event args assigning
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24-10-2019 - |
Question
i have this event handler
Temp.MouseLeftButtonDown += new MouseButtonEventHandler(Temp_MouseLeftButtonDown);
but i wanna send some parameter to access in the Temp_MouseLeftButtonDown function. how can i assign it ??
Solution
You can't do it directly, because the event handler can only expect a compatible signature with MouseButtonEventHandler.
If you're using C# 3, the easiest approach would be to use a lambda expression - something like:
Temp.MouseLeftButtonDown +=
(sender, args) => Temp_MouseLeftButtonDown(sender, args, "extra argument");
Does that help? Of course, if you don't need both the sender and event args, you don't have to supply them.
In C# 2 you could use an anonymous method in the same way.
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