[IronPython] Add/remove python function to C# event in C#

[Dan Eloff]

On Sun, Jul 13, 2008 at 8:19 PM, Dino Viehland
<dinov at exchange.microsoft.com> wrote:
> It should just work in the next release :).  There are problems with it right now but I checked in a fix to make this work last week.

Well I don't use it right away, so I'll just plumb it in like that,
and it'll be working by the time I need it. Thanks for your help.

-Dan

>
> -----Original Message-----
> From: users-bounces at lists.ironpython.com [mailto:users-bounces at lists.ironpython.com] On Behalf Of Dan Eloff
> Sent: Sunday, July 13, 2008 6:12 PM
> To: Discussion of IronPython
> Subject: Re: [IronPython] Add/remove python function to C# event in C#
>
> On Sun, Jul 13, 2008 at 7:20 PM, Dino Viehland
> <dinov at exchange.microsoft.com> wrote:
>> Ahh I see what you mean now.  If you're doing this from the hosting APIs you can use the ObjectOperations class to do the conversion:
>>
>> someObj.someEvent += objOps.ConvertTo<DelegateType>(obj);
>
> That is disturbingly easy. I knew you'd know the answer.
>
> But I wonder if that would work for removing a handler from an event?
>
> someObj.someEvent += objOps.ConvertTo<DelegateType>(obj);
> someObj.someEvent -= objOps.ConvertTo<DelegateType>(obj);
>
> One workaround might be to cache the delegate on the way in and use
> the cached delegate to remove it.
>
> _cache[obj] = objOps.ConvertTo<DelegateType>(obj);
> someObj.someEvent += _cache[obj]
>
> someObj.someEvent -= _cache[obj]
>
> But maybe there's a better way, or maybe I'm daft and it'll just work.
>
> -Dan
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