTML Document</h1><p onClick=\"alert ('Simple script demo');\">Some body text - click to see if scripts are enabled.</p>"); sb.Append("<p><form><input type=\"text\"/><br/><img src=\"C:/ Documents and Settings/jaideept/My Documents/Deccan ticket/Deccan ticket/Deccan ticket_files/logo.gif\" alt=\"bla\" title=\"bla bla bla</ form></p>"); sb.Append("<p><font color=\"red\">Coloured text</font></p>"); sb.Append("<p>Extended chars: " + '\u2660' + " - Spades. Will not work on Win98.</p>"); sb.Append("</body></html>"); this.AddressTextBox.Text = sb.ToString(); this.Cursor = Cursors.WaitCursor; this.UseWaitCursor = true; mshtml.IHTMLDocument4 doc = new mshtml.HTMLDocumentClass (); mshtml.IHTMLDocument2 doc2 = (mshtml.IHTMLDocument2)doc; IOleObject obj = (IOleObject)doc2; obj.SetClientSite(this); doc2.write(sb.ToString()); doc2.close(); doc2 = doc.createDocumentFromUrl(this.AddressTextBox.Text, ""); while (doc2.readyState != "complete") { System.Diagnostics.Debug.WriteLine(doc2.readyState); System.Windows.Forms.Application.DoEvents(); } System.Diagnostics.Debug.WriteLine(doc2.body.innerHTML); this.Text = "WalkNet - " + doc2.title; ProcessDOM(doc2); this.UseWaitCursor = false; this.Cursor = Cursors.Arrow; } private void Form1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Enter) { FetchUrl(); } } [DispId(-5512)] public virtual int IDispatch_Invoke_Handler() { System.Diagnostics.Debug.WriteLine("-5512"); return (int)(BrowserOptions.DownloadOnly | BrowserOptions.DontRunActiveX | BrowserOptions.NoJava | BrowserOptions.NoScripts | BrowserOptions.NoActiveXDownload); } #region IOleClientSite Members public int SaveObject() { return 0; } public int GetMoniker(int dwAssign, int dwWhichMoniker, out object moniker) { moniker = this; return 0; } public int GetContainer(out object container) { container = this; return 0; } public int ShowObject() { return 0; } public int OnShowWindow(int fShow) { return 0; } public int RequestNewObjectLayout() { return 0; } #endregion private void toolStripButton1_Click(object sender, EventArgs e) { FetchUrl(); } private void Form1_Activated(object sender, EventArgs e) { if (_bFirstTime) { _bFirstTime = false; FetchUrl(); } } } } .
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