Webbrowser dialog popup block

Question

I am developing a program which has an invisible web browser control that is used for loading data from certain web pages. However, I am having trouble blocking a certain type of popup.

This is the code I am currently using to block popups

private void webBrowser1_NewWindow( object sender, 
                                    System.ComponentModel.CancelEventArgs e)
{
  e.Cancel = true;
}

I have tested it on http://www.popuptest.com/ and it fails to block the Come & Go test and the Modeless Window test. http://i75.servimg.com/u/f75/13/13/40/49/b11.png

Is there a way to block these popups?

This is the javascript which shows the popups

function modelesswin(url,mwidth,mheight){
if (document.all&&window.print) //if ie5
    eval('window.showModelessDialog(url,"","help:0;resizable:1;dialogWidth:'+mwidth+'px;dialogHeight:'+mheight+'px")')
else
eval('window.open(url,"","width='+mwidth+'px,height='+mheight+'px,resizable=1,scrollbars=1")')
}


modelesswin("http://www.popuptest.com/popup1.html",600,600)

Answer 1

Try implementing WebBrowser Feature Control, particularly FEATURE_BLOCK_INPUT_PROMPTS and FEATURE_WEBOC_POPUPMANAGEMENT.

[EDITED] This code works for me with your test site, try it (tested with IE10). Make sure you set features before your WebBrowser gets created (before InitializeComponent below) and you do ScriptErrorsSuppressed = true to suppress script errors caused by blocked pop-ups.

using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Diagnostics;
using Microsoft.Win32;

namespace WinformsWB
{
    public partial class Form1 : Form
    {
         public Form1()
        {
            SetBrowserFeatureControl();
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.webBrowser1.ScriptErrorsSuppressed = true;
            this.webBrowser1.Navigate("http://www.popuptest.com/");
        }

        private void SetBrowserFeatureControlKey(string feature, string appName, uint value)
        {
            using (var key = Registry.CurrentUser.CreateSubKey(
                String.Concat(@"Software\Microsoft\Internet Explorer\Main\FeatureControl\", feature),
                RegistryKeyPermissionCheck.ReadWriteSubTree))
            {
                key.SetValue(appName, (UInt32)value, RegistryValueKind.DWord);
            }
        }

        private void SetBrowserFeatureControl()
        {
            // http://msdn.microsoft.com/en-us/library/ee330720(v=vs.85).aspx

            // FeatureControl settings are per-process
            var fileName = System.IO.Path.GetFileName(Process.GetCurrentProcess().MainModule.FileName);

            // make the control is not running inside Visual Studio Designer
            if (String.Compare(fileName, "devenv.exe", true) == 0 || String.Compare(fileName, "XDesProc.exe", true) == 0)
                return;

            // TODO: FEATURE_BROWSER_MODE - what is it?
            SetBrowserFeatureControlKey("FEATURE_BROWSER_EMULATION", fileName, 9000); // Webpages containing standards-based !DOCTYPE directives are displayed in IE10 Standards mode.
            SetBrowserFeatureControlKey("FEATURE_DISABLE_NAVIGATION_SOUNDS", fileName, 1);
            SetBrowserFeatureControlKey("FEATURE_WEBOC_POPUPMANAGEMENT", fileName, 1);
            SetBrowserFeatureControlKey("FEATURE_BLOCK_INPUT_PROMPTS", fileName, 1);
        }
    }
}