[IronPython] Excel events from IronPython?

[Christian Muirhead]

Thanks Dino -

This is exactly what I needed.

I found two articles that talk a bit about what is happening behind the 
scenes here (although they're more focused on providing .NET 
functionality to COM code, rather than the other way), if anyone else is 
interested.

http://www.15seconds.com/issue/040721.htm
http://www.15seconds.com/issue/060309.htm

Cheers,
Christian

Dino Viehland wrote:
> I think this is what you want:
> 
> import clr
> clr.AddReferenceByName('Microsoft.Office.Interop.Excel, Version=11.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c')
> import Microsoft.Office.Interop.Excel as Excel
> ex = Excel.ApplicationClass()
> from System.Reflection import Missing
> xlBook = ex.Workbooks.Add( Missing.Value )
> 
> xlSheet1 = xlBook.Worksheets[1]
> xlSheet1.Activate()
> 
> def foo(*args): print args
> 
> Excel.DocEvents_Event.add_Change(xlSheet1, foo)
> 
> 
> This is a really odd way to do this but there's multiple types we can find that are associated with the COM object.  Currently we're picking just one of the COM interfaces which is supported on the object so to use the other interfaces you need to call directly through the interface.
> 
> In this case if you look at the Worksheet class in MS.Office.Interop.Excel you'll see it implements:
> 
> MS.Office.Interop.Excel_Worksheet
> MS.Office.Interop.Excel.DocEvents_Event
> 
> We're picking _Worksheet as the interface type instead of Worksheet.
> 
> -----Original Message-----
> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Christian Muirhead
> Sent: Thursday, May 24, 2007 6:11 AM
> To: Discussion of IronPython
> Subject: [IronPython] Excel events from IronPython?
> 
> Hi -
> 
> I'm automating Excel from IP, which has been a bit painful, but looks to
> be working now. One extra thing I'd like to do is to subscribe to a
> worksheet's change event.
> 
> This (http://support.microsoft.com/kb/302815/) is an article that does
> in C# essentially what I'd like to do in IP. I can construct an
> AppEvents_SheetChangeEventHandler delegate wrapped around a function,
> but I can't find the event to hook it up - there's no .Change event on
> the worksheet.
> 
> Nosing around the Microsoft.Office.Interop.Excel namespace (the Excel
> object model documentation is pretty patchy, although I've looked there
> too), I can see a type called AppEvents_Event, which does seem to expose
> the events I want. But I can't work out how to instantiate it (or even
> whether I should be trying to), and trying to attach the delegate to the
> event on the type results in:
> 
>  >>> Excel.AppEvents_Event.SheetChange +=
> Excel.AppEvents_SheetChangeEventHandler(func)
> Traceback (most recent call last):
>    File , line 0, in <stdin>##165
> StandardError: Non-static method requires a target.
> 
> (Which is pretty clear.)
> 
> I'm about to try following the example in C#, and hopefully I'll be able
> to work out what the C# code's doing differently.
> 
> In the meantime, has anyone successfully consumed Excel (or any Office
> application) events in IronPython? Can anyone familiar with COM<->.NET
> interop see what I should be doing?
> 
> Thanks,
> Christian
> 
> --
> Christian Muirhead
> Resolver Systems
> christian.muirhead at resolversystems.com
> 
> Office address:     17a Clerkenwell Road, London EC1M 5RD, UK
> Registered address: 843 Finchley Road, London NW11 8NA, UK
> 
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> number 5467329.
> VAT No. GB 893 5643 79
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-- 
Christian Muirhead
Resolver Systems
christian.muirhead at resolversystems.com

Office address:     17a Clerkenwell Road, London EC1M 5RD, UK
Registered address: 843 Finchley Road, London NW11 8NA, UK

Resolver Systems Limited is registered in England and Wales as company 
number 5467329.
VAT No. GB 893 5643 79