Detect if an event has event handler

Hi,

I need to bind the dropdown event to an event handler, but not from
beginning (in form's load or constructor), but little bit later, when
a background process completes.

Is there any way to detect if I already bound a handler to the event
(to not bind the handler several times)

Thank you

Re: Detect if an event has event handler

>Is there any way to detect if I already bound a handler to the event
>(to not bind the handler several times)

The easiest way is to just keep track of that in a boolean field.


Mattias

--
Mattias Sjögren [C# MVP] mattias @ mvps.org
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Re: Detect if an event has event handler

On 18 Noi, 16:51, Mattias Sjögren
wrote:
> >Is there any way to detect if I already bound a handler to the event
> >(to not bind the handler several times)
>
> The easiest way is to just keep track of that in a boolean field.

I thought maybe it is a more elegant way

Thanks

Re: Detect if an event has event handler

Hi,

if you attach the same handler from the same object instance twice, it will
still be only called once.

Kind regards,
Henning Krause



"bz" wrote in message
news:58cc3ccf-7b76-4cd2-9edd-ef0eb89675eb@b15g2000hsa.google groups.com...
On 18 Noi, 16:51, Mattias Sjögren
wrote:
> >Is there any way to detect if I already bound a handler to the event
> >(to not bind the handler several times)
>
> The easiest way is to just keep track of that in a boolean field.

I thought maybe it is a more elegant way

Thanks

Re: Detect if an event has event handler

>if you attach the same handler from the same object instance twice, it will
>still be only called once.

No, it will be called once for each time you add it.


Mattias

--
Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
Please reply only to the newsgroup.

Re: Detect if an event has event handler

bz.

ind in files.

An event method can as well be used without an event.

Cor