C# webBrowser script error

Question

I keep getting a script error when trying to load the page using webBrowser.Navigate(\"https://home.nest.com/\"). It will pull up fine from my normal internet

Answer 1

The script errors happen all of the time in the integrated Internet Explorer WebBrowser control even when it's using version 11. Modern websites rely heavily on massive Javascript files and dynamic rendering. You can see that just by watching that page load in a regular browser. The control just can't cut it some of the times.

You might want to try some alternative browser controls. There are no guarantees that it will work with any of them, but at least it's something to try.

• Awesomium : Originally based on Chromium. I don't know if they still integrate Chromium changes or if they've gone in their own direction. It's free for personal use as well as commercial making less than $100k.
• DotNetBrowser : Embed a Chromium-based WPF / WinForms component into your .NET application to display modern web pages built with HTML5, CSS3, JavaScript, Silverlight etc.
• geckofx : An open-source component for embedding Mozilla Gecko (Firefox) in .NET applications.
• Xilium.CefGlue : A .NET/Mono binding for The Chromium Embedded Framework (CEF) by Marshall A. Greenblatt.
• BrowseEmAll : BrowseEmAll.Cef (Chrome), BrowseEmAll.Gecko (Firefox), BrowseEmAll Core API (Chrome,Firefox,IE - COMMERCIAL)

There are probably others, but this should give you a start with some of the more popular active projects if you want to pursue this route.

Answer 2

The WebBrowser control is capable of rendering most web pages, but by default it attempts to render pages in compatibility mode (pretty much IE7, hence the issues). If you are building your own page, it's simple, just add the following tag to the header and it should render fine...

<meta http-equiv="X-UA-Compatible" content="IE=Edge" />

However, if you are trying to render a third party site you cannot add tags to, things get more difficult. As mentioned above, you can use a registry key (HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION) if it's just on your own machine.

If neither of these options are a possible solution, using a different browser control (again, great suggestions above) is pretty much your only option.

There's a great blog on controlling the browser control compatibility mode at https://docs.microsoft.com/en-gb/archive/blogs/patricka/controlling-webbrowser-control-compatibility

Answer 3

as this link answer:

you must only add this line:

webBrowser.ScriptErrorsSuppressed = true;

Answer 4

  private void Form1_Load(object sender, EventArgs e)
  {
            var appName = Process.GetCurrentProcess().ProcessName + ".exe";
            SetIE8KeyforWebBrowserControl(appName);

            webBrowser1.ScriptErrorsSuppressed = true;
  }



private void SetIE8KeyforWebBrowserControl(string appName)
{
     RegistryKey Regkey = null;
     try
     {
         // For 64 bit machine
         if (Environment.Is64BitOperatingSystem)
              Regkey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE\\Wow6432Node\\Microsoft\\Internet Explorer\\Main\\FeatureControl\\FEATURE_BROWSER_EMULATION", true);
         else  //For 32 bit machine
               Regkey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE\\Microsoft\\Internet Explorer\\Main\\FeatureControl\\FEATURE_BROWSER_EMULATION", true);

          // If the path is not correct or
          // if the user haven't priviledges to access the registry
          if (Regkey == null)
          {
              MessageBox.Show("Application Settings Failed - Address Not found");
              return;
          }

          string FindAppkey = Convert.ToString(Regkey.GetValue(appName));

          // Check if key is already present
          if (FindAppkey == "8000")
          {
              MessageBox.Show("Required Application Settings Present");
              Regkey.Close();
              return;
          }

          // If a key is not present add the key, Key value 8000 (decimal)
          if (string.IsNullOrEmpty(FindAppkey))
              Regkey.SetValue(appName, unchecked((int)0x1F40), RegistryValueKind.DWord);

           // Check for the key after adding
           FindAppkey = Convert.ToString(Regkey.GetValue(appName));

           if (FindAppkey == "8000")
               MessageBox.Show("Application Settings Applied Successfully");
           else
               MessageBox.Show("Application Settings Failed, Ref: " + FindAppkey);
       }
       catch (Exception ex)
       {
           MessageBox.Show("Application Settings Failed");
           MessageBox.Show(ex.Message);
       }
       finally
       {
           // Close the Registry
           if (Regkey != null)
               Regkey.Close();
       }
   }

Answer 5

You should add your program name to the register HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION for using the latest feature as same as your normal internet browser.

as for me, value 8000 (0x1F40) - IE8 mode can solve many script error problem.

Ref:

Use latest version of Internet Explorer in the webbrowser control

Answer 6

You may even set the registry value to 11000 to have the latest version of IE!!