On 07/06/2010 21:26, Ken MacDonald wrote:
Hi,
I've got a whole stack of event handlers, assigned via the usual
something like....
my_button.Click += button_was_clicked
As it turns out, the initialization for the thing that has all these
handlers may need to be run several times, and it seems like I ended
up with multiple copies of the same event handler, and
"button_was_clicked()" now gets invoked multiple times for EACH time I
click my_button. It seems to be solved by just skipping the handler
assignment if I've already done it before, but it seems odd that the
same EH would be assigned and fired twice.
It would seem odder to me if you added an event handler multiple times
and it *wasn't* called. :-)
The less programming languages read your mind and work out what they
*think* you meant the better. If you don't want an event handler
installed multiple times then don't add it multiple times...
Michael Foord
Is this really what I'm seeing? I can see a case for assigning
multiple *different* EH's:
my_button.Click += event_handler_1
my_button.Click += event_handler_2
but then this begs the question, is there a defined order in which the
EH's will fire? I looked thru multiple python/IronPython books and
googled, but came up empty on both questions..... Hopefully someone
here understands these things better than I do....
Ken
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