C# – Blocking dialogs in .NET WebBrowser control

activexcmshtmlnetwinforms

I have a .NET 2.0 WebBrowser control used to navigate some pages with no user interaction (don't ask…long story). Because of the user-less nature of this application, I have set the WebBrowser control's ScriptErrorsSuppressed property to true, which the documentation included with VS 2005 states will […]"hide all its dialog boxes that originate from the underlying ActiveX control, not just script errors." The MSDN article doesn't mention this, however.
I have managed to cancel the NewWindow event, which prevents popups, so that's taken care of.

Anyone have any experience using one of these and successfully blocking all dialogs, script errors, etc?

EDIT

This isn't a standalone instance of IE, but an instance of a WebBrowser control living on a Windows Form application. Anyone have any experience with this control, or the underlying one, AxSHDocVW?

EDIT again

Sorry I forgot to mention this… I'm trying to block a JavaScript alert(), with just an OK button. Maybe I can cast into an IHTMLDocument2 object and access the scripts that way, I've used MSHTML a little bit, anyone know?

Best Answer

And for an easy way to inject that magic line of javascript, read how to inject javascript into webbrowser control.

Or just use this complete code:

private void InjectAlertBlocker() {
    HtmlElement head = webBrowser1.Document.GetElementsByTagName("head")[0];
    HtmlElement scriptEl = webBrowser1.Document.CreateElement("script");
    string alertBlocker = "window.alert = function () { }";
    scriptEl.SetAttribute("text", alertBlocker);
    head.AppendChild(scriptEl);
}

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Be sure to use System.Net.Mail, not the deprecated System.Web.Mail. Doing SSL with System.Web.Mail is a gross mess of hacky extensions.

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using System.Net.Mail;

var fromAddress = new MailAddress("from@gmail.com", "From Name");
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const string subject = "Subject";
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var smtp = new SmtpClient
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For you to output foo {1, 2, 3} you have to do something like:

string t = "1, 2, 3";
string v = String.Format(" foo {{{0}}}", t);

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Or now, you can also use C# string interpolation like this (a feature available in C# 6.0)

Escaping brackets: String interpolation $(""). It is new feature in C# 6.0.

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