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Runtime exception generated when no handler subscribed to an event

gary_joynes

Hello, I have a user control which generates 2 events e.g. ItemSelected, ItemDoubleClicked. When I create the user control in code and do not add a handler to one of the events, when the event fires I get "Object reference not set to an instance of an object." I am doing something wrong here? I assume I do not have to handle every event fired by my user control? Many thanks, Gary

2 Replies

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Andrzej Wegierski21y ago
They're Your own events, I think. Use them like this: if(myEventHandler!=null) myEventHandler(this,myEventArgs);
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Mykonine21y ago
It's because there's nothing attached to the event which, for some reason, causes a null reference exception. You might try attaching a function that does nothing.
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