How to pass a parameter from SHDocVw.InternetExplorer event to C# application

Question

I'm using

SHDocVw.InternetExplorer ie = new SHDocVw.InternetExplorer()

At some point I need to trigger an event in my C# application from Internet Explorer. I'm doing that like this:

 var eventObj = btn.GetType()
                .GetEvents()
                .FirstOrDefault(e => e.Name == "HTMLElementEvents_Event_onclick");

            if (eventObj != null) 
                eventObj.AddEventHandler(btn, new HTMLElementEvents_onclickEventHandler(GenericDomEvent));

This works OK, but I need to pass some parameter with this event and I'm not able to figure out how to do that. May be there is a way to call C# method from Internet Explorer? Please advise.

The event cannot provide an arbitrary parameter. Use a lambda expression. — Hans Passant, Feb 02 '17 at 21:51

score 0 · Accepted Answer · answered Feb 03 '17 at 22:02

After many hours of banging head against the wall I came up with a solution. I'm using different event:

  var eventObj = btn.GetType()
                .GetEvents()
                .FirstOrDefault(e => e.Name == "HTMLElementEvents2_Event_onclick");

            if (eventObj != null) 
                eventObj.AddEventHandler(btn, new HTMLElementEvents2_onclickEventHandler(GenericDomEvent));

And here is the event handler:

    private bool GenericDomEvent(IHTMLEventObj e)
    {            
        var element = e.srcElement;
        var command = element.title;
        var param = element.innerText;
        //Do whatever you want...
    }

The idea of this solution is to put the data into DOM element and trigger click event. In C# app you are listening for click event and as soon as event raised you reading your data from the element. Probably not the most elegant solution, but it works!

How to pass a parameter from SHDocVw.InternetExplorer event to C# application

1 Answers1