Monitoring ajax calls from IE BHO

Question

I am trying to find a way to detect changes on a page from BHO. For the Firefox version of the plugin, I use DomNodeInserted , but this is not available in IE. I also looked at using onpropertychange , but this allows you to control only one element (and not children).

Now I am wondering if it is possible to track when AJAX requests are called. If so, I can make changes to the page after completing the AJAX request. The only problem is that I cannot find a way to do this.

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Here, my attempt so far, based on jeffamaphone suggestions, does not work, but perhaps it will eclipse someone's memory.

  public class ChangeMonitor : IHTMLChangeSink { public void Notify() { Trace.WriteLine("notified"); } } void registerMonitor() { HTMLDocument document = _webBrowser2.Document; ChangeMonitor monitor = new ChangeMonitor(); IHTMLChangeSink changeSink = monitor; IHTMLChangeLog changeLog = null; ((IMarkupContainer2)document).CreateChangeLog(changeSink, out changeLog, 1, 1); } 

Answer 1

For IE, onreadystatechange will work as the equivalent of DomNodeInserted. DHTML behavior must be attached to the element via htc, but the htc file must not exist:

 document.documentElement.addBehavior("foo.htc"); document.documentElement.attachEvent("onreadystatechange", Notify); 

BHO can inject a script to handle the event.

Answer 2

I have never done this, but my theory is that you can use IMarkupContainer2 :: CreateChangeLog () .