SelectedIndexChanged event does not fire if Item is already selected in dropdown?

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Assume that I have a dropdown with 2 items and by default, the first item is selected. If I select the click the first item in the dropdown, is there a way I can get the selectedIndexChanged event to still fire?

Posted 6-Dec-11 11:33am

amit2620

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Not Active · Answer 1 · 2011-12-06T11:55:00

Solution 1

No the event will not fire because the index has not changed

Posted 6-Dec-11 11:55am

Not Active

Sergey Alexandrovich Kryukov · Answer 2 · 2011-12-06T12:06:00

No, because you really don't change the selection, but if the event was added to the invocation list before it was selected programmatically, you will have this event fired without a click, which is not what you want.

You can do the following. Add a separate method to implement all the code you put in the event handler, because you will need to call if from more than on place. Call this method from your event. This way you have re-factored the code, that is, no functionality was changed so far. Add another event handler to the invocation list of the event Click, and call the separate method mentioned above on condition, only when it happens for the first time (add a flag "ClickedFirstTime" or something like that). Even though it will give you the effect you wanted, I don't really recommend doing it. Rather, I would advice you to fix the design of the code. See below.

Yes, this question tells me that you rather have a problem in your code design, not in implementation of the particular technique. The paragraph above should give you an idea. If selection is not changed, you should not fire or simulate the event intended to be used on selection change. The call to the separate method I mentioned below should be done before all those control events and be a part of the UI population.

—SA